Platinum catalyst for obtaining arenes from synthetic hydrocarbons and method of preparation thereof

FIELD: chemistry.

SUBSTANCE: catalyst contains carrier from porous zeolite KL and binding agent and catalytically active substance - platinum. Carrier additionally contains tin tetrachloride pentahydrate nanopowder, and as binding agent - mixture of gibbsite and rutile powders in equal proportions, with particle size of each not exceeding 40 mcm. Ratio of ingredients is in the following range, wt %: platinum - 0.3-0.8, mixture of gibbsite and rutile powders - 25-70, zeolite KL - 29.12-74.69, tin tetrachloride pentahydrate - 0.01-0.08. Claimed catalyst is characterised by high activity in reactions of aromatisation of synthetic hydrocarbons.

EFFECT: invention also relates to method of obtaining such catalyst.

2 cl, 1 tbl, 4 ex

 

The invention relates to the refining and petrochemical industry and can be used in the production of catalysts of obtaining arenes as petroleum based or synthetic hydrocarbon. The process of obtaining arenes is one of the most important in the processing of synthetic hydrocarbons due to the almost complete absence of aromatic compounds in the products of the Fischer-Tropsch synthesis.

In recent decades, is developing a radically new catalysts receiving arenes of normal paraffin hydrocarbons containing platinum and zeolite L. Zeolite L belongs to the group of high-silica zeolites and is distinguished by the absence of acid sites. The basicity of the media containing zeolite L in the potassium form of zeolite KL), is a necessary property for the selective reactions of aromatization of normal paraffin hydrocarbons. In the channels of zeolite KL as a result of reactions of isomerization is maintained in a mixture of branched, cyclic and normal alkanes.

The use of non-acidic component in the catalyst composition is a fundamentally new approach to the creation of a catalyst for the aromatization of normal paraffin hydrocarbons, as classic aluminium-reforming catalyst is bifunctional and Hara�characterized by the presence of metal and acid sites.

An important criterion catalyst receiving arenes is the size of the Pt particles largely determines the occurrence of adverse reactions (mainly, the experimental data showed alkanes). P. Meriaudeau, C. Naccache. Catal. Rev. - Sci. Eng. 39, 1997, p.5-48. The small size of the platinum particles (1-2 nm) in combination with one-dimensional channels of zeolite KL limit the degree to which the experimental data showed alkanes, increasing the efficiency of the catalytic system.

Known catalyst for the implementation of the cyclization of normal paraffin hydrocarbons. The catalyst prepared by the introduction of platinum in the composition of the zeolite containing germanium. The catalyst was activated by the sequential treatment with hydrogen, sulfur and re is hydrogen. US 7247593 B2, 24.07.2007.

The disadvantages of the catalyst include a complex procedure activation, and low activity in the aromatization of alkanes.

Known platinum catalyst to produce aromatic hydrocarbons containing as a carrier zeolite or alumina and modifier, such as germanium, tin, lead, rhenium, gallium, indium or titanium. For the preparation of a system using the method of impregnation organometallics compounds. Depending on the composition of the system is used both single and multi-stage impregnation of the oxide component. In the case of multistage impregnation is used PR�interstitial annealing. Alternatively, the preparation of the catalyst indicated the introduction of modifiers in the composition of the carrier at the stage of gel before the procedure molding. US 6153090 A1, 28.11.2000.

The disadvantage of the proposed method of preparation of the catalyst is the complexity of its preparation and high kekirawa activity.

Known catalyst for the aromatization gasolinei fractions containing platinum, tin and zeolite L. the catalyst is a preformed zeolite with a binder type L (preferably in the form of KL). As a modifier use tin, which is introduced into the catalyst composition by impregnation with a solution of the corresponding halide (chloride or fluoride). Before the stage of activation, the catalyst is subjected to oxidative heat treatment. Carried out in the presence of this catalyst the process of aromatization gasolinei fraction allows to obtain aromatic hydrocarbons with a high yield and selectivity. US 6177601 B1, 23.01.2001.

The disadvantages of this catalyst include a difficult phase of activation, the low degree of transformation of raw materials into the arena, and is also required for effective process with low operating pressure (100-300 kPa). In the conditions of the industrial process cyclization at low pressure (below 1 MPa) significantly increases the risk of deactivation of the aircraft system�estie coking.

The closest to the proposed group of inventions is a catalyst for aromatizing a hydrocarbon mixture enriched in normal elkanemi6-C7and method for its production. The catalyst contains platinum and zeolite based media zeolite KL. The media is prepared by mixing powders of KL zeolite and a binder, followed by extrusion. The resulting extrudates are dried and calcined, treated with a solution of the corresponding halide (chloride and/or fluoride), dried and calcined. Before the introduction of the active component carrier is subjected to repeated washing with distilled water. Platinum is injected from the solution of tetraammineplatinum platinum with subsequent drying. The method involves the introduction of a promoter in the preparation of the carrier with an intermediate annealing before the introduction of platinum. US 6190539 B1, 20.02.2001.

A disadvantage of the known catalyst and method of its preparation is the low catalytic activity, when the content of aromatic hydrocarbons in the product With5+- 46,5-of 48.5 wt.%.

The technical objective of the proposed group of inventions is to develop a catalyst receiving arenes with high activity and selectivity for the formation of aromatic hydrocarbons and a method for its preparation.

The technical result from implementation of the proposed�internal group of inventions is to improve the catalytic activity of the catalyst by reducing the degree of reactions of the experimental data showed, which leads to the increase in the yield and selectivity for the target product.

The technical problem is solved in that the platinum catalyst receiving arenes of synthetic hydrocarbons contains media from porous zeolite KL and nanopowder tin tetrachloride 5-water, as a binder - powder mixture of gibbsite and rutile in equal proportions, the particle size of each of which does not exceed 40 microns, and a catalytically active material is platinum, and the ratio of ingredients is within the following limits, wt.%:

Platinum0,3-0,8
The powders mixture of gibbsite and rutile25-70
Zeolite KL29,12-74,69
Tin tetrachloride 5 water0,01-0,08

Is used as a binder gibbsite powder with particle size less than 40 microns.

Is used as a binder powder of rutile (titanium dioxide) with a particle size of 0.24 to 0.25 μm.

Nanopowder tin tetrachloride 5-water is obtained by grinding of tin tetrachloride 5 water (crystal) "h" TU 2623-022-4 to a particle size of 80-90 nm.

In accordance with the task razrabotannogo obtain the claimed catalyst.

A method of producing a catalyst for obtaining arenes of synthetic hydrocarbons is characterized in that the preparation is carried out granular media serial by mixing a powder of zeolite KL with nanopowder tin tetrachloride 5-water and pre-mixed fine powders of gibbsite and rutile, particle size of each of which does not exceed 40 microns in equal proportions, the resulting mixture is moistened and peptizing 5-15% solution of nitric acid, stirring to obtain a homogeneous mass, which is then granulated, the resulting granules are dried and calcined, as platinum is applied from an aqueous solution of terramicina platinum.

Before carrying out the process of obtaining arenes synthetic hydrocarbons, the catalyst was recovered hydrogen-containing gas at a temperature of 450°C.

The efficiency of the catalyst was evaluated in the process of obtaining arenes of synthetic hydrocarbons by passing the hydrogen-containing gas and raw materials with the molar ratio of hydrogen to feedstock is from 1:1 to 10:1 through the fixed bed of catalyst loaded in a tubular reactor, space velocity of 0.5-4 h-1in the temperature range 340-550°C under a pressure of 0.1-4 MPa for the yield and content in products of arenes.

The specific implementation of the method disclosed in the following examples.

P�emer 1.

The example illustrates the obtaining of a platinum catalyst on the basis of granulated zeolite carrier, in which the use of commercial high-silica zeolite KL (Zeolyst) with a particle size of not more than 0.2 mm, nanopowder tin tetrachloride 5-water, as a binder - powder mixture of gibbsite and rutile..

A sample of the catalyst composition, wt %: Pt - 0.3, the high-silica zeolite KL - 74,69, tin tetrachloride 5 water is 0.01, a mixture of gibbsite and rutile - 25,0 prepared as follows.

For granulated medium 7.5 g of powdered high-silica zeolite KL, nanopowder tin tetrachloride 5-water - 0,012 g and 2.5 g of a powder mixture of gibbsite and rutile are placed in a porcelain bowl, carefully mix. Add 5% solution of HNO3containing 0,0645 ml of HNO3(65%), and 6.2 ml of distilled water. The mixture was thoroughly stirred to obtain a homogeneous mass is extruded and at piston extruder through a die with a diameter of 1.5 mm extrudates allowed to stand in air for 6 h. Then, the extrudates are placed in a muffle furnace. The mode of drying speed: 60°C - 2 h, 80°C - 2 h, 110°C - 2 h. Then the temperature was raised at a rate of 2°C/min to a temperature of 550°C. At 550°C incubated for 4 h.

Platinum is administered by cationic exchange from an aqueous solution of [(NH3)4Pt]Cl . Complex compound - tetramet platinum [Pt(NH3)4]Cl2get in the interaction of hexachloroplatinate ammonium (NH4)2PtCl6with a concentrated solution of ammonia (25%).

20 ml of the prepared solution with a concentration of platinum of 1.5 mg/ml is added to 10 g of the calcined carrier. The mixture was stirred in a porcelain dish for 10 min at room temperature and left in air for 10 h, then the excess solution was separated by decantation. The catalyst was then dried in an electrical Cabinet. The mode of drying is as follows: 60°C - 2 h, 80°C - 2 h, 110°C - 2 hours.

Before carrying out the process of obtaining arenes synthetic hydrocarbons, the catalyst was recovered hydrogen-containing gas at a temperature of 450°C.

Getting arenes is carried out in a tubular reactor with a stationary layer of catalyst at a pressure of 0.1 MPa, molar ratio of hydrogen to raw 3:1 and a space velocity of 2 h-1in the temperature range 340-550°C.

Example 2.

The example illustrates the obtaining of a platinum catalyst on the basis of granulated zeolite carrier, in which the use of commercial high-silica zeolite KL (Zeolyst) with a particle size of not more than 0.2 mm, nanopowder tin tetrachloride 5-water, as a binder - powder mixture of gibbsite and rutile.

Sample Cathal�composition of the mash, wt.%: Pt - 0,5, zeolite KL - was 59.75, tin tetrachloride 5 water is 0.05, a mixture of gibbsite and rutile - 39,70 prepared as follows.

For granulated media 6.0 g of powdered high-silica zeolite KL nanopowder tin tetrachloride 5-water - 0,051 g and 4.0 g of a powder mixture of gibbsite and rutile are placed in a porcelain bowl, carefully mix. Add 10% solution of HNO3containing 0,129 ml of HNO3(65%), and 6.15 ml of distilled water. The mixture was thoroughly stirred to obtain a homogeneous mass is extruded and at piston extruder through a die with a diameter of 1.5 mm extrudates allowed to stand in air for 7 h. Then, the extrudates are placed in a muffle furnace. The mode of drying speed: 60°C - 2 h, 80°C - 2 h, 110°C - 2 h. Then the temperature was raised at a rate of 2°C/min to 550°C. At 550°C incubated for 4 h.

Platinum is administered according to example 1. 20 ml of the prepared solution with a concentration of platinum of 2.5 mg/ml is added to 10 g of the carrier. The mixture was stirred in a porcelain dish for 5 min at room temperature and left in air for 10 h, then the excess solution was separated by decantation. Thereafter, the catalyst was dried in an electrical Cabinet. The mode of drying is as follows: 60°C - 2 h, 80°C - 2 h, 110°C - 2 hours.

Before carrying out the process of obtaining arenes of syntheticethernetport the catalyst was recovered hydrogen-containing gas at a temperature of 450°C.

Getting arenes is carried out in a tubular reactor with a stationary layer of catalyst at a pressure of 1 MPa, a molar ratio of hydrogen to feedstock of 1:1 and space velocity of 0.5 h-1in the temperature range 340-550°C.

Example 3.

The example illustrates the obtaining of a platinum catalyst on the basis of granulated zeolite carrier, in which the use of commercial high-silica zeolite KL (Zeolyst) with a particle size of not more than 0.2 mm, nanopowder tin tetrachloride 5-water - 0,08, a mixture of gibbsite powders and rutile - 30,72.

A sample of the catalyst composition, wt.%: Pt - 0,8, zeolite KL - 29,12, tin tetrachloride 5 water - 0,08, a mixture of gibbsite and rutile - 69,28 prepared as follows.

For granulated media 3.0 g of powdered commercial high-silica zeolite KL, nanopowder tin tetrachloride 5-water - 0,082 g and 7.0 g of a powder mixture of gibbsite and rutile are placed in a porcelain bowl, carefully mix. Add a 15% solution of HNO3containing 0,1935 ml of HNO3(65%), and 6.1 ml of distilled water. The mixture was thoroughly stirred to obtain a homogeneous mass is extruded and at piston extruder through a die with a diameter of 1.5 mm extrudates allowed to stand in air for 7 h. Then, the extrudates are placed in a muffle furnace. The mode of drying speed: 60°C - 2 h, 80°C - 2 h, 110° - 2 h. Then the temperature was raised at a rate of 2°C/min to a temperature of 550°C. At 550°C was allowed to stand for over 4 hours.

Platinum is administered according to example 1. 16 ml of the prepared solution with a concentration of platinum 5.0 mg/ml is added to 10 g of the carrier. The mixture was stirred in a porcelain dish for 10 min at room temperature and left in air for 10 h, then the excess solution was separated by decantation. Thereafter, the catalyst was dried in an electrical Cabinet. The mode of drying is as follows: 60°C - 2 h, 80°C - 2 h, 110°C - 2 hours.

Before carrying out the process of obtaining arenes synthetic hydrocarbons, the catalyst was recovered hydrogen-containing gas at a temperature of 450°C.

Getting arenes is carried out in a tubular reactor with a stationary layer of catalyst at a pressure of 2 MPa, a molar ratio of hydrogen to raw 6:1 and a space velocity of 2 h-1in the temperature range 340-550°C.

Example 4.

The example illustrates the obtaining of a platinum catalyst on the basis of granulated zeolite carrier, in which the use of commercial high-silica zeolite KL (Zeolyst) with a particle size of not more than 0.2 mm, nanopowder tin tetrachloride 5-water, as a binder - powder mixture of gibbsite and rutile in equal proportions, the particle size of each of which does not exceed 40 µm.

A sample of the catalyst composition, wt.%: Pt - 0.3, the zeolite KL - 49,65, tin tetrachloride 5-water - 0.05, the mixture of gibbsite and rutile - 50,00 prepared as follows.

For granulated media 50,00 g of powdered commercial high-silica zeolite KL, nanopowder tin tetrachloride 5-water - 0,052 g, 50,50 g powder mixture of gibbsite and rutile are placed in a porcelain bowl, carefully mix. Add 10% solution of HNO3containing 0,0645 ml of HNO3(65%), and 6.2 ml of distilled water. The mixture was thoroughly stirred to obtain a homogeneous mass, and is extruded at piston extruder through a die with a diameter of 1.5 mm extrudates allowed to stand in air for 8 h. Then, the extrudates are placed in a muffle furnace. The mode of drying speed: 60°C - 2 h, 80°C - 2 h, 110°C - 2 h. Then the temperature was raised at a rate of 2°C/min to a temperature of 550°C. At 550°C incubated for 4 h.

Platinum is administered according to example 1. 20 ml of the prepared solution with a concentration of platinum of 1.5 mg/ml is added to 10 g of the carrier. The mixture was stirred in a porcelain dish for 5 min at room temperature and left in air for 10 h, then the excess solution was separated by decantation. Thereafter, the catalyst was dried in an electrical Cabinet. The mode of drying is as follows: 60°C - 2 h, 80°C - 2 h, 110°C - 2 hours.

Before carrying out the process of obtaining arenes synthetic hydrocarbons, the catalyst was recovered hydrogen-containing gas at a temperature of 450°C.

Getting arenes is carried out in a tubular reactor with a stationary layer of catalyst at a pressure of 2 MPa, a molar ratio of hydrogen to raw 8:1 and space velocity of 1.5 h-1in the temperature range 340-550°C.

The efficiency of the catalyst was estimated from the yield and content in products of aromatic hydrocarbons produced in the process of obtaining arenes of synthetic hydrocarbons by passing the hydrogen-containing gas and the model of raw - n-alkane with a molar ratio of hydrogen to feedstock is from 1:1 to 10:1 through the fixed bed of catalyst loaded in a tubular reactor.

Before carrying out the process of obtaining arenes of synthetic hydrocarbons, the catalyst was recovered hydrogen-containing gas at a temperature of 450°C.

The tests were conducted at a space velocity of 0.5-4 h-1in the temperature range 340-550°C under a pressure of 0.1-4.0 MPa. As a model of raw material used n-hexane or n-octane.

Indicators of the process of producing arenes from n-octane and n-hexane was carried out using the same catalysts according to the invention, presented in the table.

From the data tableside, the proposed catalyst to produce arenes of synthetic hydrocarbons is characterized by high activity in reactions of aromatization of synthetic hydrocarbons.

1. A platinum catalyst receiving arenes of synthetic hydrocarbon-containing medium pore zeolite KL and binder and catalytically active material is platinum, characterized in that the carrier further comprises a nanopowder tin tetrachloride 5-water, and the binder - powder mixture of gibbsite and rutile in equal proportions, the particle size of each of which does not exceed 40 μm, and the ratio of ingredients is within the following limits, wt.%:

Platinum0,3-0,8
A mixture of gibbsite and rutile25-70
Zeolite KL29,12-74,69
Tin tetrachloride 5-water0,01-0,08

2. Preparation method of a platinum catalyst receiving arenes of synthetic hydrocarbons according to claim 1, comprising preparing a granular media based on porous zeolite KL and binder, coating of platinum from aqueous solution of its salts on the carrier path�tonnage exchange and drying, characterized in that the preparation of granular media is carried out by the sequential mixing of the powder of zeolite KL with nanopowder tin tetrachloride 5-water and pre-mixed fine powders of gibbsite and rutile, particle size of each of which does not exceed 40 microns in equal proportions, the resulting mixture is moistened and peptizing 5-15% solution of nitric acid, stirring to obtain a homogeneous mass, which is then granulated, the resulting granules are dried and calcined, as platinum is applied from an aqueous solution of terramicina platinum.



 

Same patents:

FIELD: chemistry.

SUBSTANCE: according to the method, the starting raw material is supplied into two successively connected reaction units - first and second with pentasil ceolite catalyst elements; the reaction units are characterised by the environment for hydrocarbon conversion into aromatic ones; the mixture produced after reaction units are divided into liquid and gas fractions; the gas fraction is supplied into an input of the first and second reaction unit. The gas fraction produced after the reaction units are divided into hydrogen-containing gas and a wide light hydrocarbon fraction containing olefins; the hydrogen-containing gas is supplied into an oxygenate synthesis unit; the formed oxygenated are supplied into an input of the first and second reaction units; the wide light hydrocarbon fraction containing olefins is supplied into an input of the first reaction unit.

EFFECT: using the present invention enables increasing the effectiveness of aromatic hydrocarbon concentrates and the alkyl benzene, particularly xylene, selectivity.

19 cl, 5 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: described is catalyst of hydroisomerisation, including zeolite of ZSM-23 type, palladium and aluminium oxide, containing components in the following concentrations, wt %: zeolite of ZSM-23- 50-80, palladium - not more than 0.6; boron 1.0-3.0; Al2O3 - the remaining part, which has pore volume not less than 0.25 cm3/g, specific surface not less than 150 m2/g, average diameter of pores not smaller than 4 nm. Method of catalyst preparation consists in soaking zeolite ZSM-23-containing carrier with boric acid solution with the following drying and calcinations, and further soaking with water solution of palladium nitrate with the following drying and calcinations. Described is process of hydroisomerisation of Diesel fuel, which contains not more than 30 ppm of sulphur, carried out at 320-340°C, pressure 2.5-6.5 MPa, volume rate of raw material supply 2-6 h-1, volume ratio hydrogen/raw material - 200-600 nm3/m3 in presence of catalyst with given above composition.

EFFECT: obtaining catalyst, which makes it possible to carry out process of hydroisomerisation with obtaining Diesel fuels with lower pour point, with high output and cetane number.

12 cl, 2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to oil refining, particularly catalysts for hydroisomerisation of oil stock. The disclosed catalyst includes a hydrogenating metal component on a support comprising zeolite and aluminium oxide. The hydrogenating metal component used is base metals Ni, Mo, W or mixtures thereof and noble metals Pd and Ir, and the zeolite is a mixture of medium-pore zeolite TSVN with a pentasil structure and a wide-pore ultrastable zeolite USY. Content of acidic sites in the disclosed catalyst is in the range of 400-600 mcmol/g. The catalyst further contains a boron oxide or phosphorus oxide promoter. The disclosed catalyst has the following ratio of components, wt %: base metals - 7-12, noble metals - 0.1-1.0; zeolite mixture - 60-70; promoter - 0.5-4.0; aluminium oxide - up to 100. The invention also relates to a method for hydroisomerisation of oil stock in the presence of said catalyst.

EFFECT: disclosed catalyst and method for isomerisation of oil stock using said catalyst enable to obtain high-quality winter and arctic grade diesel fuels with high output.

5 cl, 2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: catalyst comprises a support which is prepared using high-silica zeolite KL and boehmite, and the catalytically active substance is both platinum crystallites immobilised on the surface of the catalyst and platinum particles localised inside the zeolite channel, having size of 0.6-1.2 nm. The boehmite particles have a size of no more than 45 mcm. The zeolite particles have size of no more than 0.2 mm. The ingredients are in the following ratios (wt %): platinum - 0.3-0.8; boehmite - 19.9-59.5; zeolite KL - 79.8-39.7. The catalyst may further include an oxide and/or metal promoter selected from: Sn, In, Ir, Re, Ba. The group of inventions also includes methods of producing catalysts, which include preparing a granular support based on zeolite and aluminium hydroxide and depositing platinum on the support.

EFFECT: improved catalyst.

4 cl, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention deals with two-stage method of obtaining high-octane base gasoline with application of liquid and gaseous hydrocarbon raw material in presence of catalyst, and circulation of nonconverted raw material and hydrocarbon gases. As liquid hydrocarbon raw material used is oil or gas condensate, or their mixture; as gaseous hydrocarbon raw material used is C1-C4 fraction and/or C3-C4 fraction and circulating hydrocarbon gases; liquid hydrocarbon raw material is subjected to fractioning in fractionation column with removal of straight-run fractions with limits of evaporation within the temperature interval C5-75°C, benzene fraction with limits of evaporation within the temperature interval 75-85°C, fraction 85-(160-220)°C and circulating hydrocarbon gases; fraction with limits of evaporation within temperature interval C5-75°C and 85-(160-220)°C are supplied to first stage of contact with zeolite-containing catalyst or system of catalysts, promoted with metals of I-VIII group of Periodic table, benzene fraction with limits of evaporation within the temperature interval 75-85°C is removed from fractionation products. Gaseous hydrocarbon raw material is supplied to second stage of contact; it contacts with zeolite-containing catalyst or system of catalysts, promoted with metals of I-VIII group of Periodic table, and contact in first and second stages takes place with the course of main reactions - isomerisation, aromatisation and hydration, products of contact of first and second stages together undergo stabilisation and fractionation with separation of target product - high-octane base gasoline, evaporating within temperature interval C5-(160-220°C), residue higher than (160-220°C), non-converted raw material, which circulates in first stage raw material, and hydrocarbon gases, which circulate in second stage raw material.

EFFECT: obtaining high-octane base gasoline with improved ecological characteristics.

6 cl, 1 dwg, 2 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to oil refining and petrochemical industry, particularly to methods of producing catalysts for converting straight-run gasoline to a high-octane gasoline component with low benzene content. Described is a catalyst containing the following, wt %: H-ZSM-5 type high-silica zeolite with silica modulus SiO2/Al2O3 = 30-50 - 94.0-99.0, and a heteropoly compound based on cobalt tungstobismuthate or cobalt tungstophosphate 1.0-6.0, formed during heat treatment. Described is a method of producing a catalyst by mechanochemical treatment of the H form a H-ZSM-5 type high-silica zeolite with silica modulus SiO2/Al2O3=30-50 in a vibrating mill for 0.1-24 hours, moulding the catalyst mass into granules, drying and saturating with chloride solutions of corresponding heteropoly compounds of cobalt tungstobismuthate or cobalt tungstophosphate, followed by drying, and the catalyst is formed during heat treatment at 540-550°C for 0.1-12 hours. Described is a method of converting straight-run gasoline to a high-octane gasoline component in the presence of the described catalyst at 350-425°C, bulk speed of 1.0-2.0 h-1 and pressure of 0.1-1.0 MPa.

EFFECT: obtaining an active and selective catalyst for converting straight-run gasoline to a high-octane gasoline component with low benzene content of not more than 2,0 wt %.

3 cl, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention relates to oil refining and petrochemical industry, particularly to methods of producing catalysts for converting a straight-run gasoline fraction into a high-octane gasoline component with low benzene content. Described is a catalyst which contains the following, wt %: H-ZSM-5 type high-silica zeolite with silica modulus SiO2/Al2O3 = 30-50 - 94.0-99.0, cobalt molybdo-bismuthate or molybdo-phosphate 1.0-6.0, formed during heat treatment. Described is a method of producing a catalyst, which involves hydrothermal crystallisation of a reaction mixture at 120-180°C, which contains sources of silicon, aluminium and alkali metal oxides, hexamethylenediamine and water, followed by drying and calcining, mechanochemical treatment in a vibration mill, moulding with further saturation of the H-form of the H-ZSM-5 type high-silica zeolite with silica modulus SiO2/AI2O3=30-50 with chloride solutions of corresponding heteropoly compounds: cobalt molybdo-bismuthate or cobalt molybdo-phosphate, as a modifying additive, followed by mechanochemical treatment in a vibration mill for 0.1-24 hours, moulding the catalyst mass into granules, drying and calcining at 540-550°C for 0.1-12 hours. Described is a method of converting a straight-run gasoline fraction into high-octane gasoline component with low benzene content in the presence of the catalyst described above at 350-425°C, volume rate of 1.0-2.0 h-1 and pressure of 0.1-1.0 MPa.

EFFECT: high activity and selectivity of the catalyst.

3 cl, 1 tbl, 7 ex

FIELD: process engineering.

SUBSTANCE: invention relates to petrochemical and oil processing industries. Zeolite-bearing catalyst comprises zeolite ZSM-5 with silicate module SiO2/Al2O3=30-80 mol/mol, and zeolite structure elements, e.g. niobium oxide and/or molybdenum oxide and/or cobalt oxide, or mixes thereof, and zirconium oxide, at the following ratio of components, wt %: zeolite - 70.00-90.0; ZrO2 - 0-3.00; Nb2O3 - 0-3.00; MoO3 - 0-3.00; CoO - 0-2.00; Na2O - 0.03-0.10, and binder making the rest. Proposed method of producing said catalyst comprises mixing reagents, hydrothermal synthesis, washing, drying and calcination of precipitate. Note here that reaction mix produced by mixing water solutions of aluminium nitrate, sodium hydroxide, silicic acid or KCKG silica gel, niobium pentachloride, zirconium sulphate, molybdenum trioxide, zeolite seed crystals with ZSM-5/MF1 structure in amendment Na- or H-form, for example, butanol-1, monoethanolamine, dibutylamine, diethylentriamine, is loaded into reactor for hydrothermal synthesis at 175-185°C for 8-24 h. Thereafter, pulp of Na-form zeolite is filtered. Obtained precipitate is repulped in water solution of sodium oxide hydrate. Zeolite precipitate is filtered and repulped in water solution of ammonia bicarbonate. Zeolite precipitate is filtered and directed for acid or salt ion exchange by treatment with nitric acid water solution or water solutions of ammonia salts at pulp heating and mixing. Ammonia bicarbonate is added to pulp obtained after said acid or salt ion exchange and filtered out. Washed H- or NH4-zeolite is dried and subjected to preparation of catalyst mass by mixing zeolite powder with active aluminium hydroxide and concentrated nitric acid. Produced catalyst mass is extruded and pelletised. Produced pellets are dried at 150°C and calcined at 550-600°C. Proposed method of converting virgin gasoline fractions into high-octane gasoline with the help of zeolite-bearing catalyst comprises forcing vapors of virgin gasoline fractions through stationary bed of above described catalyst with additional feed of hydrogen into reaction zone.

EFFECT: higher quality and increased yield.

4 cl, 9 tbl, 21 ex

FIELD: chemistry.

SUBSTANCE: invention relates to oil-refining and petrochemical industry and production of catalysts used in conversion of C2-C12 aliphatic hydrocarbons and methanol to high-octane gasoline and aromatic hydrocarbons. Described is a zeolite-containing catalyst for converting C2-C12 aliphatic hydrocarbons and methanol to high-octane gasoline and aromatic hydrocarbons, which contains zeolite ZSM-5 with silica modulus SiO2/Al2O3=40-100 mol/mol and residual content of sodium oxide of 0.02-0.04 wt %, zeolite structural units and a binding component, wherein the zeolite structural units of the catalyst are niobium oxide and iron oxide or a mixture of oxides of said metals and zirconium oxide, and chromium oxide, with the following content of components (wt %): zeolite 65.00-85.00; ZrO2 0-3,00; Nb2O5 0-0.50; Fe2O3 0-1.00; Cr2O3 0-3.00; Na2O 0.02-0.04; binding component - the balance. Described is a method for obtaining a zeolite-containing catalyst, which involves mixing reactants, hydrothermal synthesis, washing, drying and calcining the residue. The reaction mixture obtained by mixing aqueous salt solutions of aluminium, zirconium, niobium, iron, chromium and sodium hydroxide, silica gel, zirconium sulphate, niobium pentachloride, inoculating zeolite crystals with a ZSM-5 structure in Na- or H-form, a structure-forming agent, for example diethylene triamine (bis-(2aminoethyl)amine) is fed into an autoclave, where hydrothermal synthesis is carried out at 160-190°C for 20-80 hours with constant stirring; at the end of hydrothermal synthesis, Na-form pulp of the zeolite is filtered; the obtained residue is washed with tap water and taken for salt ion exchange by treatment with aqueous ammonium chloride solution while heating and stirring the pulp; the pulp obtained from salt ion exchange is filtered, washed with tap water and then washed with dimineralised water to residual sodium oxide content of 0.02-0.04 wt % with respect to the dried and calcined product; the washed residue of the ammonium zeolite form is taken for preparation of the catalyst mass by mixing the ammonium zeolite form with active aluminium hydroxide; the obtained catalyst mass is extruded and granulated; the granules are dried at 100-110°C and calcined at 550-650°C; the calcined granules of the zeolite-containing catalyst are sorted; the fraction of the finished zeolite-containing catalyst is separated, and the fraction of granules smaller than 2.5 mm is ground into homogenous powder and returned to the step of preparing the catalyst mass. Described also is a method of converting C2-C12 aliphatic hydrocarbons and methanol to high-octane gasoline and aromatic hydrocarbons, which involves heating and passing material - vapour of straight-run gasoline fraction of oil or methanol through a fixed bed of the catalyst described above.

EFFECT: achieving high phase purity of the zeolite catalyst and wide distribution of acid sites thereof according to strength, introduction of more than one modifying element into the zeolite structure, high quality and output of end products on the disclosed catalyst.

4 cl, 9 tbl, 15 ex

FIELD: chemistry.

SUBSTANCE: invention relates to heterogeneous catalysts for producing benzene aromatic hydrocarbons. Described is a catalyst for converting methanol for producing benzene aromatic hydrocarbons, which contains decationated pentasil-type zeolite which is modified by mixture of zirconium pyrophosphate, zinc oxide and zirconium dioxide, has molar ratio SiO2/Al2O3 of 120-200 and contains sodium cations in an amount which is equivalent to 0.059-0.010 wt % sodium oxide, formed with binder from a gamma-modification of aluminium oxide and zirconium dioxide, with the following content of components, wt %: 65 (zeolite - 96.5-97.8 with content of modifier of (59 wt % ZrP2O7; 31 wt % ZnO and 10 wt % ZrO2), of 3.5-2.2) and 35 binder, from the sum of anhydrous oxides (γ-aluminium oxide - 80 and zirconium dioxide - 20). Described is a catalyst for producing benzene aromatic hydrocarbons, which contains decationated pentasil-type zeolite which is modified by mixture of copper oxide, zinc oxide and gallium oxide, has molar ratio SiO2/Al2O3 of 120-200 and contains sodium sodium cations in an amount which is equivalent to 0.24-0.11 wt % sodium oxide, formed by binder, with the following content of components, wt %: 65 (zeolite - 93.0-95.0, with content of zeolite modifier of (80 wt % CuO; 13 wt % ZnO and 7 wt % Ga2O3), of 7.0-5.0) and 35 binder, from the sum of anhydrous oxides (γ-aluminium oxide - 80 and zirconium dioxide - 20). Described is a method of producing benzene aromatic hydrocarbons from methanol which involves catalytic conversion of methanol in at least two reactors with different catalysts into a mixture of olefins and water vapour in a first reactor and subsequent conversion of said mixture in a second reactor, cooling the obtained gaseous products, condensation, separation with extraction of light paraffins, water, a mixture of aromatic hydrocarbons and recycling the cooled paraffins through both catalysts while feeding methanol into the first reactor, wherein said methanol conversion catalyst is used in the first reactor when converting methanol to olefins and formation of aromatic hydrocarbons from olefins in the second reactor takes place using said catalyst for producing benzene aromatic hydrocarbons, wherein conversion of methanol to olefins is carried out at temperature of 300-360°C, pressure of not more than 0.5 MPa and methanol mass feed rate of 2-3 h-1, and conversion of olefins in the reactor for formation of aromatic hydrocarbons is carried out at temperature of 450-530°C, pressure of 1.0-2.0 MPa and mass feed rate of methanol conversion products of 1.7-3.0 h-1, and recycling is carried out at a rate of 7 moles paraffins per mole methanol.

EFFECT: reduced amount of light hydrocarbon gases and high content of alkylarenes produced onshore.

9 cl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to field of nanotechnology, in particular to plant growing, and deals with method of obtaining nanocapsules of 6-aminobenzylpurine. Method is characterised by the fact that 6-aminobenzylpurine is used as core and sodium alginate is used as envelope of nanocapsules, obtained by addition of E472c as surfactant to sodium alginate in butanol, portioned addition of 6-aminobenzylpurine into suspension of sodium alginate in butanol and further drop-by-drop introduction of precipitating agent-petroleum ether after formation of separate solid phase in suspension.

EFFECT: simplification and acceleration of process of obtaining nanoparticles and increased output by weight.

3 ex

FIELD: chemistry.

SUBSTANCE: method includes crushing and fractioning of initial material, delignification of initial raw material by alkaline hydration and alkaline pulping with further washings. After that, two-stage acidic hydrolysis with intermediate neutralisation and three washings is performed. Then, three-stage bleaching with hydrogen peroxide H2O2 with three washings is carried out. In second washing finely dispersed ozone is supplied. Obtained product is additionally subjected to homogenisation and drying. Invention makes it possible to obtain final product with virtually absolute absence of lignin, with high organoleptic and physical and chemical properties from lignin-containing initial material.

EFFECT: method does not require application of expensive equipment, does not involve application of highly toxic reagents, includes simple technological operations, is characterised by production scalability.

3 cl, 3 dwg, 1 ex

FIELD: medicine.

SUBSTANCE: invention describes a method for producing Sel-Plex nanocapsules possessing the supramolecular properties by non-solvent addition, characterised by the fact that Sel-Plex is dissolved in dimethyl sulphoxide; the prepared mixture is dispersed in xanthum gum solution used as a nanocapsule shell, in butanol, in the presence of E472c preparation while stirring at 1000 cycles per second; the mixture is added with the precipitator benzol, filtered and dried at room temperature.

EFFECT: simplifying and accelerating the process of nanoencapsulation and ensuring higher weight yield.

4 ex, 12 dwg

FIELD: chemistry.

SUBSTANCE: ceramic membrane, applied for the separation of gas mixtures, has the following composition, wt %: aluminium oxide 30-54; sodium silicate 42-68; carbon nanotubes CNT with an external diameter of 1-5 nm with a three-layer structure and a specific surface of 350-1000 m2/g 1-4. The method of preparing the ceramic membrane for the separation of gas mixtures includes mixing of thermoactivated gibbsite - Al(OH)3 with sodium silicate and the carbon nanotubes CNT with an external diameter of 1-5 nm with the three-layer structure and the specific surface of 350-1000 m2/g, following addition of a nitric acid solution. The obtained mass is thoroughly mixed and an excess of moisture is removed until powder has a half-dry condition. The obtained powder is pressed, the pressed tablets are subjected to thermal-processing - first, they are exposed at a temperature of not higher than 150°C, then at a temperature of not higher than 400°C. The obtained membrane in the form of a tablet is annealed without air access at 850-1100°C.

EFFECT: increased factor of the gas mixture separation.

2 cl, 3 dwg, 2 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention relates to electronics and is intended to design devices which convert the chemical reaction of adsorbed molecules of a fuel gas (vapour) and oxygen (or air) into an electrical signal. The invention can be used to design compact batteries for electronic equipment in the form of single-chamber fuel cells, which consist of a working chamber having a fuel-gas mixture inlet and a gas outlet, inside of which there is a composite film with electrical contacts connected to an external load, the space between which is filled with a conducting material. The conducting material used is a nanocomposite material which consists of a non-conducting polymer film of polypropylene and conducting filler in the form of carbon nanotubes. Concentration of the carbon nanotubes with p-type conductivity is about 0.5-5% near the percolation threshold. The nanocomposite material may contain catalytic nanoparticles of Pt or Pd, or Rh, or Ru. Also disclosed is a method of producing a conducting nanocomposite material, which includes mixing carbon nanotubes and polymer material and then holding the nanocomposite material at external voltage of 4-10 V for 2-30 min in an atmosphere of saturated acetone vapour.

EFFECT: higher current density in the active layer.

7 cl, 3 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medicine and describes a method for producing chondroitin sulphate nanocapsules by non-solvent addition, characterised by the fact that chondroitin sulphate is added in small portions into xanthane gum suspension used as a nanosuspension shell, in butanol containing 0.01 g of the preparation E472 as a surfactant; the produced mixture is stirred and added with the nonsolvent hexane 6ml, filtered, washed in hexane and dried.

EFFECT: invention provides simplifying and accelerating the process of nanoencapsulation in xanthane gum and higher weight yield.

2 ex

FIELD: medicine.

SUBSTANCE: invention represents a method for drug encapsulation by non-solvent addition, wherein according to the invention cores of nanocapsules are vitamins, whereas a shell is sodium carboxymethyl cellulose precipitated from isopropyl alcohol suspension by adding chloroform as a non-solvent and dried at room temperature.

EFFECT: simplifying and accelerating the process of nanoencapsulation, reducing accompanying loss.

7 ex

FIELD: medicine.

SUBSTANCE: invention relates to field of biotechnology. Method of extracting DNA from blood cells is claimed. Magnetic particles and ferromagnetic nanospheres CoNiFe2O4 50 nm are added into sample. Biologic material is lysed. DNA is washed and DNA is taken off from carrier.

EFFECT: preference of claimed method consists in increase of DNA quantity in obtained sample.

3 dwg, 1 ex

FIELD: heating.

SUBSTANCE: invention relates to formation methods of independent self-cooled instruments and elements of electronics, which can operate effectively without using any liquid nitrogen technology and other cryogenic equipment. The formation method of an independent self-cooled nanoinstrument consists in the fact that on a substrate from monocrystalline material with a squid receiver formed on one side there arranged on the reverse side is a heat absorption device that includes a cathode and an anode, which have different Fermi energy of electrons. Then, the substrate is enclosed through an installation hole in a vacuum cover from ceramised glass which contains contact electrodes for two substrate sides. After that, the substrate installation hole is closed with a cover from ceramised glass. This device is arranged in a vacuum chamber in which a target from ceramised glass is arranged as well. Pumping-out to the pressure of 10-1 Pa is performed; the target and the cover from ceramised glass is heated up to 450÷500°C. Then, by means of a laser with wavelength of radiation equal to 1.06 mcm, pulse duration of 10-20 ns and pulse repetition frequency of 10 Hz, power density of 5·108÷8·108 W/cm2 there the target from ceramised glass is sprayed, which is located at the distance of 8÷10 mm from the cover from ceramised glass during 10 minutes.

EFFECT: invention provides creation of such design of a squid (a superconducting quantum interference device), in which the following is excluded: degradation of superconducting properties in the air medium, dependence of achievement of operating temperature on use of liquid nitrogen or other external cryogenic units with large dimensions.

1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to pigments for white paints and coatings, including temperature-control coatings of spacecraft, and can be used in space engineering, in the construction industry and in various industries for temperature control of devices or processing facilities. The pigment for light-reflecting coatings is obtained by heating at 800°C and with a high vaporised and ground mixture of titanium dioxide microparticles with 7 wt % silicon dioxide nanoparticles.

EFFECT: invention enables to obtain a pigment with high radiation resistance using a simple technique which is efficient compared to similar pigments obtained using prior art.

1 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: to realise the method, binder-free granular faujasite with modulus of 5.5-7.0 is treated twice with an aqueous ammonium salt solution with concentration of 25-30 g/dm3 (with respect to NH4+) with the ratio of the mass of the granules (g)/volume of the solution (cm3) of 1/8 to 1/9 and temperature of 60-65°C for 0.5-1.0 h; two to four of said double treatment steps are alternated with heat treatment in a medium of 100% steam, which is fed in ratio of the mass of the granules (g)/mass of steam (g) of 1/0.5 to 1.0/1.0 at temperature of 540-600°C for 2-3 h, and after the last ammonium treatment steps, the granules are washed, dried and calcined. The invention enables to obtain a binder-free granular catalyst for transalkylation of benzene with diethylbenzenes, which consists of 100 wt % type Y zeolite with modulus of 8.0 to 19.5 and Na2O content of 0.5 to 0.1 wt % (degree of substitution of substitution of Na+ ions of 0.95 to 0.99) in acidic H+ form, which provides high conversion of diethylbenzenes (82.5-83.0%) and output of the end product - ethylbenzene (21.0-21.5).

EFFECT: improved properties and high output.

2 cl, 2 tbl, 11 ex

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