Catalyst for reforming of gasoline fractions, and method of its preparation

FIELD: oil and gas industry.

SUBSTANCE: catalyst for reforming of gasoline factions is described; it contains platinum (possibly rhenium), chlorine, zeolite and gamma aluminium oxide, amorphous aluminium silicate at the following ratio of the above components, wt %: platinum - 0.1-1.0; (possibly) rhenium - 0.1-0.5; chlorine - 0.1-1.0; zeolite - 0.5-3.9; amorphous aluminium silicate - 1-2; gamma aluminium oxide - the rest. Reparation method of the above catalyst is implemented by mixing of powders of aluminium hydroxide with zeolite, peptisation of mixture with water solution of acid, granulation, heat treatment of obtained granules of carrier with further application to surface of active components - platinum in the form of water solution of platinum-chlorohydric acid and chlorine in the form of hydrochloric acid, drying and annealing of catalyst; at that, peptisation of mixture of powders of aluminium hydroxide with zeolite is performed with 0.5-20% water solution of organic acid, for example lemon, acetic and oxalic acids, and heat treatment of carrier is performed at temperature of 630-700°C.

EFFECT: increasing activity, stability and selectivity of catalyst.

3 cl, 6 ex

 

The invention relates to the refining industry and is intended for use in the process of catalytic reforming of gasoline fractions and in the production of catalysts for this process. Increasing the yield of the target products in the refining and increasing the depth of processing of raw materials in large measure solved by improving the efficiency of catalytic processes, which is one of the main processes - catalytic reforming. The increase in conversion and yield of the target products, high-octane hydrocarbons is achieved by modifying catalysts - chemical, structural, textural, including by improving the synthesis parameters and incorporating various supplements.

Often used the technique of modifying the catalysts by using different additives acidic nature. It is often the quality of these acid additives used crystalline aluminosilicates of the zeolite [RF Patent №2044940, 2000; RF patent №2027506, 1995]. This changes the ratio of the contributions of the main and side reactions, reforming, however, due to the introduction of the components, with high acidity (zeolites ZSM-5, mordenite and other acidic zeolites), usually increases the contribution of fission reactions, resulting in sharply reduced Ihad liquid catalyzate (up 79-82%).

Known for rarely used supplements erionite, which promotes selective hydrocracking of linear paraffins, without affecting branched alkanes [the Patents of the Russian Federation№1438228, 1997; №1438059, 1996]. In these patents the catalyst contains (on calcined substance) 10-50% of erionite, 1-2% of platinum, chlorine and possibly promoters, alumina - rest.

The catalysts are prepared by mixing the aluminum hydroxide and erionite (in the hydrogen or ammonium form) followed by patsatsia aqueous solution of mineral acid (usually nitrogen) and heat treatment (drying and calcination).

Carrying out the reforming process using raw materials with a high content of naphthenes with the use of these catalysts allows to obtain a reformate with a high octane number and practically with little loss of yield of liquid catalyzate, however, the activity and stability of catalysts is still not high enough (in the pilot test, respectively, 70-72, 82-84 and 7-19 wt.%).

Known methods of preparation orientadores carriers and catalysts for the conversion of various oil fractions (not reforming) [U.S. Patent№4021332, 1977; №3925191, 1975; №4987109, 1992; №6066251, 2000], includes mixing erionite and aluminum hydroxide, peptization resulting mixture a solution of mineral acid, the heat treatment of the carrier, then the application of adsorption way hydrogenating component (usually platinum) and a final heat treatment of the catalyst. By composition with the highest possible content of the zeolite and the minimum binder content (gamma-alumina), which allows you to prepare a moldable mass, giving after granulation and heat treatment strong enough granules. The content of erionite in a patent pending for the specified destination catalysts ranges from 70 to 90 wt.%.

However, for a reforming process the received anionicdetergent catalysts are not efficient enough: activity (content arenes catalyzate experience at 470°C) - 71-73%, selectivity (the resultant catalysate5+ content arenes 75%) - 81-84%, stability (drop in activity when tested in harsh conditions - 8-14%.

Known catalyst for catalytic reforming of gasoline fractions [RF patent №2352612] with a sufficiently low content of erionite from 4 to 15 wt.%, allows to increase the yield of the target product selectivity to 88-91% and to increase the concentration of hydrogen in the circulating hydrogen-containing gas. Catalyst composition and method of their preparation is not specified.

There is a method of preparation of the catalyst for conversion of hydrocarbons [U.S. patent No. 4107087, 1978], in which, after mixing of the silica gel and aluminum hydroxide in the form of powders or gels provides what I peptidase mixture of citric acid, consumption, which is 1-15%, molding, extrusion, heat treatment of the medium at high temperature (500-550°C) with the further application of hydrogenating metals (platinum and associated chlorine), the final heat treatment of the catalyst, drying and calcination, and acarnania before the test catalyst. In this case, as in the previous methods, the media is a two-component system consisting of crystalline gamma-alumina and amorphous silica gel and does not contain zeolite and amorphous aluminosilicate. The method allows to obtain robust and relatively efficient reforming catalyst, however, levels of activity, selectivity and stability (respectively 72-75%, 83-86% and 5-10%) is not high enough.

Closest to the present invention is a catalyst for reforming of gasoline fractions [RF patent №1614253 - prototype]consisting of platinum and chlorine deposited on the surface of the carrier, which is the composition of gamma-aluminium oxide and erionite in the hydrogen form and the content of erionite is in the range from 10 to 50% by weight of the product. The method of preparation of such a catalyst includes a mixture of zeolite and pseudoboehmite, peptization mixture of mineral solution (nitric) acid, extrusion, heat treatment media, adsorption applied on the surface of PLA the ins and chlorine from aqueous solution, containing hexachloroplatinic and hydrochloric acid and heat treatment of the obtained catalyst (drying and calcination). The catalyst has a high activity (up to 78%), but its selectivity is insufficient, less than 80%, and the stability is on the average, i.e. low level (7-13%).

The aim of the invention is to increase the octane number of the product reformirovania oil gasoline fractions, increasing the yield of the target product and increase stability in the reforming units operated for raw materials with high content of naphthenes (35-50%) and allowing the process at relatively low temperatures (in the range of 440-500°C) and at high space velocity of the raw material (4-5 h-1).

The problem is solved and the goals achieved by using a catalyst comprising in its composition platinum (possibly rhenium), chlorine in the media - a mixture of gamma alumina with zeolite and optionally amorphous aluminosilicate at the following content of components in the catalyst, wt.%:

Platinum - 0,1-1,0

Rhenium (possibly) 0,1-0,5,

Chlorine - 0,1-1,0

Zeolite - 0,5-3,9

Amorphous aluminosilicate - 1,0-2,0

Gamma alumina - rest.

As the zeolite catalyst contains erionite, and/or filipcic, and/or ferrierite) the Essential feature of the catalyst is mind is ichinoe amount of zeolite (to 3.9 wt.%) and the content in its composition of amorphous aluminosilicate.

The proposed catalyst composition is prepared in the following way. For preparation of the catalyst carrier, which is the composition of gamma-alumina, zeolite (erionite and/or phillipsite, and/or ferrierite) and amorphous aluminosilicate use a well-okristallizovannymi zeolite, for example - erionite with the size of coherent scattering regions 600-1000 Å (supplied by süd-Chemie, Germany) and pseudoboehmite ALCOHOLATES origin from the company Sasol, Germany (AIOOH·xH2O brand KATEPAL or Pural SB-1 or similar). The mixture of powders pseudoboehmite and zeolite containing a small proportion of zeolite - not more than 3.9% (from 0.5 to 3.9), peptizer aqueous solution of organic acids (citric, acetic, oxalic) with a concentration of 0.5 to 20%, and then granularit method screw extrusion to obtain cylindrical pellets or method drip moulding with obtaining spherical (ball) granules and subjected to a heat treatment at a temperature of 630-700°C in air. To obtain the reforming catalyst on the surface of the prepared media known adsorption method is applied platinum, chlorine and possibly rhenium, playing the role of a promoter and serves to increase the stability of the intermediate is dried similarly to the media, and then calcined at a temperature of about 500°C, directly in the installation of reforming sarnaut t the com sulfide and get the catalyst, ready-to-use.

The method of preparation of the catalyst involves the following stages:

- mixing of dry powders of aluminum hydroxide pseudoboehmite patterns and zeolite in the H form or NH4-the form;

- peptidase mixture obtained by treating an aqueous solution of organic acids (citric, acetic, oxalic) under continuous mechanical stirring;

- granulation of the obtained gel extrusion through a thin matrix, or drip molding obtained pseudosasa hydrocarbon-ammonia method;

- heat treatment of the freshly-formed granules media - drying and calcination in dried air at a temperature of 630-700°C;

- coating the surface of the carrier aqueous solution of compounds active ingredients - platinum (in the form of hexachloroplatinic acid) and chlorine (hydrochloric acid);

- heat treatment of the catalyst, drying and calcination in air flow;

- acarnania catalyst in the gas phase by filing through the contact layer of the mixture of hydrogen sulfide with hydrogen (known way to install reforming).

When applying the method screw extrusion take a relatively small amount of acid solution-patinator about 1 l per 1 kg of calcined basis in the mixture of powders and thus get the pasta, which granularit. When using the method of the drip molding the flow of solution patinator increase in 2-10 times with getting pseudosasa, through the disperser under low pressure is passed through a layer of kerosene and the underlying layer of a solution of ammonia and soak in the ammonia solution for hardening and curing. Salient features of preparation of the catalyst of the proposed structure is peptidase mixture of pseudoboehmite and zeolite with an aqueous solution of organic acids (citric, oxalic, acetic) with a concentration of 0.5-20% and a high temperature heat treatment of the medium, equal 630-700°C.

The catalyst was tested in the process of catalytic reforming of straight-run hydrotreated broad gasoline fraction with a boiling within 85-180°C and the following contents of the main classes of hydrocarbons, wt.%: aromatic - 6,0-10,0, naphthenic - 32-52, olefin - 0,2-0,4, paraffin - 38-61 and with a low content of sulfur is less than 0.5 ppmw (mg/kg or mn-1).

First conduct the reforming of this material in soft mode: when temperature 440, 460 and 480°C, respectively 40-50, and 20-25 20-25 hours at a pressure of 1.5 MPa, the space velocity of the raw material 4 h-1and the frequency of circulation of the hydrogen-containing gas (hydrogen-rich) 1200-1500 D./l of raw material per hour. The total duration of the run in soft mode is about 4 days.

Then move to the hard mode in the following conditions: the temperature was raised to 500°C., the pressure is reduced to 1.0 MPa, and arnosti circulation everything is reduced to 800 D./l of raw materials. The experience carried out for 100 hours.

The catalyst is characterized by the presence of aromatic hydrocarbons in catalyzate obtained at a temperature of 460°C, the selectivity value of the output liquid stable catalyzate content arenes 74 wt.%, and as a measure of stability take a drop of activity during trials in hard mode (with 20-to 100-th hour).

Industrial applicability the present invention is illustrated by the following examples.

EXAMPLE 1

Take the 122.7 g of powder pseudoboehmite brand Pural SB (production company "Sasol", Germany), is characterized by loss on ignition at 850°C (SPT)equal to 25.0%of that in terms of Al2O3is 92,0, the particle Size of the powder pseudoboehmite 5-20 microns.

Also take 7,46 g "tortillas" (wet washed from salts and pressed on the filter sludge) erionite in the protonated form (production company "süd-Chemie, Germany). The "pellet" zeolite - 50%, calcined matter - of 3.73, the particle Size of the zeolite 2-5 microns.

The powders are mixed in the mixer of the Werner with Z-shaped blades for 15 minutes, and then subjected to peptization-modification.

For this to powder gradually add 100 cm3an aqueous solution of citric acid with a concentration of 7%.

After extrusion the resulting granules are dried and annealed at 630°C in which Suche. Get about 100 g of the carrier is a mixture of gamma-alumina with erionite (respectively 96.1 3.9 wt.%).

The carrier is brought into contact with 140 ml of aqueous impregnating solution containing 0,945 g H2PtCl6, 2.2 ml of glacial acetic acid and 0.7 g of HCl (38%). The impregnation is conducted for 2 hours under stirring, with 1 hour without external heating (or cooling to 5-10°C. and 1 hour with heating at 80-85°C. after this operation, the excess solution is drained, the granules are dried in air to condition the flowability of the catalyst. Next, the catalyst is dried at a temperature of about 150°C in static conditions (in an oven) and calcined in a tubular reactor in a dehumidified air speed heating 25°C/h, 500°C, speed of supply air humidity 131.6 l/h, the duration of annealing 3-4 hours.

The catalyst composition (in wt.% in terms of dry substance): 0,45 Pt; 3,3 SiO2(3.9% erionite with silicate module 6,0); 0,65 Cl; the rest is aluminum oxide. According to XRD, the content of amorphous films of silicate (A.S.) ~1.5 wt.%.

Before testing, the catalyst is reactivated by hydrogen at a temperature of 450-500°C, pressure of 1.0 MPa and a supply of dry pure (electrolytic) hydrogen 66,6 l/hour for 3-4 hours and in pilot plant sarnaut at the same temperature, passing through a bed of the catalyst mixture of odor is Yes with hydrogen sulfide at the rate of feed of 0.15% S by weight of the sample.

The results of the pilot tests:

- activity - the content of aromatic hydrocarbons in catalyzate, the resulting experience at a temperature of 460°C is 75.0 wt.%.

- selectivity - output stable catalyzate5+ with the content of aromatic hydrocarbons 72 wt.% - 92,0 wt.%.

- stability - index of activity decline in hard mode to 4.0 wt.%.

EXAMPLE No. 2.

In General, the same as in example No. 1, but with slight deviations.

Take 128.0 g of powder pseudoboehmite Pural SB with a particle size of 20-50 microns and SPT=25,0%, which corresponds to 96 g of Al2O3.

Weigh 0.96 g "tortillas" erionite in NH4-the form that has the following characteristics: SPT=50%, a particle size of 1-5 microns. On calcined product weighed erionite contains 0,48,

The content of erionite mixed with aluminum oxide (on calcined basis) is 0.5 wt.%.

The concentration of acetic acid - patinator - 15%. The media was prepared by the method of drip moulding hydrocarbon-ammonia method. The temperature of calcination of the carrier - 650°C

The content in the catalyst: Pt - 0,35%, Cl - 0,8%, SiO2at 0.42%, amorphous A.S. films of 1.6%

The results of the tests:

- activity - of 73.5 wt.%,

- selectivity - 91 wt.%

- stability - 5 wt.%.

EXAMPLE # 3

The media in General, prepared as described is example # 1, but with the following exceptions.

Use powder pseudoboehmite Pural SB-1, having a particle size of 10-50 μm and SPT=28% at 850°. Take 133,3 g of powder, which in terms of the oxide is 96,0,

Arianit this sample is replaced by an equivalent amount of ferrierite (SPT=12%, the particle size of 2-25 μm), namely of 4.2 grams or 3.7 g of calcined product.

The ratio of main components: 96,1% gamma alumina and 3.9% ferrierite.

The temperature of calcination of the carrier - 630°C.

As acid peptization use a solution of oxalic acid with a concentration of 20%.

According to the analysis of the content of amorphous as. film - 1,1%, the content of silicon oxide in the catalyst of 3.28%.

The results of standard tests:

activity is 74.5 wt.%,

- selectivity is 91.5 wt.%,

- stability - 3.8 wt.%.

EXAMPLE No. 4

Same as in example # 3, but instead ferrierite take zeolite filipcic (SPT=12%). Other conditions and parameters, as well as quantitative indicators of the composition does not differ from the values in examples 3 and 1 (peptization - citric acid with a concentration of 0.5%), except for the temperature of calcination of the carrier, which amounted to 730°C.

The content of amorphous aluminosilicate components to 2.0%

The results of the tests:

- activity - to 74.2 wt.%,

- selectivity - the 90.8 wt.%,

- stability - 4.3 wt.%.

EXAMPLE No. 5

Same as in example No. 1, but take the powder erionite in ammonium form (NH4-E). The particle size of erionite 2-10 μm, SPT=14%. For compositions used with 4.65 g of zeolite powder or 4.0 g on calcined product.

The catalyst contains 96.1% of aluminum oxide and 3.9% of erionite or 3.0% of silicon oxide. The content of amorphous A.S. phase is 1.0%. The concentration of citric acid taken for peptization and modification amounted to 8%. The temperature of calcination of the carrier was modified is taken equal to 670°C.

The results of the tests:

activity is 76.1 wt.%,

- selectivity - 90,3 wt.%,

- stability - 4.2 wt.%.

EXAMPLE No. 6

Analogously to examples 1 and 5, but as pseudoboehmite taken a powder And Catapal (SPT=25%, the particle size of 50-80 μm), and erionite also used in the form of "bread" in the ammonium form (SPT=50%, a particle size of 5-20 μm).

The content of platinum - 0,45%, the content of silicon oxide to 3.0%, a chlorine content of 0.8%, the content of the amorphous film 2%.

The results of the tests:

- activity - to 76.6 wt.%,

- selectivity - 90,9%

- stability - 4.3 wt.%.

1. The catalyst for reforming of gasoline fractions, including platinum, possibly rhenium), chlorine, zeolite and gamma alumina, characterized in that it further comprises amorphous aluminosilicate in the following mentioned is komponentov, in wt.%:

platinum0,1-1,0
(possibly) rhenium0,1-0,5
chlorine0,1-1,0
zeolitefrom 0.5 to 3.9
amorphous aluminosilicate1-2
gamma aluminarest

2. The catalyst according to claim 1, characterized in that the zeolite contains erionite, and/or filipcic, and/or ferrierite in the hydrogen or ammonium form.

3. The preparation method of the catalyst for reforming of gasoline fractions according to claim 1 by mixing powders of aluminum hydroxide with zeolite, peptization of the mixture aqueous solution of acid, granulation, heat treatment of the obtained granules media with subsequent deposition on the surface of the carrier of the active components of platinum in the form of an aqueous solution of hexachloroplatinic acid and chlorine in the form of hydrochloric acid, drying and calcination of the catalyst, characterized in that peptization mixture of powders of aluminum hydroxide with zeolite exercise of 0.5-20%aqueous solution of organic acid such as citric, acetic, oxalic, and termopan the weave of the carrier is carried out at a temperature of 630-700°C.



 

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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.

SUBSTANCE: proposed catalyst comprises crystalline aluminium silicate, aluminium gamma-oxide and amorphous aluminium at the following radio of components, wt % aluminium silicate - 1-10, amorphous aluminium - 1-10, aluminium gamma-oxide making the rest. Proposed method comprises making the carrier of said composition by mixing dry powders of aluminium hydroxide and crystalline aluminium silicate, peptisation of produced mix by water solution of citric acid with solution concentration of 1-10 wt %, granulation and thermal treatment of produced carrier at, at least, 630°C.

EFFECT: higher efficiency of reforming.

3 cl, 6 ex

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: chemistry.

SUBSTANCE: invention relates to activation of catalysts. Proposed invention covers activation of catalyst of isomerisation of light gasoline fractions that contains platinum and/or palladium on oxide carrier with elements of the 3rd, 4th and 6th groups of periodic system by drying in dry airflow at increased temperatures, blowing by inert gas and reducing by hydrogen at increased temperature and pressure. Proposed method differs from known procedures in that hydrogen treatment is performed with water addition in amount of 5 -20 m/n-1.

EFFECT: increase in specific activity of catalyst.

3 cl, 1 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of reforming straight-run gasoline fractions in the presence of a hydrogen-bearing gas in a system of several series-connected reactors with platinum-containing catalysts at high pressure and temperature, carried out in three steps with pressure at the input of the system of reforming reactors equal to 1.5 MPa, molar ratio of hydrogen/raw material of not less than 8. At the first step, aromatisation of cycloalkanes and alkanes through contact of hydrocarbon components with an aluminium-platinum-rhenium catalyst is carried out with mass velocity of feeding the raw material equal to 2 h-1 in terms of the mass of the catalyst and temperature of 490-500°C. At the second step, hydroisomerisation of arenas, cycloalkanes and alkanes is carried out on a zirconium-aluminium sulphate catalyst which contains platinum, with mass velocity of feeding raw material equal to 4-8 h-1 in terms of mass of catalyst and temperature of 300°C and at the third step, aromatisation of cycloalkanes on an aluminium-platinum-rhenium catalyst is carried out with mass velocity of feeding raw material equal to 4-8 h-1 and temperature of 420-440°C.

EFFECT: obtaining a high-octane component with low content of aromatic hydrocarbons and high efficiency of preparing modern environmentally safe petrol.

6 ex, 1 tbl

FIELD: oil-and-gas production.

SUBSTANCE: invention related to method of reforming catalysts activation and can be used in oil refining industry, oil-and-gas industry. Invention related to activation of reforming catalysts with a platinum content by treating it with circulating HBG under the high temperature, containing hydrocarbons C1-C3, in which inject HBG with a higher hydrogen concentration, increase of activation temperature started after reaching not greater than 1.5% vol. C2-C3 hydrocarbons concentration in HBG and humidity not greater than 30 mln -1, therefore continuously supply circulating with dried HBG with hydrogen concentration not less than 98% vol. in amounts 20-30 nm3 per 1 m3 of catalyst. The greatest effect of proposed method appears at activation temperature 500-520°C and duration 24-48 hours, also using feeding HBG with C2-C3 hydrocarbons content not greater than 0.3% vol.

EFFECT: increase in interregenerative catalyst work cycle, reforming process temperature decrease, circulating HBG hydrogen concentration increase after catalyst activation.

3 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to methods of reducing platinum-rhenium reforming catalyst and can be used on oil-refining, petrochemical and gas production enterprises. A method is proposed for reducing platinum-rhenium reforming catalyst through high temperature treatment with a circulating reforming hydrogen-containing gas, containing an additive of sulphur compounds in amount of 0.05-0.30 % of the mass of catalyst (in terms of sulphur) in two stages. The method is distinguished by that, the platinum-rhenium catalyst is pre-treated only with hydrogen-containing gas at temperature 480-500°C for 2-4 hours, and treatment with sulphur compound additives at the first stage is done at temperature 480-400°C, and 280-260°C at the second stage.

EFFECT: significant increase of octane number of reformate, as well as inter-regeneration cycle of the catalyst.

4 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: present invention refers to naphtha reforming catalyst. There is disclosed a catalyst effective in naphtha reforming involving particles of heat-resistant inorganic oxide carrier containing dispersed bivalent tin, platinum group metal and rhenium and optionally halogen, characterised that tin uniformly coats the catalyst, and platinum group metal uniformly coats the catalyst; tin is impregnated into the carrier with using tin chelate resulted from reaction of chelating agent representing amino acid and bivalent tin salts. There is also disclosed catalytic reforming of naphtha as feed stock, wherein feed stock contacts with said catalyst in reforming environment involving temperature 315°C-600°C, pressure 100 KPa - 7 MPa (abs.), liquid hourly space velocity 0.1-20 h-1, and molar ratio of hydrogen to naphtha feed stock 1-20.

EFFECT: new naphtha reforming catalyst and new catalytic reforming of naphtha.

10 cl, 2 dwg, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: invention refers to noble-metal catalyst, to method for making and application thereof. There is disclosed method for making noble-metal catalyst for hydrocarbon conversion, involving the stages as follows: a) preparation of the carrier containing zeolite, chosen from zeolites with medium and large pores and acid sites, at temperature within 423 to 1173 K and optional carrier modification; b) deposition of noble metal chosen from platinum, palladium, ruthenium, rhodium, iridium and their mixtures and combinations, by gas-phase deposition including evaporation of noble metal precursor chosen from β-diketonates and metallocenes, and interaction with the carrier, and c) heat treatment in oxidising or reducing environments. There is disclosed application of noble-metal catalyst produced by the method described above, in ring opening, isomerisation, alkylation, hydrocarbon reforming, dry reforming, hydrogenation and dehydrogenation, and preferentially, in ring opening of naphthenic molecules. Additionally, there is disclosed method for making medium diesel fuel distillate by introducing raw medium distillate into the reactor wherein it reacts at temperature 283-673 K and under pressure 10-200 bar with hydrogen with added noble-metal catalyst produced as described above until ring opening of naphthenes with two or more rings completed to produce isoparaffins, n-paraffins and mononaphthenes within medium distillate.

EFFECT: production of catalyst with improved selectivity for hydrocarbon conversion.

16 cl, 5 tbl, 20 ex

FIELD: chemistry.

SUBSTANCE: process proposed for catalytic reforming of petroleum naphtha in presence of hydrogenous gas is carried out in three stages in system of several series-connected reactors over platinic catalysts at increased pressure and temperature; on first stage cycloalkanes and alkanes aromatization is effected by contacting the hydrocarbon components with aluminium-platinum-rhenium catalyst at mass rate of crude material feed 4 to 8 hour-1, relative to catalyst weight, and temperature 460-480°C; on second stage arenes, cycloalkanes, and alkanes hydro-isomerisation is effected over zirconium-sulphate catalyst, containing platinum, at mass rate of feed minimum 8 hour-1, relative to catalyst weight, and temperature 150-200°C; and on third stage cycloalkanes aromatization is effected again over aluminium-platinum-rhenium catalyst also at mass rate of feed minimum 8 hour-1, relative to catalyst weight, and temperature 360-400°C; the reforming reactors system input pressure being 1.5 MPa, and the hydrogenous gas is fed to the system entrance in quantity, corresponding hydrogen to raw material molar proportion minimum 8.

EFFECT: production of high-octane component with lowered aromatic hydrocarbons level, and increase in manufacture efficiency of modern pollution-free fuel.

5 ex, 1 tbl

FIELD: CHEMISTRY.

SUBSTANCE: zeolite catalyst for process of conversion of straight-run gasoline to high-octane number component is described. The said catalyst contains high-silica zeolite with SiO2/Al2O3=60 and residual content of Na2О of 0.02 wt.% maximum, metal-modified, Pt, Ni, Zn or Fe metals being in nanopowder form. Content of the said metals in the catalyst is 1.5 wt.% maximum. Method to manufacture zeolite catalyst for conversion of straight-run gasoline to high-octane number component is described. The said method implies metal modification of zeolite, Pt, Ni, Zn or Fe metals being added to zeolite as nanopowders, produced by electric explosion of metal wire in argon, by dry pebble mixing in air at room temperature. Method to convert straight-run gasoline using the said catalyst is also described.

EFFECT: increase in catalyst activity and gasoline octane number, accompanied by increase in yield.

4 cl, 3 tbl, 4 ex

FIELD: process engineering.

SUBSTANCE: invention relates to catalysts of hydrogen and oxygen recombination. Proposed method consists in impregnating catalyst porous base with solution of compound of catalytically active metal and liquid chemical reducing agent. After drying of said base, it is calcined to reduction of catalytically active metal. It differs from known processes in that aforesaid chemical reducing agent represents hydroxyethylated monoalkyl phenol with the number of bonded moles of ethylene oxide varying from one to ten, or the mix of oxyethylated mono- and dialkylphenols. Note here that said reducing agent is added directly to solution of compound of catalytically active metal.

EFFECT: simplified and accelerated production, higher catalyst properties, reduced losses.

7 cl, 2 tbl, 2 ex

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