Catalyst, method of preparation thereof, and a method treating hydrogen-containing gas mixtures to remove carbon monoxide

FIELD: catalytic gas treatment.

SUBSTANCE: invention proposes catalyst for treating hydrogen-rich gas mixtures to remove carbon monoxide via methanation of carbon monoxide, said catalyst containing nickel-cerium oxide system. Catalyst is prepared by reaction of nickel compounds with cerium compound. Methanation of carbon monoxide is conducted at temperature not below 20°C and pressure not below 0.1 atm in presence of above-indicated catalyst.

EFFECT: enhanced removal of carbon monoxide to level below 10 ppm.

8 cl, 5 tbl, 9 ex

 

The invention relates to a catalyst and process for the catalytic purification method from carbon monoxide hydrogen-containing gas mixtures. Hydrogen is one of the most important industrial gases and is widely used in metallurgical, chemical, petrochemical and food industries.

Hydrogen is also expected to be used in hydrogen energy, for example, as fuel for fuel cells. In this case, hydrogen can be obtained in a catalytic chemical process, for example, of various hydrocarbons (gasoline, natural gas, alcohols, dimethyl ether, and others). This hydrocarbon material using steam and/or oxygen conversion and subsequent steam reforming of carbon monoxide in the hydrogen-containing recycle gas mixture. The mixture typically consists of N2, CO2N2N2About ˜ 1% vol. WITH. It is known that the carbon monoxide at a concentration of more than about 0.001.% (10 ppm) is poison to the fuel electrode. Therefore, such a hydrogen-containing gas mixture to be cleaned of carbon monoxide before it is supplied to the fuel cell. One possible method of cleaning gas mixture of carbon monoxide is the process of selective mahanirvana WITH.

This cleaning occurs by the reaction:

However, since the mixture is present and carbon dioxide, it could also be mahanirvana:

CO2in the mixture is present in much greater concentrations of ˜20-25 vol.%, than, so in case of occurrence of this adverse reactions possible large loss of hydrogen. The selectivity of the process mahanirvana WITH in the presence of CO2in the hydrogen-containing mixtures is equal to the ratio of the number WITH turned in CH4to the entire amount of methane formed in the reactions of mahanirvana co and CO2:

Currently known method (prototype) the reaction of selective mahanirvana WITH in the presence of CO2where the catalyst is used Pt-Ru catalysts deposited on oxide carriers (US 2006/0111456 A1, C07C 27/06, dated 25.05.2006). One disadvantage of these catalysts is the high content of platinum and ruthenium (up to 5 wt.%). Another disadvantage is the low level, when the initial concentration of 1% vol. WITH the conversion FROM was only 90-95%, which corresponds to the output concentrations FROM 1000-500 ppm with the necessary level below 10 ppm.

The invention solves the problem of increasing the efficiency of the process of selective mahanirvana CO in the hydrogen-containing gas mixtures and reduce the concentration of carbon monoxide to less than 10 ppm.

Task resh which is due to the use of more active and selective catalysts based on Nickel, applied to the cerium oxide in an amount of not less than 0.1 wt.%, mainly, 0.1 to 50 wt.%.

The task is also solved by a method of preparation of the catalyst for purification of hydrogen-containing gas mixtures of carbon monoxide by mahanirvana carbon oxide coating of Ni compounds, for example, Ni(NO3)2, [Ni(NH3)6](NO3)2, With NISO4, NiCl2, [Ni(NH3)6]Cl3and so, cerium compounds, followed by drying in air and further curing at a higher temperature in an oxidizing (e.g., air, inert or reducing atmosphere. The result is nigellarina oxide system, and cerium is present mostly in the form of cerium oxide, and Nickel in the catalyst may be present in the form of metal and/or oxides of Nickel, and/or in the form of ceritadewasa compounds of Nickel, and in the case of aging in an oxidizing atmosphere is dominated by Nickel oxide and ceritadewasa compounds of Nickel, in the case of aging in a reducing atmosphere is dominated by Nickel in the form of metal and ceritadewasa compounds of Nickel, and in the case of curing in an inert atmosphere, the Nickel can be equally as in the form of metal, oxide, and also in as ceritadewasa of Nickel compounds.

The task is also solved by way of clear and hydrogen-containing gas mixtures of carbon monoxide by mahanirvana of carbon monoxide on the catalyst, described above. The process is carried out at a temperature of not less than 20°C, a pressure of not lower than 0.1 ATM.

The purified enriched hydrogen gas mixture contains not less than 0.001% vol. carbon dioxide.

The purified hydrogen-containing gas mixture may contain not less than 0.001% vol. water vapour.

The purified hydrogen-containing gas mixture may contain not less than 0.001% vol. of nitrogen.

The invention is illustrated by the following examples for the preparation of the catalysts defined above composition and examples describing the results of the tests of the catalysts in the reaction of selective oxidation of CO in hydrogen-containing gas mixtures in the presence of CO2.

Preparation of catalysts

Example 1. Getting nickelharjavalta oxide sample with 2 wt.% Ni by impregnation.

0,483 g of salt [Ni(NH3)6](NO3)2dissolve in 5 ml of water at a temperature of 80°C. 4.9 g of cerium oxide fill in the thus prepared solution and heated on a water bath with constant stirring until complete drying. Obtained air-dry the sample incubated 1.5 h at 100°With air, then aged in an oxidizing (air) atmosphere at 400°C for 2 hours

The content of Ni in the catalyst is 2 wt.%.

Example 2. Getting nikela avago oxide sample with a content of 10 wt.% Ni by impregnation.

2,02 g NiCl2·6H2O dissolved in 5 ml of water at a temperature of 80°C. 4.5 g of powder of cerium oxide fill in the thus prepared solution and heated on a water bath with constant stirring until complete drying. Obtained air-dry the sample incubated 1.5 h at 100°With air, and then kept in a reducing atmosphere at 500°C for 2 hours

The content of Ni in the catalyst is 10 wt.%.

Example 3. Getting nickelharjavalta oxide sample containing 20 wt.% Ni method nasajdeniya.

is 4.93 g of salt Ni(NO3)2·6H2O dissolved in 100 ml of water containing 4 g of fine powder of cerium oxide. To the resulting solution was poured with stirring 50 ml of a solution containing 2 g of (NH4)CO3, after which the resulting precipitate is filtered off and dried in air. Obtained air-dry the sample incubated 1.5 h at 100°With air, then aged in an inert atmosphere at 400°C for 2 hours

The content of Ni in the catalyst is 20 wt.%.

Example 4. Getting nickelharjavalta oxide sample containing 50 wt.% Ni by co-deposition.

of 12.33 g of salt Ni(NO3)2·6H2O and 6.3 g of salt CE(NO3)3·6N2O dissolved in 100 ml of water. To the resulting solution was poured with stirring 50 ml of solution steriade is about 8 g (NH 4)2CO3, after which the resulting precipitate is filtered off and dried in air. Obtained air-dry the sample incubated 1.5 h at 100°With air, and then kept in a reducing atmosphere at 600°C for 2 h, the Content of Ni in the catalyst is 50 wt.%.

The test catalysts

The process of purification of hydrogen-containing gas mixtures of carbon monoxide is carried out in a flow reactor with a single layer of catalyst. The reactor is a quartz tube with an inner diameter of 3 mm Layer consists of 0.25 g of catalyst. As catalysts take nickalarie oxide samples. The volumetric rate varies in the interval 1000-150000 h-1the temperature of the catalyst layer in the range of 20-400°C. the Reaction proceeds in the range of pressures of 1-10 ATM. The reaction gas mixture has a composition 10-99,989% vol. H2, 0.001 to 50% vol. CO2, 0.01 to 2% vol. WITH, 0-30% vol. H2Oh, 0-90% vol. N2.

Example 5.

The process of purification of hydrogen-containing gas mixtures of carbon monoxide is carried out in a flow reactor at nickelcadmium oxide sample with 2 wt.% Ni at flow rate 15000 h-1and atmospheric pressure. The reaction gas mixture consists of 1 vol.% WITH, 69% vol. H2, 20 vol.% CO2, 10% vol. H2O. the results are shown in table 1.

Table 1.
Temperature, °The concentration of CO at the outlet of the reactor, vol.%Selectivity, %
2800,00195
2900,000789
3000,000685
3100,000780

Example 6.

The process is similar to example 5, is performed at nickelcadmium oxide sample with 2 wt.% Ni in the volumetric velocity of 30,000 h-1and atmospheric pressure. The reaction gas mixture consists of 0.5% vol. WITH, 69,5% vol. H2, 20 vol.% CO2, 10% vol. H2O. the results are shown in table 2.

Table 2.
Temperature, °The concentration of CO at the outlet of the reactor, vol.%Selectivity, %
2800,00195
2900,000791
3000,000687
3100,000783

Example 7.

The process is similar to example 5, is performed at nickelcadmium oxide sample containing 20 wt.% Ni at flow rate 15000 h-1and atmospheremulti. The reaction gas mixture consists of 1 vol.% FROM, 60% vol. H2, 20 vol.% CO2, 10% vol. H2About 9% vol. N2. The results are presented in table 3.

Table 3.
Temperature, °The concentration of CO at the outlet of the reactor, vol.%Selectivity, %
2700,00195
2800,000790
2900,000688

Example 8.

The process is similar to example 5, is performed at nickelcadmium oxide sample with a content of 10 wt.% Ni in the volumetric velocity of 5000 h-1and atmospheric pressure. The reaction gas mixture consists of 1 vol.% WITH, 50% vol. H2, 18% vol. CO2, 16,5% vol. H2O, 14,5% vol. N2. The results obtained are presented in table 4.

Table 4.
Temperature, °The concentration of CO at the outlet of the reactor, vol.%Selectivity, %
2300,000390
2400,000485
2500,000680

Example 9 (Comparative to patent US 2006/0111456 A1, C07C 27/06, 5.05.2006).

The process of purification of hydrogen-containing gas mixtures of carbon monoxide is carried out in a flow reactor at Pt-Ru/Al2O3the catalyst containing 0.98 wt.% Pt and 1,02% wt. EN, when flow rate 4700 h-1and atmospheric pressure. The reaction gas mixture consists of 1 vol.% WITH, 50% vol. H2, 18% vol. CO2, 16,5% vol. H2Oh, 14,5% vol. N2. The results are presented in table 5.

Table 5.
Temperature, °The concentration of CO at the outlet of the reactor, vol.%Selectivity, %
2500,150

Thus, as can be seen from the examples and tables, the present invention enables efficient purification process enriched hydrogen gas mixtures to the level of the CO content is less than about 0.001 vol.% (i.e. 10 ppm), while the proposed nickalarie oxide catalysts are significantly higher than the activity and selectivity of Pt-Ru/Al2O3the catalyst proposed in the prototype.

1. The catalyst for purification of hydrogen-containing gas mixtures of carbon monoxide by mahanirvana of carbon monoxide, characterized in that it is sikelianou oxide system.

2. The catalyst according to claim 1, characterized in that the content of amnicola not less than 0.1 wt.%, mostly 0.1 to 50 wt.%.

3. The method of preparation of the catalyst according to claims 1 and 2 for the purification of hydrogen-containing gas mixtures of carbon monoxide, characterized in that the catalyst prepared by the interaction of Nickel compounds with cerium compounds.

4. The method according to claim 3, characterized in that the catalyst contains Nickel in an amount not less than 0.1 wt.%, mostly 0.1 to 50 wt.%.

5. The method of purification of hydrogen-containing gas mixtures of carbon monoxide by mahanirvana of carbon monoxide in the presence of a catalyst at a temperature of not lower than 20°and a pressure not lower than 0.1 ATM, characterized in that the catalyst used, the catalyst according to claims 1 and 2 or cooked PP and 4.

6. The method according to claim 5, characterized in that the purified hydrogen-containing gas mixture contains not less than 0.001% vol. carbon dioxide.

7. The method according to claim 5, characterized in that the purified hydrogen-containing gas mixture may contain not less than 0.001% vol. water vapour.

8. The method according to claim 5, characterized in that the purified hydrogen-containing gas mixture may contain not less than 0.001% vol. of nitrogen.



 

Same patents:

FIELD: chemical industry; natural gas industry; methods of production of the hydrocarbons out of the gaseous hydrocarbon raw materials.

SUBSTANCE: the invention presents the method of production of the hydrocarbons out of the gaseous hydrocarbon raw with usage of Fischer-Tropsch catalyst including the following phases: i) transformation by means of the partial oxidization of the gaseous hydrocarbon raw material and the oxygen-containing gas into the synthesis gas at the heightened temperature and pressure; ii) the catalytic conversion of the synthesis gas of the phase (i) with usage of Fischer-Tropsch catalyst on the basis of cobalt on zirconium oxide into the stream containing the hydrocarbon; iii) division of the hydrocarbons-containing stream of the phase (ii) into the stream the hydrocarbon product and the recycling stream; and iv) withdrawal of the carbon dioxide from the recycling stream and return of the carbon dioxide depleted recycling stream into the phase (i).

EFFECT: the invention ensures effective production of the hydrocarbons out of the gaseous hydrocarbon raw materials.

6 cl, l tbl, 1 ex

FIELD: synthesis gas reaction catalysts.

SUBSTANCE: invention relates to catalyst for producing hydrocarbon from synthesis gas, which is suitable for hydrogenating carbon monoxide and obtaining hydrocarbon from carbon monoxide. Catalyst is composed of carrier, on which metal compound is deposited, catalyst containing impurities within a range from 0.02 to 0.15 wt %. Preparation of catalyst comprises preliminarily treating catalyst support to reduce concentration of impurities followed by depositing metal on support. Catalytic production of hydrocarbon from synthesis gas is also described.

EFFECT: increased activity, strength, and abrasion resistance of catalyst.

59 cl, 1 dwg, 1 tbl, 7 ex

FIELD: chemical engineering.

SUBSTANCE: invention relates to chemical process and catalytic reactors suitable for carrying out the process. In particular, Fischer-Tropsch synthesis is described involving compact block of catalytic reactor (10) forming passages wherein gas-permeable catalyst structure (16) is present, said passages extending between manifolds (18). Synthesis is performed in at least two steps since reactor block provides at least two consecutive passages (14, 14a) for Fischer-Tropsch synthesis process interconnected through manifold wherein gas flow velocity in the first passages is high enough to limit conversion of carbon monoxide to 65%. Gases are cooled in manifold between two steps so as to condense water steam and then passes through the second passage at flow velocity high enough to limit conversion of the rest of carbon monoxide to 65%.

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17 cl, 3 dwg

FIELD: disproportionation reaction catalysts.

SUBSTANCE: invention relates to Fischer-Tropsch catalyst containing cobalt and zinc, to a method for preparation thereof, and to Fischer-Tropsch process. Catalyst according to invention containing co-precipitated cobalt and zinc particles, which are characterized by volume-average size below 150 μm and particle size distribution wherein at least 90% of the catalyst particle volume is occupied by particles having size between 0.4 and 2.5 times that of the average particle size and wherein zinc/cobalt atomic ratio within a range of 40 to 0.1. Catalyst is prepared by introducing acid solution containing zinc and cobalt ions at summary concentration 0.1 to 5 mole/L and alkali solution to reactor containing aqueous medium wherein acid solution and alkali solution come into contact with each other in aqueous medium at pH 4-9 (deviating by at most 0.2 pH units) at stirring with a speed determined by supplied power between 1 and 300 kW/L aqueous medium and temperature from 15 to 75°C. Resulting cobalt and zinc-including precipitate separated from aqueous medium, dried, and further treated to produce desired catalyst. Employment of catalyst in Fischer-Tropsch process is likewise described.

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13 cl, 2 dwg, 1 tbl, 5 ex

FIELD: production of pigments and catalysts based on titanium dioxide, in particular, process for treatment of titanium dioxide for removal of sulfur, in particular sulfates.

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EFFECT: increased efficiency in cleaning of titanium dioxide from sulfur, in particular sulfates.

9 cl, 5 tbl, 5 ex

FIELD: petrochemical process catalyst.

SUBSTANCE: invention relates to a method of preparing catalyst for use in Fischer-Tropsch process and to catalyst obtained according present invention. Preparation of catalyst suitable for conversion at least one synthesis gas component comprises: providing aqueous solution of organic acid; adding iron metal to acid solution; passing oxidant through the solution until iron metal is consumed and iron-containing slurry formed; grinding resulting slurry to achieve average particle size less than about 2 μm; adding at least one promoter to ground iron-containing slurry to form product suspension, concentration of said promoter being such as to obtain said product suspension containing solid phase constituting from about 10 to about 40% of the weight of suspension, including said promoter; performing spray drying of suspension to obtain particles; and calcining these particles to obtain desired catalyst.

EFFECT: optimized catalyst preparation procedure.

23 cl, 2 dwg, 1 tbl, 12 ex

FIELD: alternate fuel production.

SUBSTANCE: invention relates to synthesis of hydrocarbons from CO and H2, in particular to catalysts and methods for preparation thereof in order to carrying out synthesis of hydrocarbons C5 and higher according to Fischer-Tropsch reaction. Method resides in that non-calcined zeolite ZSM-12 in tetraethylammonium-sodium form is subjected to decationation at pH 5-9, after which decationized zeolite (30-70 wt %) is mixed with alumina binder while simultaneously adding cobalt (7.5-11.5 wt %) as active component and modifier, in particular boron oxide (3-5 wt %). Proposed method allows catalyst preparation time to be significantly reduced owing to combining support preparation and deposition of active component and modifier in one stage with required catalytic characteristics preserved. In addition, method is environmentally safe because of lack of waste waters, which are commonly present when active components are deposited using impregnation, coprecipitation, and ion exchange techniques.

EFFECT: reduced catalyst preparation time and improved environmental condition.

1 tbl, 10 ex

FIELD: petrochemical processes.

SUBSTANCE: synthesis gas is subjected to conversion to produce liquid hydrocarbons in sequentially connected reactors containing catalytic slurry of at least one solid catalyst in a liquid phase. Reactors are triphase bubble column-type reactors provided with virtually full stirring characterized by liquid Peclet number below 8, gas Peclet number below 0.2, and diameter larger than 6 m. Last reactor at least partially receives at least part of at least one of the gas fractions collected at the outlet of at least one of other reactors. At least one reactor is supplied with stream of catalytic slurry coming directly out of another reactor, and at least one stream of catalytic slurry coming out of reactor is at least partially separated so as to receive liquid product substantially free of catalyst and catalyst-rich catalytic slurry, which is then recycled.

EFFECT: improved process technology.

10 cl, 8 dwg, 7 ex

FIELD: organic synthesis catalysts.

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33 cl, 9 dwg, 1 tbl, 10 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for synthesis of alcohol comprising synthesis of olefins by the Fischer-Tropsch process followed by the hydroformylation reaction and isolation of mixture of alcohols. Hydrocarbon fraction with the content of linear olefins 10-45 wt-% is separated from products reaction synthesized by the Fischer-Tropsch process with using cobalt catalyst by distillation followed by its hydroformylation with carbon monoxide and hydrogen taken in the molar ratio hydrogen to carbon monoxide = 1.0-5.0. The reaction of synthesis is carried out in the presence of cobalt-base catalyst and a substituted or unsubstituted monophosphocycloalkane ligand followed by steps of hydrogenation and distillation. Invention provides preparing a composition with the content of linear (C7-C12)-alcohols 60 wt.-%, not less, high rate of reaction and high selectivity of the process.

EFFECT: improved method of synthesis.

8 cl, 3 tbl, 4 ex

FIELD: gas treatment catalysts.

SUBSTANCE: invention relates to a method for preparing catalyst and to catalyst supported by block ceramic and metallic carrier having honeycomb structure for treating internal combustion engine exhaust gases. Preparation of catalyst comprises preliminary calcination of inert honeycomb block carrier followed by simultaneously depositing at 550-800°C, on its surface, intermediate coating of modified alumina and active phase consisting of one or several platinum group metals from water-alcohol suspension including aluminum hydroxide (boehmite, AlOOH), cerium nitrate, and one or several inorganic salts of platinum group metals. Coated material is then dried and subjected to heat treatment and reduction. According to invention, aforesaid suspension contains boehmite and cerium nitrate at 1:2 ratio and further contains reducing disaccharide so that suspension has following composition, wt %: AlOOH 18-20, Ce(NO3)3·6H2O 36-40, one or several platinum group metal salts (e.g., H2PtCl6, PdCl3, or RhCl3 calculated as metals) 1.5-1.8, reducing disaccharide 5-6, and water/alcohol (between 5:1 and 10:1) the rest. Thus obtained catalyst for treating internal combustion engine exhaust gases is characterized by: specific surface area of coating 80-100 m2/g, Al2O3 content 2.5-6.5%, CeO2 content 2.5-6.5%, active phase (calculated for platinum group metals) 0.2-0.4%, and block carrier to 100%.

EFFECT: simplified technology due to reduced number of technological stages and shortened process time, and enabled preparation of high-activity catalyst.

6 cl, 1 tbl, 8 ex

Ruthenium catalysts // 2322293

FIELD: hydrogenation-dehydrogenation catalysts.

SUBSTANCE: invention relates to novel ruthenium catalysts, method for preparation thereof, and to employment thereof for catalytic hydrogenation of mono- and oligosaccharides in production of corresponding sugar alcohols. Ruthenium hydrogenation catalyst contains ruthenium supported by amorphous silica-based carrier, content of ruthenium being 0.2 to 7% of the weight of carrier, while carrier contains at least 90% silica and less than 10% of crystalline silicon dioxide phases. Catalyst is prepared by single or multiple treatment of carrier material with halogen-free solution of low-molecular weight ruthenium compound and subsequent drying of treated material at temperature not lower than 200°C immediately followed by reduction of dried material with hydrogen at 100 to 350°C. Herein disclosed is also a process for liquid-phase production of sugar alcohols (excepting sorbitol) via catalytic hydrogenation of corresponding mono- and oligosaccharides in presence of proposed catalysts.

EFFECT: increased activity and selectivity of catalysts.

16 cl, 4 tbl, 7 ex

FIELD: petrochemical processes and catalysts.

SUBSTANCE: invention relates to the area of production of olefin hydrocarbons via catalytic dehydrogenation of corresponding C3-C5-paraffin hydrocarbons and can be applied in chemical and petrochemical industries. C3-C5-Paraffin hydrocarbon dehydrogenation catalyst is described containing chromium oxide, alkaline metal oxide, transition metals, and carrier, said carrier being nanostructured oxygen-containing aluminum compound of general formula: Al2O3-x(OH)x*nH2O, wherein x=0-0.28 and n=0.03-1.8, consisting of nanostructured primary particles 2-5 nm in size and characterized by disordered/imperfect layered structure similar to byerlyte structure. Method of preparing this catalyst as well as process of dehydrogenating C3-C5-paraffin hydrocarbons into olefins are also described, the latter being conducted in fluidized bed of described catalyst, which is recycled within the circuit: dehydrogenation reactor - regeneration reactor.

EFFECT: increased mechanical strength at high catalytic activity and stability.

20 cl, 1 dwg, 2 tbl, 10 ex

FIELD: alternative fuels.

SUBSTANCE: invention relates to catalysts and process of steam conversion of hydrocarbons to produce synthesis gas. Proposed catalyst for steam conversion of hydrocarbons contains nickel oxide (4.0-9.2%) and magnesium oxide (4.0-6.5%) supported by porous metallic nickel (balancing amount). Carrier has specific surface area 0.10-0.20 m2/g, total pore volume 0.07-0.12 cm3/g, predominant pore radius 1-30 μm, and porosity at least 40%. Described are also catalyst preparation method and generation of synthesis gas via steam conversion of hydrocarbons.

EFFECT: increased heat conductivity of catalyst resulting in stable activity in synthesis gas generation process.

8 cl, 1 tbl, 5 ex

FIELD: alternative fuels.

SUBSTANCE: invention relates to autothermal conversion of hydrocarbon fuel to produce synthesis gas, which can be used in chemical production, for burning at catalytic heat plants, and in hydrogen power engineering. Proposed catalyst contains, as active components, cobalt oxide, manganese oxide, and barium oxide, and, as carrier, refractory reinforced metalporous carrier. Catalyst is prepared by impregnation of carrier with barium and manganese salt solution at Ba/Mn =5:4 followed by drying, calcination, impregnation with cobalt salt solution, drying, and calcination. Invention further describes generation of synthesis gas via autothermal conversion of hydrocarbon fuel performed utilizing above-described catalyst.

EFFECT: enabled catalyst exhibiting high heat conductivity, high activity in production of synthesis gas, and resistance to coking and deactivation with sulfur compounds present in diesel fuel and gasoline.

6 cl, 1 tbl, 3 ex

FIELD: petrochemical processes and catalysts.

SUBSTANCE: invention provides isodewaxing catalyst for petroleum fractions containing supported platinum and modifiers wherein supporting carrier is fine powdered high-purity alumina mixed with zeolite ZSM 5 in H form having SiO2/Al2O3 molar ratio 25-80 or with zeolite BETA in H form having SiO2/Al2O3 molar ratio 25-40 at following proportions of components, wt %: platinum 0.15-0.60, alumina 58.61-89.43, zeolite 5-40, tungsten oxide (modifier) 1-4, and indium oxide (modifier) 0.24-0.97. Preparation of catalyst comprises preparing carrier using method of competitive impregnation from common solution of platinum-hydrochloric, acetic, and hydrochloric acids followed by drying and calcinations, wherein carrier is prepared by gelation of fine powdered high-purity alumina with the aid of 3-15% nitric acid solution followed by consecutive addition of silicotungstenic acid solution and indium chloride solution, and then zeolite ZSM 5 in H form having SiO2/Al2O3 molar ratio 25-80 or with zeolite BETA in H form having SiO2/Al2O3 molar ratio 25-40.

EFFECT: increased yield of isoparaffin hydrocarbons.

7 cl, 2 tbl, 7 ex

FIELD: hydrogenation-dehydrogenation catalysts.

SUBSTANCE: invention relates to a method for preparing spherical supported metal catalysts with metal content from 10 to 70%, to spherical metal catalyst, to a process of hydrogenation of aromatic compounds wherein the latter are hydrogenised using spherical metal catalyst, and to a process of hydrogenation of aromatic compounds wherein the latter are hydrogenised using spherical supported metal catalyst.

EFFECT: increased activity and selectivity of catalyst having high porosity and uniform pore size distribution.

13 cl, 5 tbl, 12 ex

FIELD: reduction-oxidation catalysts.

SUBSTANCE: invention relates to mono- and bimetallic palladium and platinum catalysts if carbon carriers that can be used in processes involving oxygen and/or hydrogen. A method for preparing catalyst is described comprising pretreatment of carbon carrier in 3-15 M nitric acid at temperature not exceeding 80°C, impregnation of resulting carrier by nitric acid solutions of chloride-free compounds of palladium and/or platinum or palladium and at least one group I metal, drying at temperature up to 105°C, decomposition at 150-350°C, and reduction in hydrogen flow at 110-350°C. Specified preparation conditions allow one to obtain fine particles of platinum group metals 1-10 nm in size localized in pores 2-20 nm in size, concentrations of deposited palladium and/or platinum being 3 to 50 wt % or palladium and/or platinum and silver 0.1 to 1.4 wt %. Catalyst is suitable for use in processes of oxidation of alcohols into aldehydes and carboxylic acids; hydrogenation of olefin, acetylene, and diene bonds in aliphatic and carbocyclic compounds; hydrogenation of nitro compounds into amines or intermediate compounds; disproportionation of abietic and other resin acids contained in colophony and similar natural- or artificial-origin mixtures.

EFFECT: augmented assortment of redox catalysts and optimized methods of preparation thereof.

8 cl, 1 tbl, 34 ex

FIELD: chemical industry; non-ferrous metallurgy industry; other industries; methods of production of the catalyst for oxidization of the vanadium oxide particles in the gaseous phase with the definite size distribution.

SUBSTANCE: the invention is pertaining to the method of production of the catalyst for oxidization in the gaseous phase of the vanadium oxide particles with the definite size distribution. The invention describes the method of production of the catalyst for oxidization in the gaseous phase, at which on the fluidized inert carrier they deposit the suspension of TiO2 and V2O5 particles, in which, at least, 90 volumetric % of the particles of V2O5 have the diameter of 20 microns or less and, at least, 95 volumetric % of the particles of V2O5 have the diameter of 30 microns or less. The technical result of the invention is that the certain particle-size distribution allows to achieve the high efficiency of the coating.

EFFECT: the invention allows to achieve the high efficiency of the coating.

6 cl, 2 ex

FIELD: waste water treatment.

SUBSTANCE: method comprising deposition of active components onto polymer carrier followed by washing with modifying solution and drying of resulting catalyst is characterized by that above-mentioned polymer carrier is a super-crosslinked polystyrene preliminarily washed with acetone and dried, deposition of active components onto polymer carrier is accomplished by impregnating it for 8-10 min with complex solution of platinum group metal chloride and/or gold-hydrochloric acid sodium salt in concentration 0.57-64.5 g/L in complex organo-alcohol-water solvent containing, in particular, tetrahydrofurane, methanol, and water, whereupon catalyst id dried to constant weight and then optionally washed with modifying solution of sodium carbonate, 2.76-136.74 g/L, and with distilled water to neutral pH = 6.8-7.2. Catalyst allows deep oxidation of phenol compounds at high degree of conversion.

EFFECT: enhanced phenol oxidation activity of catalyst, simplified catalyst preparation technology needing utilization of lesser amounts of expensive chemicals.

3 cl, 3 tbl, 18 ex

FIELD: alternative fuels.

SUBSTANCE: invention relates to catalysts and process of steam conversion of hydrocarbons to produce synthesis gas. Proposed catalyst for steam conversion of hydrocarbons contains nickel oxide (4.0-9.2%) and magnesium oxide (4.0-6.5%) supported by porous metallic nickel (balancing amount). Carrier has specific surface area 0.10-0.20 m2/g, total pore volume 0.07-0.12 cm3/g, predominant pore radius 1-30 μm, and porosity at least 40%. Described are also catalyst preparation method and generation of synthesis gas via steam conversion of hydrocarbons.

EFFECT: increased heat conductivity of catalyst resulting in stable activity in synthesis gas generation process.

8 cl, 1 tbl, 5 ex

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