Zeolite-containing catalyst, method of producing said catalyst and method of converting straight-run gasoline fraction to high-octane gasoline component with low benzene content

FIELD: chemistry.

SUBSTANCE: invention relates to zeolite-containing catalysts. Described is a zeolite-containing catalyst for converting a straight-run gasoline fraction to a high-octane gasoline component with low benzene content, which contains high-silica zeolite with H-ZSM-5 type high-silica zeolite structure with silica modulus SiO2/Al2O3=30-50, in amount of 97.0-99.0 wt % and a modifying component which is at least one metal from the group: copper, tungsten, molybdenum, which is introduced into the high-silica zeolite in form of nanopowder of said metals in amount of 1.0-3.0 wt %; the catalyst is formed during thermal treatment. Described is a method of producing said catalyst, characterised by that the H-ZSM-5 type high-silica zeolite with silica modulus SiO2/Al2O3=30-50 is obtained via hydrothermal crystallisation of the reaction mixture at 120-180°C for 1-6 days, which contains sources of silicon oxide, aluminium oxide, alkali metal oxide, hexamethylene diamine and water, with further mixing of a high-silica zeolite with metal nanopowder obtained by electric blasting the wire of the metal in a medium of argon, followed by mechanochemical treatment, moulding the catalyst mass, drying and calcination. Described is a method of converting a straight-run gasoline fraction to a high-octane gasoline component with low content of benzene in the presence of the catalyst described above, wherein the conversion process is carried out at 350-425°C, volume rate of 1.0-2.0 h-1 and pressure 0.1-1.0 MPa.

EFFECT: high activity and selectivity of the catalyst.

4 cl, 1 tbl, 6 ex

 

The invention relates to the refining and petrochemical industries, in particular to methods of producing catalysts for the conversion of aliphatic hydrocarbons With2÷12in a high-octane component of gasoline with a low benzene content.

The main industrial process of producing high octane gasoline and aromatic hydrocarbons is catalytic reforming of straight-run gasoline fractions, which is held at high temperatures 450÷550°C, the high pressure of 0.1÷3,5 MPa and a hydrogen-containing gas. Disadvantages of the process of catalytic reforming of straight-run gasolines are the use of expensive Pt-containing catalyst, the hydrogen-containing gas and a high content of benzene and aromatic hydrocarbons in the reaction products.

There is a method of preparation of the catalyst for oligomerization and aromatization of low molecular weight hydrocarbon, C2÷C12containing zeolite family pentasil with silicate module SiO2/Al2O3=20÷80, modified zinc oxide, platinum, and boron oxide, the binder is alumina (U.S. Pat. RU # 2144845, B01J 29/44, C10G 35/095, 1998).

The disadvantages of this catalyst are the use of expensive Pt-modifier and low yield of 34.7 wt.% the liquid products of the reaction prevremeni the NGL at 600°C.

A known method of producing a catalyst for the conversion of low molecular weight hydrocarbons into high octane gasoline or aromatic hydrocarbons containing zeolite family pentasil with silicate module SiO2/Al2O3=20÷80, modified zinc oxide, platinum and phosphorus oxide, the binder is alumina (U.S. Pat. RU # 2144846, B01J 29/44, C10G 35/095, 1998).

The disadvantages of this catalyst are the use of expensive Pt-modifier and a low output to 54.2 wt.% liquid products of the reaction of conversion of NGL at 600°C.

The known method of producing high octane gasoline low benzene content of raw materials, including catalytic reforming gasoline raw materials to produce catalyzate, the selection of catalyzate hydrogen-containing gas and the selection received from the unstable product of reforming high-octane gasoline and gas stabilization (U.S. Pat. RU # 2213124, C10G 35/095, 59/02, 2002).

Then, from high-octane catalyzate produce a gasoline fraction containing more than 5.0 wt.% benzene and aliphatic hydrocarbons, and is carried out by contact with a catalyst comprising a group zeolite, in the conditions of formation of aromatic hydrocarbons from aliphatic components fractions and converting at least part of the benzene, and the resulting product is mixed with an unstable product p is of forminga.

The disadvantages of this method are the multistage and the complexity of the process of producing high octane gasoline.

Known zeolite catalyst and method of turning straight-run gasoline fractions of crude oil into high-octane component of gasoline (U.S. Pat. RU # 2323778, B01J 29/42, 2006). The catalyst contains high-silica zeolite with a molar ratio of SiO2/Al2O3=60 residual contents of Na2O not more than 0.02 wt.%, modified metals Pt, Ni, Zn or Fe, which are included in the catalyst composition in the form of nano-sized powders and their content is not more than 1.5 wt.%.

The way to turn gasoline fractions of crude oil into high-octane component of gasoline is carried out by contact of them with the catalyst at 300÷400°C, atmospheric pressure and the load of the catalyst raw materials 2,0 h-1.

The disadvantage of this method is the high content of aromatic hydrocarbons in catalyzate.

The closest to the essence of the technical solution is the catalyst for the conversion of aliphatic hydrocarbons, C2÷C12, method thereof and method of conversion of aliphatic hydrocarbons With2÷12in high-octane gasoline and/or aromatic hydrocarbons adopted for the prototype (U.S. Pat. RU # 2235590, 7 B01J 29/46, 2003). The catalyst contains telesolutions with what ructural zeolite ZSM-5 with silicate module SiO 2/Al2O3=20÷160, SiO2/Fe2O3=30÷5000, which is obtained by the hydrothermal crystallization of a reaction mixture at 120-180°C for 1-6 days, containing sources of silicon oxide, aluminum oxide, alkali metal oxide, and hexamethylenediamine were water, with further mixing zhelezohromovye with compounds of modifying metals, hardening additives and a binder, followed by mechanochemical processing, forming the catalyst mass, drying and calcining. As the modifying component contains at least one oxide of an element selected from the group of copper, zinc, gallium, lanthanum, molybdenum, rhenium in an amount of 0.1 to 10.0 wt.%.

The method of transformation of aliphatic hydrocarbons2÷12in high-octane gasoline and/or aromatic hydrocarbons in the presence of a catalyst is carried out at 300÷550°C, flow rate of 0.5÷5,0 h-1and a pressure of 0.1÷1.5 MPa.

The disadvantage of the method adopted for the prototype, is the high content of benzene and aromatic hydrocarbons in catalyzate.

The objective of the invention is the obtaining of an active and selective catalyst for the conversion process straight-run gasoline fractions in high-octane component of gasoline with a low benzene content.

The technical result is achieved by the fact that the proposed zeolite-containing catalyst to the version of straight-run gasoline fraction in a high-octane component of gasoline with a low content of benzene and get a dry mixture of N-forms high-type zeolite H-ZSM-5 with silicate module SiO 2/Al2O3=30÷50 with nanoscale powders of metals, as a modifier metal, at least one from the group: copper, tungsten, molybdenum in an amount 1,0÷3,0 wt.%, obtained by the method of electrical explosion of wire metal inert gas argon, followed by mechanochemical processing in a vibrating mill for 0.1÷24 h, forming the catalyst mass into pellets, drying at 100÷110°C for 2÷4 h and the catalyst formed during the heat treatment at 550÷600°C for 0.1÷12 o'clock

High-silica type zeolite H-ZSM-5 with silicate module SiO2/Al2O3=30÷50 receive the hydrothermal crystallization of a reaction mixture at 120÷180°C for 1÷6 days, containing sources of silicon oxide, aluminum oxide, alkali metal oxide, and hexamethylenediamine were water.

Under the action of mechanical and high-temperature treatment of the mixture of zeolite with nanoscale powders of metals is the modification of the high zeolite H-ZSM-5 active components, the formation and the formation of active and selective catalyst.

The invention is illustrated by the following examples.

Example 1 (the prototype). To 200 g of water glass (29% SiO2, 9% Na2O 62% N2O) was added with stirring to 11.8 g of diamine (R) in 100 ml of N2Oh, 24,15 g of Al(NO3 )3·N2About 160 ml of N2About 1 g of "seed" high zeolite and poured 0.1 N. the solution NHO3. The resulting mixture was loaded into an autoclave of stainless steel, is heated to 175÷180°C and maintained under stirring 2÷6 days, and then cooled. The synthesized product is washed with water, dried and calcined at 550-600°C 12 hours To transfer in the H-form zeolites decationized processing 25% solution of NH4Cl (10 ml per 1 g of zeolite) at 90°C for 2 hours, then washed with water, dried at 110°C and calcined at 540°C 6 o'clock Get H-ZSM-5 with silicate module SiO2/Al2O3=30, the degree of crystallinity of the product is 96%.

Then 10 g of H-ZSM-5 with silicate module SiO2/Al2O3=30 is subjected to mechanochemical treatment in a vibrating mill for 8 h, then the catalyst mass is formed into pellets, dried 2 h at 20-30°C, then at 110°C for 3-4 h and calcined for 8 h at 550-600°C.

Example 2. H-ZSM-5 with silicate module SiO2/Al2O3=50 receives the same way as in example 1, but instead 24,15 g of Al(NO3)3·N2About take 14,475 g of Al(NO3)3·9H2O.

Then to 9.9 g of H-ZSM-5 with silicate module SiO2/Al2O3=50 mixed with 0.1 g of nanosized powder (APCS) Mo and subjected to mechanochemical treatment in a vibrating mill for 4 hours Obtained catalyst mass is formed into pellets, dried for 2H at 110°C and calcined for 8 h at 550÷600°C.

The obtained zeolite catalyst has a composition, wt.%:

H-ZSM-5 (SiO2/Al2O3=50)99,0
Mo1,0

Example 3. In the same way as in example 2, take the 9.7 g of H-ZSM-5 with silicate module SiO2/Al2O3=50 and mixed with 0.3 g PPR Mo, then subjected to mechanochemical treatment in a vibrating mill for 4 hours Obtained catalyst mass is formed into pellets, dried 2 h at 110°C and calcined for 8 h at 550÷600°C.

The obtained zeolite catalyst has a composition, wt.%:

H-ZSM-5 (SiO2/Al2O3=50)97,0
Mo3,0

Example 4. In the same way as in example 2 to 9.9 g of H-ZSM-5 with a silica modulus of SiO2/Al2O3=50 mixed with 0.1 g of NFP W and subjected to mechanochemical treatment in a vibrating mill for 4 hours Obtained catalyst mass is formed into pellets, dried 2 h at 110°C and calcined for 8 h at 550-600°C.

The obtained zeolite catalyst has a composition, wt.%:

H-ZSM-5 (SiO2/Al2O3=50) 99,0
W1,0

Example 5. In the same way as in example 2, take the 9.7 g of H-ZSM-5 with silicate module SiO2/Al2O3=50 and mixed with 0.3 g of NFP W, then subjected to mechanochemical treatment in a vibrating mill for 4 hours Obtained catalyst mass is formed into pellets, dried 2 h at 110°C and calcined for 8 h at 550÷600°C.

The obtained zeolite catalyst has a composition, wt.%:

H-ZSM-5 (SiO2/Al2O3=50)97,0
W3,0

Example 6. In the same way as in example 2 to 9.9 g of H-ZSM-5 with silicate module SiO2/Al2O3=50 mixed with 0.1 g Cu APC and subjected to mechanochemical treatment in a vibrating mill for 4 hours Obtained catalyst mass is formed into pellets, dried 2 h at 110°C and calcined for 8 h at 550÷600°C.

The obtained zeolite catalyst has a composition, wt.%:

H-ZSM-5 (SiO2/Al2O3=50)99,0
Cu1,0

The resulting catalysts are experiencing in the process of conversion of aliphatic hydrocarbons (straight-Ben is inovas fraction 40÷185°C) in high-octane component of gasoline and aromatic hydrocarbons on an automated installation flow-type fixed bed of the catalyst at temperatures of 350÷425°C, space velocity of the raw materials 1,0-2,0 h-1and a pressure of 0.1÷1.0 MPa.

In the process of conversion of a mixture of aliphatic hydrocarbons (straight-run gasoline fraction 40÷185°C) with increasing reaction temperature from 350 to 425°C for the high-type zeolite H-ZSM-5 reactions proceed cracking, dehydrogenation, isomerization, dehydrocyclization and paraffin aromatization of hydrocarbons from the formation mainly in the first stages of the process of olefinic hydrocarbons, which later turn into isoparaffin and alkylaromatic hydrocarbons. Introduction to high-silica type zeolite H-ZSM-5 modifying additives in the form of nanosized powders of metals from the group of copper, molybdenum, tungsten in an amount 1,0÷3,0 wt.% allows to considerably increase the output of high-octane component of gasoline, the selectivity of the formation of alkylaromatic hydrocarbons and reduce the yield of benzene and 1.0÷2.0 wt.% from straight-run gasoline fractions, compared with non-modified zeolite.

The table below shows examples clarify the invention without limiting it.

As can be seen from the examples of catalysts 1÷6 table catalysts 2÷6 have a higher output (59÷78%) of liquid products of the reaction is high - octane gasoline from straight-run gasoline fractions than the catalyst according to the prior art (example 1).

Thus, we offer the e catalysts for the conversion of aliphatic hydrocarbons of straight-run gasoline fraction in a high-octane component of gasoline gasoline and aromatic hydrocarbons on the basis of high-type zeolite H-ZSM-5 with silicate module SiO2/Al2O3=30-50 and modified nanosized powders of metals, at least one metal from the group: copper, molybdenum, tungsten in an amount 1,0÷3,0 wt.% allow to increase the output of high-octane gasoline to 60÷78% and the selectivity of the formation of alkylaromatic hydrocarbons from aliphatic hydrocarbons of straight-run gasoline fraction 40÷185°C and lower benzene content in catalyzate to 1.0÷2.0 wt.%.

Preliminary mechanical activation of a mixture of the starting components can significantly reduce the temperature of formation of the active components and to obtain highly dispersed, active and selective catalyst. Introduction to zeolite modifiers in the form of nanosized metal powders in an amount 1,0÷3,0 wt.%, received by way of electrical explosion of wire metal, allows to increase the output of high-octane gasoline to 60÷78% and the selectivity of the formation of alkylaromatic hydrocarbons from aliphatic hydrocarbons of straight-run gasoline fraction.

A method of obtaining a high-octane component of gasoline with a low content of benzene from straight-run gasoline fraction in the presence of catalysts based on high-type zeolite H-ZSM-5 with silicate module SiO2/Al2O3=30÷50 and the modified at least one of nanoers Arnim powder metal from the group: copper, molybdenum tungsten in an amount 1,0÷3,0 wt.% allow to increase the output of high-octane gasoline and the selectivity of the formation of alkylaromatic hydrocarbons from aliphatic hydrocarbons of straight-run gasoline fraction 40÷185°C, than in the presence of the catalyst according to the prior art (example 1).

td align="center"> 21,6

1. Zeolite-containing catalyst for the conversion of straight-run gasoline fraction in a high-octane component of gasoline with a low content of benzene, characterized in that it contains a high-silica type zeolite H-ZSM-5 with silicate module SiO2/Al2O3=30÷50, as modifying component contains a metal, at least one from the group: copper, tungsten, molybdenum, introduced in high-silica zeolite in the form of nanosized powders of metals, in an amount 1,0÷3,0 wt.%; the catalyst formed during the heat treatment and has the following composition, wt.%:

The conversion of straight-run gasoline fraction 40÷185°C on zeolite catalysts
An example of catalyst No.Tp, °CVabout, h-1The product yield, wt.%The estimated octane number, IT
the gas phasethe liquid phasebenzenearena
1 (prototype Pat. RU # 2235590)3502,034,965,11,221,892,3
3752,036,863,2 1,523,494,7
4002,042,957,12,826,795,5
4252,045,154,93,631,596,5
23502,022,277,80,817,691,9
3752,030,469,61,423,194,4
4002,037,362,71,827,7for 95.2
4252,041,858,22,0 32,796,8
33502,020,479,60,816,091,0
3501,035,164,91,322,792,9
3752,026,473,61,121,692,2
4002,030,969,11,522,7of 92.7
4252,033,966,11,923,594,6
43502,032,567,51,3to 92.1
3752,041,258,81,827,694,3
4002,046,653,42,031,996,0
4252,049,5a 50.52,0to 33.896,6
53502,035,065,01,322,592,5
3752,0of 40.359,71,926,593,6
4002,041,1of 58.92,032,6 96,7
4252,0to 49.950,12,034,4to 97.1
63502,09,290,80,49,685,7
3752,013,586,50,412,5of 87.3
4002,020,080,00,715,489,3
4252,024,8to 75.21,016,990,1
4251,034,665,41,626,693,7
High-silica type zeolite H-ZSM-5
with silicate module
SiO2/Al2O3=30÷5097,0÷99,0
Nanosized powders of metals from groups:
copper, molybdenum, Wolfram0,1÷3,0

2. A method of obtaining a zeolite-containing catalyst according to claim 1, characterized in that the high-silica type zeolite H-ZSM-5 with silicate module SiO2/Al2O3=30÷50 receive hydrothermal crystallization of reactio the Noah mixture at 120÷180°C for 1÷6 days, containing sources of silicon oxide, aluminum oxide, alkali metal oxide, and hexamethylenediamine were water, with further mixing high zeolite with nanoscale metal powders obtained by electrical explosion of wire metal inert gas argon, followed by mechanochemical processing, forming the catalyst mass, drying and calcining.

3. A method of obtaining a zeolite-containing catalyst according to claim 2, characterized in that the catalyst was prepared by dry mixing the high-type zeolite H-ZSM-5 modifying nanosized metal powders, followed by mechanochemical processing in a vibrating mill for 0.1 to 12 hours, forming the catalyst mass, drying at 100÷110°C for 2-4 h and calcining at 550÷600°C 8-12 hours

4. The method of conversion of straight-run gasoline fraction in a high-octane component of gasoline with a low content of benzene in the presence of a catalyst, characterized in that the use of the catalyst according to claim 1 and the process of conversion of straight-run gasoline fraction in a high-octane component of gasoline with a low content of benzene is carried out at 350÷425°C, flow rate 1,0-2,0 h-1and a pressure of 0.1÷1.0 MPa.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: invention refers to processing of various oil raw materials, and namely gas condensates and oil distillates with end boiling point of not more than 400°C to high-octane gasolines, diesel fuel of A grade or fuel for jet engines. The description of processing method of hydrocarbon raw material to gasoline with end boiling point of not more than 195°C and octane number of not less than 83 points as per motor method, as well as motors is provided, which consists in conversion of hydrocarbon raw material in presence of porous catalyst at temperature of 250-500°C, pressure of not more than 2.5 MPa, mass flows of raw material of not more than 10 p-1. As initial raw material there used are hydrocarbon distillates of various origin with end boiling point of not more than 400°C and separated into three fractions: nk-180, 180-280 and 280-kk°C; then, mixture of two fractions nk-180°C and 280-kk°C is subject to catalytic processing, and fraction separated from products of catalytic processing in the reactor at the outlet of which the products are cooled and separated in separator into gas phase and mixture of motor fuels, dispersed into gasoline and diesel fraction; at that, diesel faction is compounded with the third 180-280°C fraction.

EFFECT: increasing the output of diesel fuel or fuel for jet engines.

8 cl, 12 ex, 2 tbl

FIELD: oil and gas industry.

SUBSTANCE: invention refers to the method for obtaining high-octane petroleum component involving the isomerisation stage of petroleum fractions in isomerisation reactor, cooling, and separation of products; at that, conversion process of hydrocarbons of petroleum fraction to high-octane petroleum component is performed in the reactor on platinised zeolite-containing catalyst on the basis of BETA zeolite or dealuminised mordenite containing 0.5% of platinum without hydrogen medium.

EFFECT: obtaining high-octane petroleum component enriched with isoparaffins.

1 ex, 3 tbl

FIELD: process engineering.

SUBSTANCE: this invention relates to reductive isomerisation catalyst, dewaxing of mineral oil, method of producing base oil and lubrication base oil. Invention covers reductive isomerisation catalyst. Reductive isomerisation comprises molecular sieve treated by ionic exchange or its calcinated material produced by ionic exchange of molecular sieve containing cationic fragments and using water as the primary solvent, and at least one metal selected from the group consisting of metals belonging to group VIII-X of periodic system, molybdenum and tungsten applied onto molecular sieve treated by ionic exchange, or onto its calcinated material. Dewaxing comprises converting portion of or all normal paraffins into isoparaffins whereat mineral oil containing normal paraffins is brought in contact with abode described reductive isomerisation catalyst in the presence of hydrogen. Invention covers also method of producing lubricant base oil and/or fuel base oil implemented by bringing base oil containing normal paraffins in contact isomerisation catalyst in the presence of hydrogen. Invention covers also method of producing lubricant base oil containing normal paraffins, including 10 or more carbon atoms by bringing it in contact with above describe reductive isomerisation catalyst in the presence of hydrogen in conversion of normal paraffins making in fact 100%.

EFFECT: catalyst with high isomerisation activity and sufficiently low cracking activity at high yield.

22 cl, 8 tbl, 4 ex, 11 dwg

FIELD: chemistry.

SUBSTANCE: described is a catalyst for producing high-octane gasoline with low content of benzene via combined treatment of low-octane hydrocarbon fractions with initial boiling point - 205°C and aliphatic alcohols and/or dimethyl ether, which contains a mechanical mixture of pentasil type zeolite with silica modulus SiO2/Al2O3=18-25 which is first treated with aqueous solution of an alkali, modified with rare-earth metal or lanthanum oxide in amount of 0.5-2.0 wt % and a pentasil type zeolite with silica modulus SiO2/Al2O3=70-90, modified with magnesium oxide in amount of 0.5-3.0 wt %, taken in ratio from 1/1 to 1/5, as well as binder in amount of 20 to 25% of the weight of the catalyst. Described also is a method of producing high-octane gasoline with low content of benzene via combined treatment of low-octane hydrocarbon fractions with initial boiling point - 205°C and aliphatic alcohols and/or dimethyl ether, in which the catalyst described above is heated in an isothermic reactor with heat pipes to temperature 280-350°C, the process of contacting the raw material with the catalyst, which is heated in the isothermic reactor with heat pipes, takes place at pressure 0.1-1 MPa while feeding into the reactor in two streams a mixture of methanol as oxygen-containing raw material and low-octane hydrocarbon fractions with volume rate of feeding the liquid raw material equal to 0.5-5 h-1 after evaporation of the raw material in a pre-heater.

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7 cl, 3 tbl, 17 ex

FIELD: oil and gas production.

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EFFECT: reduced time for processing gas condensate due to reduced process of regeneration of coked catalyst and reduced expenditures for regeneration process.

3 cl, 1 tbl, 4 ex

FIELD: oil and gas industry.

SUBSTANCE: invention refers to method for obtaining high-octane benzene and/or aromatic hydrocarbons with low benzene content from hydrocarbon raw material, namely aliphatic hydrocarbons C5-C12 or aliphatic oxygen-containing compounds C1-C12, including in composition of basic products and by-products in oil, gas, chemical industry; phase of raw material contact in the first reaction zone is conducted at temperature of 400-600°C, pressure of 0.1-4.0 MPa and mass raw material supply rate of 1 -200 h-1 with aromatisation catalyst on the basis of modified zeolite of MFI structural type which is characterised with value of molar ratio SiO2/Al2O3 20-133, residual content of sodium ions of less than 0.1 %, which is treated in addition with 0.01-2.0 "н" solution of ammonium fluoride. Obtained reaction flow is subject to contact in the second reaction zone at temperature of 300-400°C, pressure of 0.1-4.0 MPa and mass raw material supply rate of 1-40 h-1 with catalyst of alkylation and/or transalkylation; at that, flow temperature at the inlet to the second reaction zone is not less than by 70°C lower than flow temperature at the inlet to the first reaction zone.

EFFECT: higher capacity of the process and output of gasoline.

7 cl, 24 ex, 3 tbl

FIELD: oil and gas production.

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EFFECT: processing wide range of hydrocarbon containing stock into high octane benzine; increased efficiency of process.

6 cl, 19 ex, 7 tbl, 2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to method of producing aromatic hydrocarbon compounds from light hydrocarbons by catalytic reaction of ring formation and to catalyst to this end. Zeolite-containing compacted catalyst, to be used in method of producing aromatic hydrocarbon compounds from light hydrocarbons by catalytic reaction of ring formation, wherein zeolite contained in zeolite-containing compacted catalyst meets the following requirements: (a) zeolite represents that with average diametre of pores varying from 5 to 6.5 Å; (b) zeolite features diametre of primary particle varying from 0.02 to 0.25 mcm; and (c) zeolite comprises at least one metal element selected from the group consisting of metals from IB-group of periodic system in the form of appropriate cations, and wherein zeolite-containing compacted catalyst comprises at least one element selected from the group made up of elements that belong in IB, IIB, IIIB, VIII groups of periodic system.

EFFECT: lower carburisation and reactivation of catalyst.

6 cl, 4 ex, 6 tbl, 5 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to oil refining and petrochemical industries and is aimed at preparing catalysts used in processing petroleum cuts and gas condensates into engine fuel. The zeolite-containing catalyst for preparing engine fuel from petroleum cuts and gas condensates contains a pentasil ZSM-5 zeolite with silica module SiO2/Al2O3=20-80 mol/mol and residual content of sodium oxide 0.02-0.05 wt %, bismuth oxide as a structure element of the zeolite component with the following content of components (wt %): zeolite 70.00-85.00; Bi2O3 1.0-6.00; Na2O 0.02-0.05; binding component - the rest. The method of preparing the zeolite-containing catalyst involves hydrothermal synthesis of Na-forms of zeolite with subsequent salt ion exchange and obtaining an ammonium form of zeolite, after which a catalyst mass is prepared which is then granulated, dried and annealed at temperature 550-650°C. The method of preparing engine fuel from petroleum cuts and gas condensates involves passing vapour of petroleum cuts and gas condensates through a fixed bed of zeolite catalyst heated to temperature 300-440°C, with catalyst material loading of 2 h-1.

EFFECT: reduced number of components and stages for synthesis of zeolite-containing catalyst, increased degree of converting raw material, quality and output of end products on the proposed catalyst, reduced number of stages for processing hydrocarbon material into the end product.

3 cl, 6 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to catalysts and methods of producing high-octane petrol or aromatic hydrocarbons. A catalyst is described for converting aliphatic C2-C12 hydrocarbons and/or aliphatic oxygen-containing C1-C12 compounds to high-octane petrol or aromatic hydrocarbons, containing pentasil type zeolite, zinc aromatisation promoter, and binder, where the said zeolite is characterised by molar ratio SiO2/A2O3 ranging from 20 to 100, residual content of sodium ions less than 0.1%, aromatisation promoter is introduced using any known method with the following ratio of components: zeolite - 30.0 to 90.0 wt %; zinc - 0.5 to 8.0 wt %; binder - the rest. The catalyst is further treated with ammonium fluoride solution after introduction of zinc. A method is also described for producing this catalyst, involving introduction of pentasil type zeolite and zinc aromatisation promoter into the catalyst, moulding with the binder, subsequent drying and thermal treatment of the catalyst mass, where the zeolite used is pentasil with molar ratio SiO2/AlO3 ranging from 20 to 100 and residual content of sodium ions less than 0.1%. The aromatisation promoter is introduced using any known method in amount ranging from 0.5 to 8.0 wt %, and the obtained zinc-containing catalyst is further treated with aqueous solution of ammonium fluoride. Also described is a method of producing high-octane petrol or aromatic hydrocarbons by converting hydrocarbon material, involving supply of the material and bringing it into contact with heated zeolite-containing catalyst at high pressure with subsequent extraction of reaction products. The hydrocarbon material used is aliphatic C2-C12 hydrocarbons and/or aliphatic oxygen-containing C1-C12 compounds, including as part of main- and by-products of oil, gas and chemical industry, as the catalyst used is the one described above.

EFFECT: design of highly-active and stable catalyst, which provides for processing a wide range of hydrocarbon material.

16 cl, 4 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to catalysts for low-temperature oxidation of carbon monoxide (CO), a method of producing said catalysts and a method of oxidising CO in order to protect the environment from CO pollution. The catalyst for oxidising carbon monoxide is a Pd/C-K composition, where: C is a mesoporous carbon material obtained via carbonisation of rice husks, K is kaolin which contains aluminium, silicon, titanium, iron and calcium oxides. The catalyst is made by saturating a nanocomposite carbon-containing support with an alcohol solution containing palladium nitrate with palladium content 2-5%,said support having the following texture characteristics: SBET=450-470 m2/g, Vpor=0.5-0.6 cm3/g, dpor=3.3-3.5 nm. The carbon-containing support is made through carbonisation of rice husks in a reactor with a copper-chromium catalyst fluidised-bed at temperature 450-470°C, through activation thereof with KCO3 at temperature 850-900°C and then mixing with kaolin in weight ratio 2/3-1/1 and with water and then moulding. Carbon monoxide is oxidised in the presence or absence of water in a reaction mixture and the catalyst described above.

EFFECT: complete oxidation of carbon monoxide CO at room temperature and suitable moisture content.

9 cl, 7 dwg, 7 ex

FIELD: process engineering.

SUBSTANCE: invention relates to micro structure technologies. Method of producing membrane filter with pore identical sizes and shape comprises irradiating polymer film and etching of material destruction products from polymer film irradiated areas. Irradiation causes local chemical destruction of polymer film material. Polymer film is subjected to synchrotron radiation. Said radiation is structurally ordered by multi-beam lattice interference lithography. Irradiation is carried out in chamber filled with gaseous hydrogen. Hydrogen reacts photochemically with polymer film material on irradiated film sections to produce volatile products removed in irradiation.

EFFECT: membrane filter porosity of up to 0,6, ordered identical-size (from 1 nm and lather) pores, round or elliptical in crosswise and conical in lengthwise sections.

14 cl, 15 dwg, 5 tbl

FIELD: medicine, pharmaceutics.

SUBSTANCE: invention refers to antimicrobial agents exhibiting antibacterial activity with respect to test cultures of gram-positive and gram-negative microorganisms which represent copper nanoparticles and copper oxide nanoparticles. The antimicrobial agents according the invention are characterised by specific particle sizes and phase compositions. The nanoparticles have the size of 33.8-103 nm and contain 67-96% of copper and 4-33% of CuO. The copper oxide nanoparticles have the sizes of 77-124 nm and contain 3.3-23% of crystalline copper, 27.1-90% of CuO and 9.05-69.5% of Cu2O.

EFFECT: invention provides preparing the antimicrobial agents which when introduced in the composition of non-woven linen ensure its antibacterial properties, as well as maintain its aesthetic and service characteristics.

2 cl, 8 dwg, 12 tbl, 6 ex

FIELD: physics.

SUBSTANCE: apparatus includes a scanning probe microscope, at least one scanning device, an object holder and at least one apparatus for processing and transmitting electrical signals. The scanning device is in form of a cantilever mounted on a base, which can turn about its longitudinal axis and the vertical axis of the base. At the end of the cantilever there is a head with at least one holder which is in form of a cantilever, on the free end of which there is a multifunctional unit with at least one scanning element. The apparatus is additionally fitted with at least one collecting tray for cassettes with scanning elements, at least one collecting tray for the multifunctional units and a vacuum tweezer.

EFFECT: versatility of the device, wider range of dimensions of analysed objects and easier use.

9 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to nanotechnology and specifically to polymer composite materials with nanofiller material. The method of producing polymer nanocomposite involves mixing thermoplastic with nanofiller - detonation synthesis nanodiamonds (DND) in molten thermoplastic in elastic instability conditions. To this end, the selected temperature and shearing stress ensure Weissenberg number of not less than 10. The components are in the following ratio, wt %: thermoplastic 95-99.5, DND 0.5-5.

EFFECT: invention enables to obtain a polymer nanocomposite with high modulus of elasticity, hardness, impact strength and breaking strength.

2 ex, 7 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to physico-chemical processes for processing inorganic materials. Powdered detonation nanodiamonds are treated with haloid acid at temperature 50-130°C for 1-10 hours with simultaneous exposure to ultrasound. The treated powder is washed in deionised water, dried and annealed in air at temperature 400-450°C for 1-6 hours. After ultrasonic exposure, the suspension of detonation nanodiamonds is centrifuged at acceleration of not less than 12000 g for 0.5-1.0 hours.

EFFECT: invention enables to obtain an impurity-free, stable monodispersed aqueous suspension of detonation nanodiamonds with particle size of 3,9-5,6 nm.

2 dwg, 15 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering and specifically to synthesis of novel compounds through self-propagating high-temperature synthesis. The method for intercalation of fullerene C60 crystals with caesium is realised at temperature 650°C and pressure 10-5 Pa for 2 s while heating to reaction temperature at a rate of 350°C/s, and then cooling the reaction product to room temperature at a rate of 500°C/s.

EFFECT: intercalation of fullerene C60 crystals with caesium at a high heating rate without decomposition of fullerene.

1 dwg, 1 ex

FIELD: nanotechnologies.

SUBSTANCE: invention is related to nanotechnology. Carbon nanotubes are produced. The carbon-containing substance is represented by anthracite, coking coal, schungite, coke, charcoal or their mixture. The carbon-containing substance is ground in a mill 1. Then the produced powder is mixed in a prechamber 2 with a flow of inert gas. The produced two-phase mixture is sent through nozzles 5. The two-phase flow produced after interaction of colliding jets is separated in a separator 7, filtered in a filter 8. The carbon nanotubes collected in a collector 9 are classified by size and fractions.

EFFECT: invention will make it possible to increase quality of carbon nanotubes.

1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to methods of preparing electrocatalysts. Described is a method of preparing platinum-ruthenium electrocatalysts which are finely dispersed platinum-ruthenium alloy nanoparticles with atomic ratio of metals from 1:4 to 4:1 with total content thereof on a support from 15 to 70 wt %, said nanoparticles being deposited on the surface of a porous carbon support and said method involving co-deposition of hydroxo-chloride complexes of platinum and ruthenium on the surface of the carbon support with neutralisation of suspension thereof in aqueous solution of H2PtCl6 and RuCl3 to pH=5.5-7.0 via gradual addition of an alkaline agent for more than 40 minutes, with moderate heating to temperature 55-70°C, followed by ageing the adsorbed metal compounds at pH=5.5-7.0, partial liquid-phase reduction thereof with an organic reducing agent and final gas-phase reduction in a hydrogen current at 150-250°C.

EFFECT: highly active electrocatalyst is obtained.

2 cl, 6 tbl, 1 dwg, 21 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing concentrates of nanodispersions of zerovalent metals such as silver, gold, copper, palladium, platinum and mercury, which have antiseptic properties. Said method involves mixing a solution of a soluble metal salt in a solvent with ammonia to obtain a complex which is then mixed with alkalnolamine to form a solution. The obtained solution is mixed with a solution of a polymer stabiliser to obtain a stabilised metal cation which is then reduced by adding to the solution an organic or inorganic reducing agent to form a stable dispersion of metal nanoparticles. The disclosed method is realised at a defined ratio of components for 10-60 minutes in an air atmosphere at temperature of up to 100°C.

EFFECT: invention is aimed at obtaining metal dispersions with high sedimentation and chemical resistance and high antiseptic power, which are compatible with a physiological NaCl solution; the method also cuts duration of synthesis and considerably simplifies the process, increases efficiency and complete conversion of cationic metal into a zerovalent metal.

38 cl, 3 tbl, 104 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a catalyst for steam reforming hydrocarbons and preparation method thereof. Described is a catalyst for steam reforming hydrocarbons, which contains nickel, titanium, boron, manganese, lanthanum and aluminium oxides, with the following content of components, wt %: nickel oxide 8.5-24.5; titanium oxide 0.05-2.1; boron oxide 0.1- 3.0; manganese oxide 0.01-2.8; lanthanum oxide 0.1-5.0; caesium oxide 0.1-2.0, aluminium oxide - the rest. Described is also a method of producing the catalyst by preparing a mixture containing alumina, titanium oxide, boric acid, manganese oxide, lanthanum oxide, caesium oxide, adding binder containing paraffin, wax and oleic acid, moulding a support in form of granules via slip casting at excess pressure 0.4-2 MPa at temperature 70-80°, curing in air and calcining the obtained support in two steps: calcining in ceramic moulds in a layer of alumina at temperature 1100-1200°C for 4-8 hours, followed by raising the temperature for one hour to temperature 1350-1420°C and calcining at given temperature for 2-4 hours. After calcining, the support is saturated with a solution of nickel, aluminium and/or lanthanum and caesium nitrates, drying and calcination of the catalyst mass at 400-500°C.

EFFECT: obtaining a catalyst with high selectivity, low susceptibility to soot formation, for use in reaction mixtures with high content of methane.

3 cl, 1 tbl, 12 ex

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