The method of obtaining a mixture of alcohols c1-c6

 

(57) Abstract:

Use: in the manufacture of automotive fuel. The inventive product is C1-C6-alcohols containing water not more than 0.2 wt. Reagent 1: carbon monoxide. Reagent 2: hydrogen. Reaction conditions: temperature of 270 to 310°C., a pressure of 50 to 80 atmospheres in the presence of a catalyst obtained by termomaslyanym hydroxocobalamine structure type hydrozincite, in which the content items based on metals of copper 20 to 40 at. chromium or aluminum 5 to 15 at. zinc 45 75 at. cesium, potassium or sodium 0.1 to 5.0 at. table 2.

The invention relates to methods for nizkoatomnye linear alcohols from synthesis gas at pressures not exceeding 100 atmospheres in the presence of a catalyst.

The mixture of alcohols WITH1-C6from synthesis gas is currently an urgent task, as it allows to solve the problem of environmentally friendly and high-octane motor fuel by the use of alternative sources of raw materials by addition of alcohols (up to about 10.) to gasoline.

The main requirement for such mixtures is the low content of water (not more than 0.2 wt.), as a slight increase in water leads to stratification sestry [1, 2] methods for producing alcohols according to the Fischer-Tropsch synthesis with getting along with alcohols hydrocarbons, which leads to the formation of a condensate containing more than 30 wt. water. This requires removing water from a mixture of alcohols, which leads to a significant appreciation of the process.

Much smaller amount of water formed in the synthesis of alcohols occurring on catalysts for methanol synthesis, modified alkaline additives. First of all it processes carried out on a modified ZnO-Cr2O3-K2About catalyst at high pressures (up to 200 ATM) and high temperatures (350-390aboutC). The main products are methanol and Isobutanol, while ethanol and propanol are formed in small quantities. The water content in the condensate is 8-25 wt. depending on the process temperature [3]

In addition, for the synthesis of a mixture of methanol higher alcohols proposed CuO-ZnO-M2O3(M=Al, Cr, or Ga) catalysts with alkaline additives. Process them is carried out at lower temperatures and pressures (270-310aboutWith 50-80 ATM). The water content in the condensate is 3.0 wt. selectivity for alcohols 76-84% number of alcohols WITH2+di-zinc-chromium, the structure of which is identical to the structure of a natural mineral hydrotalcite with the formula Mg6Al2(OH)16CO3x4H2O. Gidroksicarbonat copper-zinc-chromium received by joint precipitation from solutions of the nitrate salts of the respective metals with sodium carbonate [4] (prototype). The main disadvantage of this process is the presence of water in the condensate in large numbers (up to 3 wt.), that does not allow direct use of alcohols as a high-octane additive to gasoline.

The problem solved by the invention from a synthesis gas mixture of alcohols WITH1-C6with a water content in the mixture is not more than 0.2 wt.

The proposed method of synthesis of alcohols is as follows: a Synthesis gas containing about 50-65. WITH, about 30-50. H2and about 10. N2passes through the catalyst bed at a temperature of 250-320aboutC and a pressure of 50-80 ATM. The resulting reaction products are cooled and separated into gaseous and liquid. The condensate consisting of a mixture of alcohols is the target product, and a gas mixture containing unreacted CO, CO2and a number of hydrocarbons, passes through the apparatus the removal of CO2and sent to the mixing with the source is or aluminum and alkaline additives, the number of components in terms of the metals is copper 20-40 at. zinc 45-75 at. chrome or aluminum 5-15 at. the amount of the alkaline additives in the form of potassium, sodium or cesium is 0.1 to 5.0 at.

The proposed method of synthesis is characterized by the fact that the catalyst for the synthesis of alcohols, the above composition, obtained by thermal decomposition of gidroksicarbonata copper-zinc-chromium (or aluminum) structure type hydrozincite [5] with the formula Zn5-x-yCuxCry(OH)6(CO3)2. thermal decomposition is carried out in a current of air at 300 to 400aboutC. To obtain gidroksicarbonata copper-zinc-chromium (or aluminum) with a specified structure is necessary at the stage of deposition to provide a chemical interaction of the components, which is achieved by joint precipitation of solutions of nitrates of metals (Cu, Zn, Cr or Al), mixed in a predetermined ratio, sodium carbonate under conditions of constant pH of 6.5-7.5 and temperature of 60-75aboutWith subsequent washing from sodium ions to content not more than 0.01%, the Introduction of the alkaline component in the catalyst is carried out by impregnation of the air-dried sample with a solution of alkaline carbonate ion in the given number. Then the catalyst was dried in air at 100aboutAnd though of carbon monoxide with hydrogen in the ratio of 2:1 at a temperature of 270aboutC and a pressure of 75 ATM. conversion WITH=30% volumetric gas flow rate (3000-5000 h-1.

The process is performed on the oxide catalyst containing ions of copper, zinc, chromium and cesium in at. Cs/C/Cr/Zn=1/40/15/45 received by termomaslyanym in a stream of air at a temperature of 350aboutFrom gidroksicarbonata copper-zinc-chromium with structure type hydrozincite.

The activity and selectivity of the process of synthesis of alcohols WITH1-C6are given in table. 1 and 2.

By analyzing the properties of the catalysts are given in table. 1 and 2, it can be noted that increasing the alkaline additives to 5% reduces the performance alcohols, however, the water content in the condensate practically does not depend on the content of the alkali ion.

Getting gidroksicarbonata with the specified structure is provided by the synthesis conditions and the ratio of components. Gidroksicarbonat copper-zinc-chromium formed by joint precipitation of metal ions from solutions of their nitrates solution of sodium carbonate at pH of 6.9 and a temperature of 75aboutC. Identification of patterns obtained gidroksicarbonata copper-zinc-chromium, carried out by the method of x-ray phase analysis showed that the structure of the compounds obtained completely identically the above.

The selectivity and efficiency of the process, as well as the water content in the condensate is given in table. 1, 2.

P R I m m e R 2. Analogously to example 1, but the ratio of the elements is Cs/Cu/Zn/Cr= 1/20/75/5, gidroksicarbonat copper-zinc-chromium with structure type hydrozincite obtained by precipitation at pH of 6.5, a temperature of 60aboutC, thermal decomposition was carried out at 300aboutC.

P R I m e R 3. Analogously to example 1, but instead of chromium used aluminum, gidroksicarbonat copper-zinc-chromium with structure type hydrozincite obtained by precipitation at pH of 7.5, a temperature of 70aboutC, thermal decomposition was carried out at 400aboutC.

P R I m e R 4. Analogously to example 1, but instead of cesium used potassium in an amount of 5 wt. in terms of metal.

P R I m e R 5. Analogously to example 4, but the amount of potassium is 0.1%

As you can see that all the catalysts obtained by termomaslyanym gidroksicarbonata copper-zinc-chromium (or aluminum) structure type hydrozincite, obepechivaet synthesis of alcohols with water content in the condensate is much smaller than that of the catalyst obtained by termomaslyanym of gidroksicarbonata copper-zinc-chromium with structure type hydrotalcite (prototype).

Thus, water which does not exceed 0.2% which allows to directly use the resulting alcohols as a high-octane additive to gasoline, thereby make the process of synthesis of alcohols economically advantageous as it does not require an additional stage of acceleration.

The use of alcohols in the composition of motor fuels will help to reduce 10-15% of the gasoline consumption, to refuse the use of carcinogenic tetraethyl lead antiknock several times to reduce the content of CO, hydrocarbons and nitrogen oxides in the exhaust gases of vehicles.

THE METHOD OF OBTAINING A MIXTURE OF ALCOHOLS C1-C6by the interaction of carbon monoxide with hydrogen at a temperature of 270 310oC, a pressure of 50 to 80 atmospheres in the presence of a catalyst containing both copper, zinc, chromium or aluminum) and one of the alkaline elements, characterized in that the use of a catalyst obtained by termomaslyanym hydroxocobalamine structure type hydrozincite, in which the content of the elements in terms of the metals is at.

Copper 20 40

Chrome or aluminum 5 15

Zinc 45 75

Cesium, potassium or sodium 0,1 5,0

 

Same patents:

The invention relates to the chemical, petrochemical and chemical industry and can be used in joint receipt of methanol and aliphatic alcohols WITH2-C4for their application as high-octane components of motor fuels

FIELD: industrial organic synthesis catalysts.

SUBSTANCE: invention relates to copper-containing catalysts for low-temperature synthesis of methanol in fluidized bed at median pressure and provides catalyst, whose preparation involves impregnation and which contains oxides of copper, zinc, chromium, magnesium, aluminum, boron, and barium and has following molar ratio: CuO:ZnO:Cr2O3, MgO:Al2O3:B2O3:BaO = 1:0.3:(0.014-0.038):(0.047-0.119):(0.05-0.1):(0.007-0.014):(0.0292-0.054).

EFFECT: increased mechanical strength and wear resistance of catalyst.

1 tbl

FIELD: industrial organic synthesis catalysts.

SUBSTANCE: invention relates to copper-containing catalysts for low-temperature synthesis of methanol in fluidized bed at low pressure and provides a wear-resistant catalyst, whose preparation involves impregnation and which contains oxides of copper, zinc, chromium, magnesium, aluminum, and boron and has following molar ratio: CuO:ZnO:Cr2O3, MgO:Al2O3:B2O3 = 1:0.3:(0.15-0.2):(0.1-0.025):(0.25-0.3):(0.08-0.1).

EFFECT: increased mechanical strength and wear resistance of catalyst.

1 tbl

FIELD: industrial organic synthesis catalysts.

SUBSTANCE: invention relates to copper-containing catalysts for low-temperature synthesis of methanol in fluidized bed at high pressure and provides catalyst, whose preparation involves impregnation and which contains oxides of copper, zinc, chromium, magnesium, aluminum, boron, and barium and has following molar ratio: CuO:ZnO:Cr2O3, MgO:Al2O3:B2O3:BaO = 1:(0.7-1.1):(0.086-0.157):(0.05-0.15):(0.125-0.2):(0.018-0.029):(0.04-0.075).

EFFECT: increased mechanical strength and wear resistance of catalyst.

1 tbl

FIELD: chemistry.

SUBSTANCE: method includes contact of gas mixture containing carbon oxides and hydrogen ballasted down with nitrogen with copper-containing catalyst under heating, pressure and definite rate velocity of feeding into reactor. Reactor unit consists of two adiabatic-type reactors connected with a pipeline; the original gas mixture containing CO - 10-15 % v/v, CO2 - 0.3-5.0 % v/v, H2 - 15-40 % v/v, N2 -40.0-74.7 % v/v and volumetric ratio H2/(CO+CO2) equal to 1.00-2.91, at 200-260°C and pressure 3.5-5.0 MPa with rate velocity 2000-5000 h-1 is fed into the first reactor with larger main part of unconverted gas fed to circulation and produced at the outlet of the second reactor cooled to 15-20°C and further purified to remove methanol in tower washer and compressed; then the reaction mixture from the first reactor is fed into the second reactor along with the rest minor part of circulating gas indicated above as quench - cold circulation gas fed into the pipeline between the two rectors.

EFFECT: method allows increasing methanol yield, efficiency of the process and reducing energy consumption.

4 cl, 3 tbl, 1 dwg, 1 exsid1190496

FIELD: chemistry.

SUBSTANCE: invention pertains to the method of methanol obtaining from a concentrated mixture of hydrogen and carbon oxides with the following components in vol %: H2 - 62.0-78.5; Ar - 0.02-0.07; N2 - 0.05-2.2; CH4 - 1.0-3.5; CO - 10.4-29.5; CO2 - 3.2-10.7. The methanol is obtained by concentrating it in a copper containing catalyst at high temperature and pressure in two stages. The gas mixture from the reformer is divided into two streams in volume ratios of 100 : (1-50), one of which is in direct contact with the catalyst in the flow reactor at the first stage, at temperature of 200-285°C, pressure of 5-15 MPa and volume rate of 800-2000 h-1. The other stream is mixed with a cycled gas in volume ratio of 10 : (10-100) and with volume rate of 2500-10000 h-1. This stream is then channelled to the second stage, with separation of methanol and water on each stage in corresponding devices.

EFFECT: increased production of methanol and increased efficiency of the process.

1 tbl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing Cu/Zn/Al catalysts, to a catalyst produced using this method, as well as to its use in methanol synthesis, methanol reforming and for low-temperature conversion of carbon monoxide. A method is described for preparing Cu/Zn/Al catalysts, involving preparation of a first aqueous solution which contains at least copper formate and zinc formate, preparation of a second solution which contains a precipitation agent, wherein the first and/or second solution contains an aluminium hydroxide sol/gel mixture, combining both solutions, separating the obtained precipitate from the aqueous phase which forms waste water, washing the precipitate until an alkali content, based on a catalyst which calcined at 600°C, of not less than 500 parts per million is attained, and drying. A catalyst prepared using this method is described, and its use in methanol synthesis, methanol reforming and conversion of carbon monoxide.

EFFECT: simpler technology of producing catalyst and increased activity of the catalyst.

32 cl, 5 tbl, 8 ex

FIELD: chemistry.

SUBSTANCE: invention relates to catalyst, suitable to application in reactions of conversion of carbon oxides, in form of granules, formed by pressing reduced and passivated catalyst powder, and claimed powder contains copper in the interval 10-80 wt %, zinc oxide in the interval 20-90 wt %, aluminium oxide in the interval 5-60 wt % and, optionally, one or several oxide promoter compounds, selected from compounds of Mg, Cr, Mn, V, Ti, Zr, Ta, Mo, W, Si and rare-earth elements, in quantity in the interval 0.01-10 wt %. Said granules have average crush strength in horizontal direction after production ≥6.5 kg, ratio of values of average crush strength in horizontal direction after reduction and after production ≥0.5:1 and area of copper surface over 60 m2/g Cu. Invention also relates to method of claimed catalyst production and to method of conversion of carbon oxides in presence of claimed catalyst.

EFFECT: catalyst has high strength of granules and high activity as a result of increased area of copper surface, which makes it possible to apply reactors of smaller size and increase process productivity.

15 cl, 9 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a methanol synthesis method, which includes the following steps: (i) conducting a reaction, in a reaction loop, of a process gas containing hydrogen, carbon dioxide and carbon monoxide over a catalyst to obtain a product gas, (ii) condensing methanol, water and secondary oxygenates from the product gas, (iii) returning unreacted gases into the reaction loop, where the catalyst includes pellets obtained by pressing from a reclaimed and passivated powdered catalyst, where said powder contains copper in the range of 15-70 wt %, zinc oxide, wherein the weight ratio Cu:Zn with respect to the oxide is in the range of 2:1 to 3.5:1, aluminium oxide in the range of 5-60 wt %, and optionally one or more oxide promoting compounds selected from Mg, Cr, Mn, V, Ti, Zr, Ta, Mo, W, Si and rare-earth elements, in the range of 0.01-10 wt %, wherein the catalyst is obtained by carrying out steps which include: (i) preparing, in an aqueous medium, a composition containing a homogeneous mixture of separate particles of copper, zinc, aluminium and optionally one or more promoting compounds of metals selected from Mg, Cr, Mn, V, Ti, Zr, Ta, Mo, W, Si and rare-earth elements, (ii) separating and drying the composition to form a catalyst precursor, (iii) exposing the dried catalyst precursor composition to reducing conditions so that copper compounds contained therein are reduced to copper, (iv) passivating the surface of the reduced copper, and (v) forming a reduced and passivated composition, where, before reducing the copper compounds, the homogeneous mixture is treated at the drying step at temperature in the range of 180-240°C.

EFFECT: when carrying out the disclosed method, total content of secondary oxygenates in the condensate is not more than 500 ppm.

12 cl, 7 tbl, 5 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a new method for preparing methanol and other aliphatic alcohols by gas-phase interaction of hydrocarbon gases with water vapor under effect of ultraviolet radiation. Methanol and other aliphatic alcohols are prepared by direct hydroxylation of hydrocarbon gas or mixture of hydrocarbon gases with water vapor. For this aim hydrocarbon gas and vapor or mixture of gases and vapor are fed into reactor wherein the reaction mass is subjected for effect of ultraviolet radiation in wavelength range 240-450 nm at temperature lower vapor formation point. The end product is isolated from vapor-gaseous mixture by condensation and unreacted gas or mixture of gases removed from the reaction zone is purified from the end product by bubbling through water layer and recovered into reactor by adding the parent gaseous component in the amount equal to consumed one. The process is carried out for a single stage and can be realized under atmosphere pressure. Invention can be used in chemical, petroleum chemical, petroleum processing and petroleum and gas extracting industry.

EFFECT: improved preparing method.

2 cl, 1 tbl, 8 ex

FIELD: method for production of alcohol-containing solvents based on waste from ethanol production from food-grade raw materials.

SUBSTANCE: claimed method includes reprocessing of etheraldehyde fraction of concentrate containing ethanol main admixtures from starch- and/or sugar-containing raw materials. Process is carried out in rectifier at vapor phase temperature in still of 60-90°C. Nitrosolvent is obtained by mixture sampling at 60-70°C. Degreasing solvent is obtained by mixture sampling at starting temperature in column top of 73°C or more when ethers are detected in distillate. Claimed nitrosolvent (degreasing solvent) contain (mass %): acetate-type ethers 10-30 (0.8-2.9); aliphatic alcohols 51-74 (87-89); acetaldehyde 5-9 (0.2-1.5), and water 8-10 (8-10).

EFFECT: simplified and economy method for reprocessing of waste from ethanol production; enhanced assortment of alcohol-containing solvents.

3 cl, 1 dwg, 3 ex, 3 tbl

FIELD: organic chemistry, fuel production.

SUBSTANCE: claimed method includes feeding of heated hydrocarbon-containing and oxygen-containing gas in reaction unit, vapor phase oxidation of hydrocarbon-containing gas at 250-450°C and pressure of 2.0-10 MPa under near isothermal conditions; cooling of reaction mixture in heat exchangers, separation of gas and liquid phases of reaction mixture. separation of obtained methanol solution of formaldehyde, C2-C4-alcohols and methanol, methanol and gas phase after separation into reactors; catalytic methanol conversion on zeolite catalyst at 350-450°C and pressure of 3-8 MPa; cooling of produced reaction mixture in heat exchangers; separation of gas and liquid phases of reaction mixture; separation of aqueous fraction and synthetic diesel fuel liquid fractions, including fraction of liquid hydrocarbons, corresponding to motor gasoline having octane number of at least 92.

EFFECT: products of high quality; simplified technology; decreased energy consumption.

5 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: present invention pertains to the method of producing aliphatic alcohols. The method involves feeding the first hydrocarbon stream, obtained using the Fischer-Tropsch method, containing olefins and paraffins. The Fischer-Tropsch stream contains 5-80% olefins, with 10-17 average number of carbon atoms. This hydrocarbon stream is fed into the hydrogenation-isomerisation installation, where there is dehydrogenation of at least part of paraffins in the Fischer-Tropsch hydrocarbon stream to olefins. The installation is also made such that, there is isomerisation of at least part of linear olefins to branched olefins, in the presence of a dehydrogenation-isomerisation catalyst, containing zeolite in hydrogen form, with a ferrierite isotope structure. Duration of stay is such that, conversion of paraffins to olefins is lower than 40%, and at least part of unreacted components of the hydrocarbon stream, obtained using the Fischer-Tropsch method and at least, part of products of the dehydration and isomerisation reaction form a second hydrocarbon stream. This second hydrocarbon stream contains olefins and paraffins. At least some of the olefins in the second hydrocarbon stream are branched. The method also involves feeding at least part of the second hydrocarbon stream into a hydroformylation installation. The hydroformylation installation is made such that, at least part of the olefins in the second hydrocarbon stream can be undergo hydroformylation, obtaining aliphatic alcohols with average number of carbon atoms from 11 to 18, and at least part of the obtained aliphatic alcohols contain branched alkyl groups.

EFFECT: invention can be used for producing surface active substances, detergents and sulphates.

9 cl, 7 tbl, 6 dwg, 6 ex

FIELD: chemistry.

SUBSTANCE: method includes introduction of hydrocarbon Fisher-Tropsch flow, containing olefins and paraffins, said hydrocarbon Fisher-Tropsch flow containing from 5 to 80% of olefins, which have average number of carbon atoms from 10 to 17, and paraffins, into installation of hydration, where hydration installation is made in such way as to hydrate at least part of olefins in hydrocarbon Fisher-Tropsch flow to paraffins, and where at least part of components of hydrocarbon Fisher-Tropsch flow, which did not react, and at least part of hydrated olefins form second hydrocarbon flow; introduction of second hydrocarbon flow into installation of dehydration-isomerisation, where installation of dehydration-isomerisation is made in such way as to hydrate at least part of paraffins in second hydrocarbon flow to olefins, and where installation of dehydration-isomerisation is also made in such way as to isomerize at least part of linear olefins to branched olefins in presence of dehydration-isomerization catalyst, which contains hydrogen form of zeolite, having isotopic lattice structure of ferrierite, and where period duration is such that transformation of paraffins into olefins is lower than 40% mol, and where at least part of second hydrocarbon flow components that did not react, and at least part of products of dehydration and isomerisation reactions form third hydrocarbon flow, and third hydrocarbon flow contains olefins and paraffins, and where at least part of olefins in third hydrocarbon flow represent branched olefins; and introduction of at least part of third hydrocarbon flow into installation of hydroformilation, where installation of hydroformilation is made in such way as to hydroformilate at least part of olefins in third hydrocarbon flow obtaining aliphatic alcohols with average number of carbon atoms from 11 to 18, and where at least part of obtained aliphatic alcohols contain branched alkyl group.

EFFECT: reduction of expenditure.

18 cl, 7 tbl, 5 dwg, 6 ex

FIELD: chemistry.

SUBSTANCE: proposed method of producing branched olefins involves dehydrogenation of an isoparaffin composition, containing 0.5% or less quaternary aliphatic carbon atoms, on a suitable catalyst. The above mentioned isoparaffin composition contains paraffins with 7 to 35 carbon atoms. These paraffins, or at least part of their molecules, are branched. The average number of branches per paraffin molecule ranges from 0.7 to 2.5, and the branches include methyl and, optionally, ethyl branches. The above mentioned isoparaffin composition is obtained through hydroisomerisation of paraffin, and the above mentioned branched olefins contain 0.5% quaternary carbon atoms or less. The paraffins are produced using Fischer-Tropsch method. The invention also relates to the method of producing a surface active substance from olefins, obtained using the method described above.

EFFECT: improvement of operational characteristics.

5 cl, 4 tbl, 11 ex

FIELD: chemistry.

SUBSTANCE: method includes introduction of first hydrocarbon flow, including olefins and paraffins, which have number of carbon atoms from 4 to 30, into installation of isomerisation, where installation of isomerisation is intended for isomerisation of at least part of linear olefins in first hydrocarbon flow into branched olefins, and where at least part of components of first hydrocarbon flow, that have not reacted, and at least part of obtained branched olefins form second hydrocarbon flow; introduction of at least part of second hydrocarbon flow into installation of hydroformylation, where installation of hydroformylation is intended for hyroformylation of at least part of olefins in second hydrocarbon flow with formation of aliphatic alcohols and where at least part of obtained aliphatic alcohols include branched alkyl group and where at least part of components of second hydrocarbon flow that have not reacted, and at least part of obtained aliphatic alcohols form flow of hydroformilation reaction; separation of at least part of hydroformylation reaction flow in order to obtain flow of product, containing aliphatic alcohols, and flow of paraffins and olefins that have not reacted, and introduction of at lest part of flow of paraffins and olefins that have not reacted into installation of dehydration, where installation of dehydration is intended for dehydration of at least part of paraffins in flow of paraffins and olefins that have not reacted for obtaining olefins and where at least part of obtained olefins leave installation of dehydration forming olefin hydrocarbon flow and introduction of at least part of olefin hydrocarbon flow into installation of isomerisation.

EFFECT: obtained aliphatic alcohols can be used for obtaining surface-active substances, sulphates.

21 cl, 6 tbl, 3 dwg, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a gas-phase method of catalytic conversion of lower alkanes. A method is described for catalytic conversion of lower alkane, containing up to 5 carbon atoms, into at least one product which is chosen from a group consisting of alcohols, aldehydes and their mixture, involving bringing said lower alkane into contact with an oxidising agent in the presence of a catalyst, containing a platinum complex which is deposited on a carrier, with the following structure: in which: L is a ligand, which is chosen from amino-ligands, hydroxyl ligands and imidazolyl ligands; A is a ligand which is chosen from hydroxyl ligands, chloro-ligands and amino-ligands; M is a metal cation in the catalyst carrier, which is chosen from cations of aluminium, silicon, zirconium, titanium and molybdenum; and n is an integer, which is chosen from 4, 2 and 1, Pt in the catalyst is a cation in a valent state which is chosen from valent states (IV), (II) and (I), which correspond to numerical values of n, where the said platinum cation forms the central core of the platinum complex, ligands L and ligands A surround the central core and ligands L chemically bond the complex to the surface of the carrier, under which metal cations M are localised.

EFFECT: high conversion and selectivity of formation of methanol in direct oxidation of methane or natural gas with air or molecular oxygen in the presence of catalyst promoters.

15 cl; 4 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: alcohol-containing mixture is mixed with acetic or propionic aldehyde in weight ratio 100:(10-45). The obtained mixture is held in the presence of an acid catalyst until stratification and the organic layer is separated from the aqueous layer. The organic layer undergoes deep dehydration by heating to boiling point with reclamation of aldehyde via fractionation to obtain anhydrous alcohol or a mixture of alcohols in the still residue. The acid catalyst used is preferably an ion-exchange resin in hydrogen form or a synthetic zeolite.

EFFECT: method is universal since it has high process flexibility with respect to raw material, and provides considerable efficiency when dehydrating an alcohol-containing mixture containing alcohols with three to five carbon atoms with very low power consumption.

5 cl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of copolymerising olefins, according to which a) a first starting olefin material is prepared, mainly consisting of Cn-olefins, and a second starting olefin material, mainly consisting of Cm-olefins, where n and m independently denote different integers from 2 to 12, and where the second starting olefin material is characterised by degree of branching of olefins defined in form of an ISO index ranging from 0 to 18, and is obtained via dimerisation of raffinate II, mainly consisting of isomeric n-butenes and n-butane, in the presence of a nickel-containing oligomerisation catalyst, and b) the first and second starting olefin materials react on a heterogeneous olefin oligomerisation catalyst based on sheet and/or framework silicates. The invention also relates to codimers obtained using said method, a method of producing alcohols according to which said olefin codimers undergo hydroformylation followed by hydrogenation of mixtures of alcohols obtained using said method.

EFFECT: high efficiency of the method.

18 cl, 2 tbl, 1 ex

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