Copper-zinc-chrome-aluminium catalyst production method

FIELD: chemistry.

SUBSTANCE: invention can be used for low-temperature methanol synthesis, hydrogenation of nitrobenzene, dehydrogenation of cyclohexanol to cyclohexanone in caprolactam production. A method of producing a copper-zinc-chromium-aluminium catalyst is carried out by mixing a solution of ammonium carbonate complex of copper with zinc and aluminium compounds followed by drying, calcining, and pelletizing the catalyst mass, characterized zinc oxide and powder of aluminium oxide γ-modified with a grinding of less than 100 µm is gradually introduced into the ammonia-carbonate complex solution of copper, the resulting suspension with a ratio of solid: liquid, equal to 1.0:(12.0-15.0) is heated under stirring in the temperature range of 60-90°C to obtain a mass ratio solid: liquid equal to 1.0:(0.01-0.5), then chromic anhydride or an aqueous solution is introduced, the formed chromium-containing mass is homogenized at a temperature in the interval of 70-90°C, dried, calcined at a temperature of generating a catalyst in which chromium is in the oxidation state of Cr3+ and Cr6+, and the content of Cr6+ and Cr3+ is in relation Cr6/Cr3+, equal to 0.13 and 0.8, preferably 0.39-0.55, and pelletized.

EFFECT: creation of a simple and economical technology for the preparation of a mixed copper-zinc-chromium-aluminium catalyst, which does not have harmful wastewater and gas emissions, and provides a highly active stable catalyst.

2 tbl, 19 ex

 



 

Same patents:

Reforming catalyst // 2558150

FIELD: chemistry.

SUBSTANCE: invention relates to method of reforming with application of catalyst. Described is method of reforming hydrocarbons with water vapour, including contact of supplied gas in reactor of catalytic partial oxidation or installation for autothermal reforming. Reactor operates at temperature 800-1600°C and pressure of 20-100 bar. Egg shell type catalyst, consisting of active compound in form of alloy of nickel and one metal from iridium and ruthenium, on supporter, containing aluminium oxide, zirconium dioxide, magnesium oxide, titanium dioxide or their combinations. Catalyst has cylindrical shape and has one or several through holes, where distance from centre to external catalyst surface constitutes from 10 to 40 mm, catalyst height constitutes from 10 to 40 mm, with diameter of one or several through holes constituting from 3 to 30 mm. At least 90 wt % of iridium or ruthenium in catalyst are located in external envelope which has depth up to 10% of external catalyst surface or to 10% of periphery of one or several through holes of catalyst.

EFFECT: realisation of method of catalytic partial oxidation or autothermal reforming at reduced drop of pressure in catalyst layer without reduction of catalyst activity.

12 cl, 5 dwg, 2 tbl, 5 ex

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of petrochemistry and more specifically to a method of producing synthesis gas which is used as the feedstock, for example, for the synthesis of methanol, dimethyl ether, hydrocarbons by Fischer-Tropsch method. The method of producing synthesis gas comprises oxidative conversion of methane-containing gas at a temperature more than 650°C in through-flow riser, using as oxidant the microspherical or crushed catalyst based on metal oxides, capable of multiple redox transitions, at that the catalyst is continuously passed through the riser upwards in the methane-containing gas flow with a residence time of the feedstock in the reaction zone of 0.1-10 s, separating the catalyst passing from the reactor from the product and regeneration of the catalyst by oxidation with carbon dioxide in the regenerator from which the regenerated catalyst enters the reactor. The oxidative conversion of methane-containing feedstock and regeneration of regenerated catalyst is carried out simultaneously and continuously.

EFFECT: invention enables to improve the removal rate of the product, to reduce energy consumptions for transportation of oxygen-containing agent, to reduce the risk of explosion and ignition, as well as to adjust the composition of the synthesis gas.

7 cl, 1 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention can be used in obtaining hydrogen from reagents, including liquid hydrocarbons, gaseous hydrocarbons and/or oxygen-containing compounds, including those, obtained from biomass, and their mixture. In order to obtain hydrogen used are: section of reagents heating; section of catalytic partial oxidation with short contact time, in which synthesis-gas is obtained; section of heat recuperation; section of converting carbon monoxide, present in synthesis-gas, into carbon dioxide by reaction of water gas conversion; section of said carbon dioxide removal; section of condensate cooling and removal.

EFFECT: invention makes it possible to obtain H2 and CO2 of high purity and purge gas with average heat-generating ability, which can be used in combustion processed and/or introduced into installation fuel supply system.

17 cl, 2 dwg, 5 tbl, 5 ex

FIELD: chemistry.

SUBSTANCE: a copper-chromium-zinc catalyst for heterogeneous reactions, which includes copper, chromium, zinc and aluminium oxides and an additional component is disclosed. The catalyst contains, as the additional component, 0.5-5 wt % of a silicon compound with respect to the oxide and the catalyst is formed via heat treatment of aluminium hydroxide together with compounds of said components, and has a porous structure with total specific pore volume of not less than 0.25 cm3/g and content of mesopores with a diameter of 10-40 nm higher than 60%, and the catalyst has the following composition, with respect to oxides, wt %: CuO 50.0-57.0; Cr2O3 11.0-16.0; ZnO 9.5-13.0; SiO2 0.5-5.0; aluminium oxide - the balance.

EFFECT: forming a copper-chromium-zinc catalyst having high strength, thermal stability and which can be used in different chemical processes.

6 cl, 2 tbl, 8 ex

FIELD: oil and gas industry.

SUBSTANCE: invention can be used during HCs production from natural or associated petroleum gas. Method of oxygenates cleaning from reaction water generated at stage of HCs synthesis from syngas during GTL process includes conversion of even part of the contained oxygenates under conditions of syngas chilling by even part of the reaction water at temperature over 500°C upon contact with catalyst of the oxygenates steam conversion. Further syngas cooling temperature below 400°C is performed by the cleaned water injection in the syngas flow. Method of use of the reaction water generated at stage of HCs synthesis from syngas during GTL process includes its cleaning of the oxygenates under conditions of the syngas chilling at temperature over 500°C upon contact with catalyst of the oxygenates steam conversion, cleaned water degassing. The cleaned degassed water is used to cool the syngas to temperature below 400°C and produce the water steam.

EFFECT: invention ensures effective cleaning of the reaction water of the oxygenates, and use of the produced cleaned water as feed water for boilers and water steam production.

4 cl

FIELD: chemistry.

SUBSTANCE: invention refers to a system for hydrogen development and a method for controlled hydrogen development. A method consists in carrying out a reaction of a metal agent selected in alkali metals, alkali earth metals, alloys and mixtures consisting of alkali metals, alkali earth metals, alloys consisting of at least one alkali metal, and at least one alkali earth metal with water for producing hydrogen and a residual product of reaction in the form of metal hydroxide specified in alkali hydroxides and alkali earth hydroxides; the metal agent is condensed by heating in vacuum; the liquid metal agent is supplied into a homogeneous reactor by extrusion by means of feed units, and water is simultaneously supplied to maintain a stoichiometric ratio of water in accordance with an amount of the liquid metal agent; the hydrogen and residual product are transported into the separation units and separated; separated hydrogen is transported into a hydrogen receiver; the residual reaction product is transported into a metal hydroxide receiver; the oxygen ingress into the metal agent feed units, water feed system, reactor, separators and hydrogen receiver by the selective use of vacuum.

EFFECT: developing the method for controlled hydrogen development.

22 cl, 5 dwg, 4 tbl

FIELD: chemistry.

SUBSTANCE: disclosed is a copper-zinc catalyst, which includes copper, zinc and aluminium oxides and an additional silicon compound. The catalyst contains 0.5-5.0 wt % of a silicon compound, with respect to the oxide, which is mixed with copper and zinc oxides. The catalyst is formed via heat treatment of aluminium hydroxide together with compounds of said components and has a porous structure with total specific pore volume of not less than 0.25 cm3/g and content of mesopores with a diameter of 10-40 nm higher than 60%, and the catalyst has the following composition, with respect to oxides, wt %: CuO - 40.0-55.0; ZnO - 24.0-35.0; SiO2 - 0.5-5.0; AlO3 - the balance.

EFFECT: forming a copper-zinc catalyst having high strength and thermal stability.

5 cl, 3 tbl, 8 ex

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to the production process of synthetic gas by hydrocarbon conversion, and namely to processes of oxidative conversion. The synthetic gas is produced at the combustion of a hydrocarbon stock with an oxidiser with the oxidiser excess coefficient less than 1 at a temperature less than 1400 K inside a cavity formed partially or completely by a three-dimensional matrix permeable for the mixture of the gas and oxidiser. Input of the hydrocarbon stock with the oxidiser is made through a permeable bottom of the cavity or through permeable walls and bottom of the cavity, while the output of combustion products is made through the upper cross-section of the cavity. Before input to the cavity the mixture of the gas and oxidiser or one gas of the mixture partially or completely is heated by heat produced by combustion products. The matrix is heated additionally by heat radiation reflected from the screen placed in the matrix cavity and permeable for the combustion products.

EFFECT: increased efficiency due to the increased output of the synthetic gas at the usage of hydrocarbon mixtures with the high content of non-combustible products having a low calorific value.

2 cl, 7 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: claimed invention relates to a method of obtaining olefins, including a) steam cracking of an ethane-including raw material in the zone of cracking and under conditions of cracking with obtaining a flow discharged from the zone of cracking, which includes, at least, olefins and hydrogen; b) conversion of the oxygenated raw material in the zone of conversion of oxygenate to olefins in the presence of a catalyst with obtaining a flow, consisting of, at least, olefins and hydrogen, discharged from the oxygenate-to-olefins (OTO) flow; c) combination of, at least, a part of the flow, discharged from the zone of cracking and a part of the flow, discharged from the OTO zone with obtaining a combined output flow; and d) separation of hydrogen from the combined output flow, with the formation of, at least, a part of the oxygenated raw material due to the supply of hydrogen, obtained at stage d), and the raw material, containing carbon oxide and/or carbon dioxide, into the zone of oxygenates synthesis and obtaining oxygenates. The invention also relates to a combined system for the claimed method realisation.

EFFECT: claimed invention makes it possible to obtain target products by the improved combined method of ethane cracking and OTO technology.

8 cl, 1 dwg, 5 tbl, 1 ex

FIELD: power industry.

SUBSTANCE: method includes adding of raw gas mix into a set of pipes containing the catalyst into reforming-furnaces, execution of reforming reaction for formation of the reformat containing H2, CO, CH4 and H2O, withdrawal of reformat, burning of fuel with heated gas oxidiser in the reforming-furnace combustion chamber unit, for obtaining of a gaseous combustion product and generation of heat for the purpose of power supply of raw gas mix reaction in pipes, combustion product withdrawal, heating of gas oxidiser by heat exchange with the combustion product, with obtaining of heated gas oxidiser, cooling of the combustion product, heating of the first feeding water flow by heat exchange with the combustion product, with combustion product cooling. Before this from the combustion product the heat is withdrawn for gas oxidiser heating, heating of the second feeding water flow by heat exchange with reformat, supply of the first and second feeding water flows into the deaerator, separation of dissolved gases from flows in the deaerator, withdrawal of the ventilating flow from the deaerator, withdrawal of flow of water feeding the boiler from the deaerator, formation of hydrogenous product from the reformat after heating by reformat of the second feeding water flow, and formation of steam product from part of the flow of water feeding the boiler.

EFFECT: increased amount of withdrawn steam.

17 cl, 3 dwg

FIELD: chemistry.

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

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

2 cl, 1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: apparatus for producing a catalyst comprises a reservoir designed for preparing an aqueous mixed solution containing Mo compound, V compound and Nb compound, a dryer designed to spray-dry the aqueous mixed solution and a pipe for connecting the reservoir with the dryer such that the aqueous mixed solution can be fed from the reservoir into the dryer. In the apparatus, a heater designed to heat the aqueous mixed solution is mounted in the reservoir and/or the pipe, and a filter designed to filter the aqueous mixed solution is installed in the pipe. The apparatus and methods of producing a catalyst provide uniform supply of the prepared aqueous mixed solution into the dryer.

EFFECT: catalyst is then used in a method of producing an unsaturated acid or unsaturated nitrile.

20 cl, 6 dwg, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst composition for selective catalytic reduction of exhaust gas. The catalyst composition contains a vanadate of formula XVO4/S, where XVO4 denotes a vanadate of Bi, Sb, Ga and/or Al, optionally in a mixture with one or more vanadates of rare-earth metals, or in a mixture with one or more vanadates of transition metals, or in a mixture with one or more vanadates of transition metals and one or more vanadates of rare-earth metals, and S is a support which includes TiO2. A method of producing the catalyst composition is also disclosed.

EFFECT: improved heat resistance and improved NOx conversion activity of the supported catalyst composition.

13 cl, 1 dwg, 8 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: disclosed is a copper-zinc catalyst, which includes copper, zinc and aluminium oxides and an additional silicon compound. The catalyst contains 0.5-5.0 wt % of a silicon compound, with respect to the oxide, which is mixed with copper and zinc oxides. The catalyst is formed via heat treatment of aluminium hydroxide together with compounds of said components and has a porous structure with total specific pore volume of not less than 0.25 cm3/g and content of mesopores with a diameter of 10-40 nm higher than 60%, and the catalyst has the following composition, with respect to oxides, wt %: CuO - 40.0-55.0; ZnO - 24.0-35.0; SiO2 - 0.5-5.0; AlO3 - the balance.

EFFECT: forming a copper-zinc catalyst having high strength and thermal stability.

5 cl, 3 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: method of preparing a catalyst for cracking vacuum gas oil with controlled output of C3 and C4 olefins includes mixing an ultrastable zeolite Y in cation-decationated form and zeolite HZSM-5 with matrix components in the form of amorphous aluminosilicate, aluminium hydroxide and bentonite clay, spray drying the obtained composition, followed by calcination and obtaining a catalyst. Before mixing with catalyst components, aluminium hydroxide is treated with orthophosphoric acid to achieve phosphorus content with respect to aluminium oxide of 1 to 10 wt %. Content of the catalyst components is as follows, wt %: zeolite NRZEU 10-20, zeolite HZSM-5 2-20, aluminium hydroxide treated with orthophosphoric acid 10-20, amorphous aluminosilicate 28-38, bentonite clay 15-25.

EFFECT: obtaining a highly active catalyst, which provides controlled output of light C3-C4 olefins.

2 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to the field of selective catalytic reduction of nitrogen oxides, namely to a material of a carrier for the catalyst, used in the said process. The claimed carrier material represents particles of anatase titanium dioxide, including ≥85% by dry weight of TiO2 and ≤10% by dry weight of SiO2, with (i) SiO2 being mainly in the form, selected from the group, consisting of forms with the low molecular weight, nanoparticles and their combinations; and (ii) at least 50% of silicon atoms being in states Q3, Q2, Q1 and Q0 of the coordination environment. The invention also relates to a catalytic device for the neutralisation of Diesel exhaust, including such particles, a system for Diesel exhaust regulation, including the said catalytic device, a method in which the conversion of nitrogen oxides is catalysed in the presence of the claimed particles of anatase titanium dioxide, as well as to methods of obtaining the said particles.

EFFECT: claimed particles make it possible to increase the thermal stability of the final catalyst with the preservation or increase of the catalytic activity for the selective catalytic reduction of nitrogen oxides from mobile devices, operating on lean mixtures.

44 cl, 18 dwg, 15 tbl, 18 ex

FIELD: chemistry.

SUBSTANCE: invention relates to an ammonia synthesis catalyst. Said catalyst is a supported metal catalyst which is deposited on a mayenite-type compound, containing conduction electrons in concentration of 1015 cm-3 or higher and serving as a support for the ammonia synthesis catalyst. The invention also relates to a method of producing said catalyst and an ammonia synthesis method using said catalyst.

EFFECT: disclosed catalyst enables synthesis of ammonia with high efficiency in mild conditions.

7 cl, 1 dwg, 4 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of preparing a catalyst for producing a component of environmentally safe hydrocarbon-based drilling mud, having a boiling range of 188-304°C according to ASTM D 86, which includes preparing a paste from gel obtained by mixing boehmite Pural SB with a mixture of nitric acid and distilled water, triethylene glycol and zeolite HY with molar ratio SiO2/AlO3 equal to 30 or 60, the porous structure of which is a system of interconnected straight channels formed by 12-member rings with diameter of the entrance window of 7E, extrusion, holding at room temperature for 9-10 hours, drying, grinding to particle size of 2-4×2 mm and calcining. The invention also relates to a catalyst for producing a component of environmentally safe hydrocarbon-based drilling mud and a method of producing said component.

EFFECT: simple technique, low cost of production while maintaining physical and chemical properties and improved performance in a wide temperature range, cetane number of not more than 45, and complete absence of aromatic, amine- and sulphur-containing compounds.

7 cl, 6 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: described is a method of producing an aluminium-chromium catalyst by mixing an aluminium support with a suspension having clay mineral concentration of 28-37 wt % and with aqueous solutions of chromic acid and potassium alkali. The aluminium-chromium support has specific surface area of not less than 80 m2/g, contains not more than 30 wt % particles with size of less than 45 mcm, not more than 10 wt % particles with size of less than 20 mcm and not more than 1.0 wt % particles with size of more than 140 mcm. The obtained catalyst suspension is then spray dried. Also described is an aluminium-chromium catalyst which includes 12.0-16.0 wt % Cr2O3, 8.0-13.0 wt % SiO2, 2.0-3.6 wt % K2O and Na2O or only K2O, Al2O3 - the balance, where content of hexavalent chromium is 1.7-2.2 wt %.

EFFECT: obtaining a catalyst with a uniform composition, high mechanical strength, catalytic activity, selectivity and stability in processes of hydrogenating paraffin hydrocarbons into corresponding olefin hydrocarbons.

4 cl, 1 tbl, 13 ex

FIELD: chemistry.

SUBSTANCE: group of inventions relates to catalytic materials for chemical reactors. Said catalytic materials contain hybrid inorganic/polymer carriers and preliminarily obtained molecular catalysts immobilised on them. Hybrid inorganic/polymer carrier consists of hybrid inorganic/polymer compound, in which organic polymers are chemically bound with at least one inorganic compound, selected from the group, consisting of silicic acid compound, tungstic acid compound, molybdic acid compound and stannic acid, and immobilised preliminarily obtained molecular catalyst contains at least one atom or ion of transition metal, selected from groups IB, IIB, IIIB, IVB, VB, VIB, VIIB, VIII of periodic system of elements, which one or several ligand(s) is(are) bound with.

EFFECT: claimed catalytic material acts as heterogenic catalyst with selectivity, comparable with selectivity, observed in homogenous phase, with said catalyst being insoluble in reaction solvent and easily removable from reaction mixture.

27 cl, 3 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: claimed is a method of obtaining a catalyst of carbon oxide oxidation, which includes mixing manganese dioxide and copper oxide simultaneously with the preparation of copper oxide with an addition of caustic sodium and copper sulphate to the suspension of manganese dioxide, addition of a binding substance of bentonite clay, formation of granules, drying, crushing and thermal processing, with the preparation of copper oxide with an addition of caustic soda and copper sulphate to the suspension of manganese dioxide being carried out in several stages by equal parts, and the total time of the copper sulphate addition constitutes 1-3 hours.

EFFECT: increase of the catalytic activity of the catalyst in carbon oxide oxidation.

1 tbl, 4 ex

Up!