Method of preparing catalyst for dehydrogenation of cyclohexanol into cyclohexanone

FIELD: chemistry.

SUBSTANCE: method includes depositing an active component - copper - from an aqueous solution of an ammonia-carbonate complex on an oxide solid support, heat treatment and granulation. Deposition of the active component is carried out on an oxide solid support consisting of a mixture of white soot and boehmite in weight ratio of (2.5-3.5):1, and granulation of the catalyst paste is carried out by extrusion.

EFFECT: method enables to obtain a catalyst with high thermal stability while maintaining high selectivity and activity.

1 tbl, 4 ex

 



 

Same patents:

FIELD: chemistry.

SUBSTANCE: claimed invention relates to a method of obtaining saturated aliphatic ketone, represented by the general formula (2), (where n stands for an integer number from 1 to 3; R represents a hydroxyl group, a cyclohexyl group, an alkyl group, which has from 1 to 4 carbon atoms, or an acyl group, which has from 1 to 4 carbon atoms), applied as an initial material for the production of medications, agrochemical preparations, optic functional materials and functional materials for electronics. The method consists in hydrogenation of a nucleus of an aromatic ketone, represented by the general formula (1), (where n stands for an integer number from 1 to 3; R represents a hydroxyl group, a phenyl group, an alkyl group, which has from 1 to 4 carbon atoms, or an acyl group, which has from 1 to 4 carbon atoms), with hydrogen under pressure in the presence of a solvent at a temperature from 20 to 120°C and in the presence of a catalyst, which carries from 0.1 to 20 wt % of the ruthenium atom on a carrier.

EFFECT: method makes it possible to obtain the target product with high selectivity.

6 cl, 24 ex

FIELD: chemistry.

SUBSTANCE: invention concerns method of cyclic alkane oxidation by oxidation agent for obtaining a product, where oxidation is performed in cracking fractionator including vat zone at bottom end, head zone at top end, and reaction zone between vat and head zones. Reaction mix is kept boiling in reaction zone, and oxidation agent is added into reaction zone in at least two split flows. Non-reacted raw material leaving reaction zone is recycled into reaction zone. Gas containing molecular oxygen is used as oxidation agent, and reaction mix containing target product is collected below reaction zone.

EFFECT: simple and cost-effective method of obtaining the product, enhanced conversion of source material and selectivity of target product generation.

6 cl, 1 dwg, 3 ex

FIELD: industrial organic synthesis.

SUBSTANCE: invention relates to production of cyclohexanol or cyclohexanone via hydrogenation of phenol or benzene with hydrogen in presence of catalyst and diluent followed by hydration in case of using benzene as starting material. Process is characterized by that hydrogen and benzene or hydrogen and phenol preheated in heat exchanger, provided with condensate intake control circuit, and circulation gas are supplied to vaporizer and preheater, provided with heating steam consumption control circuits, through supply lines provided with shutoff valves. Phenol or benzene and circulation gas, as well as heating steam and condensate consumptions are specified and adjusted. Preheated mix is then fed into separator to separate gas from liquid phase, which is removed, while remaining gas mixture is sent to hydrogenation reactors comprising temperature control zones and heat-extracting tube-type condensers and provided with phenol or benzene, hydrogen and condensate control circuits, temperature sensors connected to controllers to adjust consumptions of phenol or benzene, hydrogen and condensate, and wherein diluent volume level compared to that of catalyst is controlled and hydration temperature is measured. Resulting product enters cooler and then separation column provided with cyclohexanol or cyclohexanone recovery level control and adjusting, wherefrom it is directed to gas circulation line comprising cooler, separator, and compressor equipped with pipelines with circulation gas consumption control circuits.

EFFECT: increased productivity with regard to cyclohexanol or cyclohexanone.

2 dwg

The invention relates to an improved method of decomposition of the hydroperoxide with the formation of a mixture containing the corresponding alcohol and ketone, comprising the stage of: a) adding water in the amount of 0.5-20% in the mixture containing the hydroperoxide; (b) the deletion of specified volume of water in such a way that together with water removes water-soluble impurities; C) removing the remaining water in such a way that the reaction mixture is not more than 2% of water; and (d) decomposition of the specified hydroperoxide by contacting the reaction mixture with a catalytic amount of a heterogeneous catalyst containing gold, supported on a carrier

FIELD: chemistry.

SUBSTANCE: invention relates to catalytic systems based on organophosphorous compounds, complex-forming, suitable for hydrocyanation and hydroformylation of alkenes of formulas M[Lf]t(V) or HM[Lf]t+nCO4-n(VI), where M is transition metal, t is number from 1 to 10, n is number from 1 to 4, Lf stands for organofosphorous ligand of formulas:

or ,

where R1, R2, R3, R4, R5, R7, Z stand for hydrogen atom, C1-12alkyl, phenyl, optionally substituted with 1-3 substituents, selected from C1-6-alkyl and hydroxy-C1-6-alkyl, or C1-12halogenalkyl; X, X1 and X2 stand for O or S, R6 stands for covalent bond, C6-aryl or several bound C6-aromatic cycles, n and n1, stand for valence X1, X2, reduced by 2.

EFFECT: claimed are novel effective catalysts of hydrocyanation and hydroformylation.

13 cl, 30 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: method involves: a) heterogeneously catalysed vapour-phase partial oxidation of a starting organic compound selected from propylene, propane, isobutylene, isobutane, acrolein or methacrolein with molecular oxygen in a parallel-functioning system of oxidation reactors containing catalysts, which results in formation of two gas streams respectively containing the desired compound and respectively formed in one of two systems of oxidation reactors, and b) subsequent extraction of the desired product from two streams of the obtained gas to form at least one stream of crude desired product according to which c) before extraction of two from two streams, the obtained gas is mixed with each other into a mixed stream. In case of change in selectivity of formation of the desired product and/or by-products during operation the entire amount or partial amount of catalyst is replaced in parallel with fresh catalyst not in all parallel-functioning systems of oxidation reactors in which end products contained in the mixed stream are formed.

EFFECT: improved method of obtaining acrolein, acrylic acid, methacrolein or methacrylic acid as the desired product.

2 cl, 4 tbl, 2 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention describes a novel method for synthesis of 1,2,4-triazole derivatives of the general formula (I): wherein R means radicals phenyl, benzyl, 4-phenylthiazole-2-yl or 4-methyl-5-carbethoxythiazole-2-yl; R1 means radicals acetyl, trifluoroacetyl, succinoyl, benzoyl, methylbenzoyl or toluenesulfonyl. Method involves addition of an acylating agent of the general formula (IV): R1X wherein R1 means abovementioned values; X means chlorine atom (Cl) or group OR1 wherein R1 means abovementioned values to a mixture of 3,5-diamino-1-R-1,2,4-triazole of the general formula (II): wherein R means abovementioned values, aprotonic solvent, for example acetonitrile or dimethylformamide, and an organic base (III) that represents triethylamine or pyridine. The interaction is carried out at temperature (-10)-(+120)°C and stirring in the mole ratio II : III : IV = 1.00:(1.15-1.40):(1.05-1.35), respectively. The proposed method provides preparing the end compound with high purity degree and without over consumption of reagents.

EFFECT: improved method of synthesis.

2 cl, 11 ex

The invention relates to a method for the acylation of aromatic compounds of the formula I

< / BR>
in which a represents the residue of the benzene cycle; radical or radicals R are identical or different and denote one of the following groups: alkyl, linear or branched, having 1-6 carbon atoms, preferably 1-4 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec.butyl, tert.butyl, alkoxy, linear or branched, having 1-6 carbon atoms, preferably 1-4 carbon atoms, such as methoxy, ethoxy, propoxy, isopropoxy, butoxy, a radical of the formula-R1-X, in which R1mean valence bond; X is a halogen atom, preferably a chlorine atom, bromine or fluorine, n is a number less than or equal to 4, preferably 0 or 1, by reaction of the compounds with allermuir agent of formula II

< / BR>
in which X' represents a chlorine atom and R3means alkyl, linear or branched, having from 1 to 12 carbon atoms, preferably 1-4 carbon atoms, in the presence of a zeolite catalyst, characterized in that carry out the mixing in any way aromaterapiey layer of catalyst, and recycle the reaction mixture was released from the catalytic layer, through the catalytic layer as many times as necessary to obtain the desired degree of conversion of the aromatic compounds

FIELD: chemistry.

SUBSTANCE: according to the present method, the feedstock for the catalyst is modified zeolite ferrierite which is moulded with a binder, said binder being aluminium oxides/hydroxides, with binder content of 15-50 wt % of the catalyst. The zeolite is modified by dealumination, washing with an aqueous acid solution and drying. Dealumination of the zeolite is carried out in an autoclave in the presence of solid anhydrous ammonium hexafluorosilicate of chemical formula (NH4)2SiF6 at 220-400°C for 0.5-10 hours. The weight ratio zeolite/anhydrous ammonium hexafluorosilicate is equal to 7-70. The zeolite is washed with 1-50% acid solution for 15-400 minutes at 20-100°C.

EFFECT: method enables to obtain catalysts with fewer defects in the form of extra-framework aluminium in zeolite channels, and also enables to remove diffusion barriers for passage of butene molecules in catalyst channels.

2 cl, 1 dwg, 1 tbl, 8 ex

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: invention relates to a method of preparing a catalyst for deep hydrofining of oil fractions. The present method includes impregnating an aluminium oxide support with a solution of compounds of metals of groups VIII and VI with pH of the impregnating solution of 1.5-5.0, vacuum treatment of the support before contact thereof with the impregnating solution, using impregnation at high temperature. The starting compounds used for preparing the impregnating solution are sodium salts Mo and one of modifiers X selected from the group (B, P, Si, V, Zn, Ge, Sn), which are soluble in water in molar ratio Mo/X=12/1, after which the solution is passed through a column with a cationite in H+ form and Co or Ni acetate is added to said solution.

EFFECT: disclosed method enables to obtain catalysts having high activity and selectivity with respect to hydrodesulfurisation, hydrodenitrogenation and hydrogenation of olefins and aromatic compounds.

2 cl, 5 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: method includes preparation of carrier by thermal processing at 500°C, application of alcohol film-generating solution by method of stretching at rate 100 mm/min, drying at 60°C for 1 h and annealing at 750°C for 4 h. Film-generating solution is applied on fibreglass carrier by method of soaking with further drying at 60°C for 1 h and annealing at 600-750°C for 1 h. Catalyst, which is obtained in form of cloth, is cut at output in accordance with reactor shape and packed in layers at angle of 20-30°, with formation of honeycomb structure, with the following component ratio in film-generating solution, wt %: Ce(NO3)3·6H2O - from 6.0 to 12.0, SnCl4·5H2O - from 16.6 to 22.3, C6H4OHCOOH - from 9.1 to 10.0, 96%-by weight C2H5OH - the remaining part.

EFFECT: method makes it possible to obtain catalysts, characterised by high permeability of gas mixture flow.

2 dwg, 4 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: engines and pumps.

SUBSTANCE: invention relates to a manufacturing method of a honeycomb ceramic unit for a catalytic neutraliser of exhaust gases, according to which to the ceramic unit from the main material there applied is a binding layer containing sodium silicate Na2O(SiO2)n or potassium silicate K2O(SiO2)n, or their mixture, above which there formed is at least one substrate layer for application of a catalyst, which contains a nanodispersed oxide of aluminium hydroxide (boehmite); for that purpose, a suspension layer is applied onto the second workpiece, which contains nanodispersed oxide of aluminium hydroxide; the workpiece with the applied suspension layer is dried; after that, the workpiece of the honeycomb ceramic unit with the applied substrate material is roasted, and therefore, a honeycomb ceramic unit for a catalytic neutraliser of exhaust gases is obtained. In addition, an application method of substrate onto the honeycomb ceramic unit for the catalytic neutraliser of exhaust gases, which applies this technology, is proposed.

EFFECT: improvement of passage of a gas flow through pores and channels of a substrate; increase and optimisation of a catalytic neutralisation process of substances in exhaust gases of diesel engines.

17 cl, 24 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method of preparing oxide-polymetallic catalysts, containing metals of platinum group, for oxidative-vapour conversion of hydrocarbons with obtaining carbon oxide and hydrogen. Method includes processing NiO and CO3O4 with solutions of nitrates Al, Ce, Zr and compounds of palladium Pd(NH3)4Cl2, platinum H2[PtCl6]·6H2O and rhodium H3[RhCl6], with the following drying; coking obtained material in methane flow at 550°C, obtaining paste from said material, pseudoboehmite and tetraisopropoxylane, filling foam-nichrome pores with suspension from obtained material, removal of water at 80°C, calcinations for 3 hours in argon atmosphere at 1300°C, removal of carbon with water vapours at 600°C for 3 hours.

EFFECT: creation of highly efficient heterogeneous catalyst.

4 cl, 7 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to extraction of metals from a stream rich in hydrocarbons and carbon-containing residues using a treatment area. The method includes the following steps: feeding said stream for primary treatment, which is carried out in one or more steps, where said stream is treated in the presence of a diluent in a mechanical treatment apparatus at temperature of 80-180°C, preferably 100-160°C, and is divided into a liquid phase and a solid phase to obtain a purified product, primary consisting of liquids, and a condensed residue (oil cake); optionally drying the separated condensed residue to remove therefrom a hydrocarbon component with a boiling point lower than 300-350°C; feeding the condensed residue, optionally dried, for secondary heat treatment, which includes: flameless pyrolysis of the condensed residue, carried out at 400-800°C; oxidising the pyrolysis residue, carried out in an oxidative medium and at 400-800°C, preferably 500-700°C, to obtain a product primarily consisting of sulphides/inorganic oxides of metals; selectively extracting metal components from the product obtained at secondary heat treatment step.

EFFECT: extracting and recycling the active component of an operating catalyst.

21 cl, 5 dwg, 8 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to catalyst of selective hydrodesulphurisation of olefin-containing hydrocarbon raw material. Said catalyst consists of compounds of metals Co or Ni, Mo and Na or K, applied on carrier. Claimed catalyst contains bimetal complex compound of metals Co or Ni, Mo and Na or K, carboxylic acid, containing, at least, one carboxyl group and 1-20 carbon atoms; it has specific surface 180-350 m2/g, volume of pores 0.3-1.1 cm3/g, average pore diameter 5.5-11.0 nm. Invention relates to method of preparing claimed catalyst, as well as to process of selective hydrodesulphurisation with its application.

EFFECT: claimed catalyst makes it possible to obtain petrol with ultralow content of sulphur and preservation of value of its octane number at initial level.

14 cl, 3 tbl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of preparing a catalyst for deep hydrofining of oil fractions. The present method includes impregnating an aluminium oxide support with a solution of compounds of metals of groups VIII and VI with pH of the impregnating solution of 1.5-5.0, vacuum treatment of the support before contact thereof with the impregnating solution, using impregnation at high temperature. The starting compounds used for preparing the impregnating solution are sodium salts Mo and one of modifiers X selected from the group (B, P, Si, V, Zn, Ge, Sn), which are soluble in water in molar ratio Mo/X=12/1, after which the solution is passed through a column with a cationite in H+ form and Co or Ni acetate is added to said solution.

EFFECT: disclosed method enables to obtain catalysts having high activity and selectivity with respect to hydrodesulfurisation, hydrodenitrogenation and hydrogenation of olefins and aromatic compounds.

2 cl, 5 tbl, 11 ex

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