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Method of natural and associated gas processing Invention refers to oil and gas industry, namely to utilisation and processing methods for associated and natural gas with high methane homologue content to obtain oil products. Processing method for natural and associated gas with high content of heavy methane homologues by selective oxidation of hydrocarbon gas and further carbonylation of products obtained involves mixing of hydrocarbon gas with oxygen or oxygen-containing gas at molar ratio of heavy carbon components to oxygen 5÷0.2:1, and selective oxidation of heavy components at air or near-air pressure and temperature of 500-800°C, and products obtained are processed in the presence of carbonylation catalysts containing compounds of VIII group metals and phosphine (arsinic) ligands, at 80-120°C and air pressure to obtain liquid products such as aldehydes, carbonic acids, diethyl ketone, polyketones, and dry fuel gas saturated with methane and purified from heavy components. |
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Invention relates to method of obtaining at least one product of carbonylation, selected from the group, including acetic acid and methylacetate, which includes carbonylation of at least one carbonylatable reagent, selected from the group, including methanol and its reaction-able derivatives, with carbon monoxide in presence of catalyst, where said catalyst is represented by mordenite, possessing molar ration silicon dioxide: X2O3 (where X stands for Al and/or Ga), constituting not less than 12:1; and additionally, where said mordenite is processed according to single-staged technique with basic water solution, containing at least one of the following: aluminate-ions and gallate-ions, or is successively processed with separate water solutions (a) of base and (b) aluminate- and/or of gallate-ions or their source. |
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Associated and natural gas conversion process Invention is referred to conversion process of associated and natural gases with high content of heavy methane homologs by direct partial oxidation of hydrocarbon gas and further carbonylation of the received products. At that hydrocarbons gas is mixed up with oxygen or oxygen-containing gas with mole ratio of hydrocarbon in heavy components: oxygen of 10-1:1 and selective oxidation of heavy components is made at temperature of 350-420°C and pressure of 10-40 bar and the received products are subjected to processing in presence of carbonylation catalysts with production of liquid products of carboxylic acids and their ethers and dry fuel gas purified from heavy components and enriched with methane. |
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Method of producing (4e)-tridec-4-en-1-ylacetate Invention relates to organic chemistry and particularly to a method of producing (4E)-tridec-4-en-1-ylacetate. (4E)-tridec-4-en-1-ylacetate is a sex pheromone for tomato moth (Keiferia lycopersicella), which is a dangerous pest for solanaceae. Results of the invention can be useful in chemistry and agriculture. The method of producing (4E)-tridec-4-en-1-ylacetate includes alkylating malonic ester with (E)-1,3-dichloropropene to obtain diethyl[(2E)-3-chloroprop-2-en-1-yl]propanedioate, decarbalkoxylating diethyl[(2E)-3-chloroprop-2-en-1-yl]propanedioate to obtain ethyl(4E)-5-chloropent-4-enoate, Fe-catalysed cross-coupling of the ethyl(4E)-5-chloropent-4-enoate with octylmagnesium bromide to obtain ethyl(4E)-tridec-4-enoate, reducing the ethyl(4E)-tridec-4-enoate to obtain (4E)-tridec-4-en-1-ol, acetylation of the (4E)-tridec-4-en-1-ol to obtain (4E)-tridec-4-en-1-ylacetate. According to the invention, Fe-catalysed cross-coupling of ethyl(4E)-5-chloropent-4-enoate with octylmagnesium bromide to obtain ethyl(4E)-tridec-4-enoate is carried out in the presence of a Fe(acac)2Cl catalyst in a mixture of tetrahydrofuran and N-methylpyrrolidone, wit the following molar ratio of reactants [(ethyl(4E)-5-chloropent-4-enoate]:[octylmagnesium bromide]:[Fe(acac)2Cl]:[tetrahydrofuran ]:[N-methylpyrrolidone]=1:1.15:0.01:12:7 for 30 min at 0-5°C. |
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Method of obtaining esters of amyl alcohols Invention relates to methods of obtaining esters of amyl alcohols and simplest carboxylic acids C1-C4. Alcohol-containing wastes of caprolactam production are used as raw material. Method includes etherification of alcohol-containing wastes of caprolactam wastes with simplest carboxylic acids C1-C4 in presence of acidic catalyst. Process of etherification is carried out with continuous azeotropic distillation of water with reaction mixture components, as catalyst, sulfuric or orthophosphoric acid is used, catalyst is loaded in amount 0.1-2.5% of the total weight of initial substances, reaction mixture is cooled to 20-30°C and neutralised with water-alkaline solution with mixing to water layer pH 7-8, water phase is separated, organic phase is washed one-two times with water, final purification of esters is carried out by fractional distillation of organic phase. Obtained products are suitable for application as solvents for paints and varnishes, raw material for organic synthesis, as component of complex fuel additives. |
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Invention relates to improved method of obtaining at least one of acetic acid and methylacetate by carbonylation of capable of carbonylation agent, selected from the group including methanol, methylacetate and dimethyl ether, with carbon monoxide in presence of catalyst, with catalyst being represented by desiliconised mordenite. |
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Invention relates to an improved method of obtaining at least one product of carbonylation, selected from a group, including acetic acid and methylacetate, which includes carbonylation of at least one carbonylatable reagent, selected from a group, which includes methanol and its reactionable derivatives, with carbon monoxide in the presence of a catalyst, where the said catalyst is represented by mordenite, processed with a water solution of ammonium hydroxide and possessing a molar ratio silicon dioxide:aluminium oxide, constituting not less than 10:1. The invention also relates to an application of the catalyst, represented by mordenite, possessing a ratio silicon dioxide:aluminium oxide, constituting not less than 10:1, processed with a water solution of ammonium hydroxide, with provision of an improved catalytic activity in the said method. |
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Method for carbonylation with using bound argentous and/or cuprous modernite catalysts Invention refers to an improved method for carbonylation of at least one carbonylating reagent specified in a group consisting of dimethyl ester and methanol, carbon monoxide in the presence of a catalyst to prepare at least one carbonylation product specified in a group consisting of methyl acetate and acetic acid, and the above catalyst is prepared by combining modernite comprising one of: silver and copper with an inorganic oxide binding agent. |
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Carbonylation method for producing methyl acetate Invention relates to an improved method of reducing formation of byproducts when producing methyl acetate, which involves carbonylation of dimethyl ether with carbon monoxide in one or more carbonylation reaction zones in the presence of a mordenite catalyst to obtain a methyl acetate product, characterised by that at least one of methyl acetate and acetic acid is fed into at least one of said reaction zones. |
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Method of carbonylation with application of mordenite catalyst, applied on inorganic oxides Invention relates to improved method of increasing catalytic activity and/or selectivity in the process of obtaining product of methylacetate and/or acetic acid, which includes contact of carbonylated reagent, selected from dimethyl ether and methanol, with carbon monoxide in presence of catalyst, representing H-mordenite, bound with mesoporous binding agent, selected from silicon oxides, aluminium oxides, silicon oxides-aluminium oxides, magnesium silicates and magnesium-alumosilicates. |
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Method of obtaining acylated alkoxylates of secondary alcohols and alkoxylates of secondary alcohols Invention relates to method of obtaining acylated alkoxylate of secondary alcohol of formula R1-C(O)-(OA)n-OR2(I), in which R1 is linear or branched alkyl group, including from 1 to 30 carbon atoms, optionally substituted cycloalkyl group, which includes from 5 to 30 carbon atoms, or optionally substituted aryl group, including from 6 to 30 carbon atoms, OA stands for one or several oxyalkylene fragments, which can be similar or different, n stands for integer number in the range from 0 to 70, and R2 is linear or branched alkyl group, including from 4 to 32 carbon atoms, optionally substituted cycloalkyl group, including from 5 to 32 carbon atoms, or optionally substituted bicycloalkyl group, including from 7 to 32 carbon atoms, where claimed method includes: (i) interaction of one or several olefins with internal double bond with one or several carboxylic acids in presence of catalytic composition with obtaining one or several ethers of carboxylic acid; (ii) interaction of one or several ethers of carboxylic acid, obtained at stage (i), with one or several alkylene oxide reagents in presence of catalytically efficient quantity of catalytic composition, which includes: (a) one or several salts of alkali earth metals and carboxylic acids and/or hydroxycarboxylic acids, which include 1-18 carbon atoms, and/or hydrates of the former; (b) oxygen-containing acid, selected from sulfuric acid and orthophosphoric acid; (c) alcohol, containing from 2 to 39 carbon atoms; and/or products of (a), (b) and/or (c) interactions with obtaining one or several acylated alkoxylates of secondary alcohols. |
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Method for carbonylation of dimethyl ether Invention relates to a method of increasing efficiency and catalyst stability when producing methyl acetate, involving carbonylation of dimethyl ether based material with carbon monoxide in virtually anhydrous conditions in the presence of a zeolite catalyst which is efficient in said carbonylation, wherein the reaction is carried out at temperature ranging from 275°C to 350°C, and in the presence of hydrogen. |
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Method for carbonylation of dimethyl ether Invention relates to a method of increasing efficiency and selectivity when producing methyl acetate, involving carbonylation of material based on dimethyl ether with carbon monoxide in virtually anhydrous conditions in the presence of a zeolite catalyst which is efficient in said carbonylation, wherein the reaction is carried out at temperature ranging from higher than 250 to 350°C, and at pressure ranging from higher than 10 to 100 bar (isobar). |
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Method of processing fusel oil Invention relates to chemical engineering and specifically to processing fusel oil, which is a large-tonnage waste in the alcohol industry. Fusel oil from production of ethyl alcohol is processed by esterification with glacial acetic acid in the presence of a sulphuric acid catalyst, and neutralisation, wherein esterification is carried out while boiling the reaction mixture and continuously separating water using a separating flask. The obtained product is separated from the catalyst under a vacuum at temperature not higher than 110°C. The obtained product and the catalyst are separately neutralised and the obtained product is additionally dried. |
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Method for carbonylation of dimethyl ether Invention relates to an improved method of increasing catalytic activity when producing methyl acetate, involving carbonylation of dimethyl ether-based material with carbon monoxide in the presence of hydrogen in virtually anhydrous conditions at temperature ranging from more than 250°C to 350°C, in the presence of a zeolite catalyst which is efficient in said carbonylation, wherein concentration of dimethyl ether is at least 1 mol % with respect to the total amount of material. |
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Method for carbonylation of aliphatic alcohols and/or reactive derivatives thereof Invention relates to an improved method of producing C1-C3 aliphatic carboxylic acid and/or the corresponding ester, by carbonylating the corresponding C1-C3 aliphatic alcohol and/or an ester or ether derivative thereof with carbon monoxide material containing hydrogen, in the presence of a catalyst containing a zeolite having at least one 8-member ring channel, said 8-member ring channel being connected with a channel formed by a ring with greater than or equal to 8 members, said 8-member ring having a window size of at least 2.5 Å × at least 3.6 Å and at least one Bronsted acid site and that zeolite has a silicon dioxide: X2O3 molar ratio of not less than 5, where X is selected from aluminium, boron, iron, gallium and mixtures thereof with the condition that the zeolite is not mordenite or ferrierite. The catalysts demonstrate considerable carbonylation activity compared to other zeolite catalysts. |
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Method for carbonylation of dimethyl ether Invention relates to catalysts for producing methyl acetate and a method of producing methyl acetate. Described is a method of producing methyl acetate, involving carbonylation of dimethyl ether-based material with carbon monoxide with almost no water in the presence of a mordenite catalyst in which at least one of the following elements is introduced using an ion exchange or some other method: silver and copper, and in which platinum is also introduced into the mordenite via an ion exchange or some other method in amount of 0.05-10 mol % with respect to aluminium. Described is a catalyst for producing methyl acetate via carbonylation of dimethyl ether-based material with carbon monoxide in virtually anhydrous conditions, which is prepared via simultaneous ion exchange or saturation of the ammonium or hydrogen form of mordenite with platinum and at least one of the metals - silver and copper, drying and/or calcination of the mordenite which has been saturated or subjected to ion exchange, wherein the catalyst contains platinum in amount of 0.05-10 mol % with respect to aluminium and a catalyst prepared via ion exchange or saturation of the ammonium or hydrogen form of mordenite with at least one of the metals - silver and copper, drying and/or calcination of the mordenite which has been saturated or subjected to ion exchange to obtain copper- and/or silver-containing mordenite, followed by ion exchange or saturation of the copper- and/or silver-containing mordenite with platinum, wherein the catalyst contains platinum in amount of 0.05-10 mol % with respect to aluminium. |
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Method of producing ethyl acetate Catalyst further contains chromium oxide in amount of 5.0-20.0 wt % of the total amount of catalyst. Ethanol with water content of up to 15 wt % is used in the process. Use of the method enables to increase ethanol conversion to 58%, ethyl acetate selectivity to 95%, and use ethanol with water concentration of up to 15 wt %. |
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Method of reducing concentration of aldehyde in target stream Invention relates to an improved method of reducing concentration of aldehyde in the crude stream of a carbonylation process, involving feeding a crude stream containing a carbonylatable agent selected from a group consisting of methanol, methyl acetate, methyl formate and dimethyl ether or mixture thereof, having primary concentration of aldehydes; and reaction thereof in gaseous phase with a deposited catalyst which contains at least one metal from group 8 to 11, in conditions which facilitate reduction of primary concentration of aldehydes to secondary concentration of aldehydes. |
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Method of producing carbonylation products Invention relates to an improved carbonylation method intended for producing a carbonylation product through reaction of carbon monoxide with raw material which contains alcohol and/or reactive derivative thereof, in vapour phase using a heterogeneous catalyst in form heteropoly acid which undergoes ion exchange with one or more metals selected from a group comprising rhodium, iridium, copper and palladium, and a group IA metal selected from lithium, sodium, potassium and rubidium, or in which these metals are included, where the heteropoly acid has formula H3M12XO40, where M denotes tungsten, molybdenum, chromium, vanadium, tantalum or niobium and X denotes phosphorus or silicon. |
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Method of producing esters from caprolactam production wastes Invention relates to synthesis of esters from the alcohol fraction of caprolactam. The method of producing esters from caprolactam production wastes is realised via esterification of organic acid and alcohol in autocatalytic heat release conditions which support the esterification reaction at temperature 40-130°C using a catalyst in form of cation-exchange resin which is pre-treated with sulphuric acid in amount of 0.4-2 wt % of the weight of the loaded material with cooling down of the reaction mixture before separating the two phases. |
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Catalyst, method of its preparation and method of producing methyl acetate Method relates to production of acetic acid ether (methyl acetate) via carbonylation of dimethyl ether in gas phase in presence of catalyst and may be used in chemical industry. Invention covers catalyst for carbonylation of dimethyl ether that comprises acid cesium salt of phosphor-tungsten heteropoly acid CsxHyPW12O40, where 1.3≤x≤2.2, y=3-x with platinum additive in amount of 0.25-1.0 wt %. Catalyst in prepared on adding cesium soluble salt to mix of solutions of phosphor-tungsten heteropoly acid and platinum-hydrochloric acid, both taken in required ratio, evaporating, drying, tabletting and grinding to required size. Invention covers also production of methyl acetate in presence of above described catalyst. |
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Novel fragrant compounds, sythesis method and application thereof Invention relates to novel compounds of general formula (I) |
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Method for carbonylation of alkyl ethers Invention relates to a method of producing lower alkyl ether of lower aliphatic alcohol having formula R1-COO-R2, involving reaction of a pre-dried lower alkyl ether having formula R1-O-R2, in which R1 and R2 independently denote C1-C6alkyl groups, provided that the total number of carbon atoms in groups R1 and R2 ranges from 2 to 12, or R1 and R2 together form a C2-C6 alkenyl group, with material which contains carbon monoxide, in the presence of a catalyst which contains mordenite and/or ferrierites in anhydrous conditions. The invention also relates to a method of producing carboxylic acids through hydrolysis of esters obtained using the method given above. |
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Invention relates to an improved method for synthesis of an ester through reaction of 1-olefin with a monobasic carboxylic acid and water in vapour phase in the presence of a heteropolyacid catalyst on silica gel, in which the silica gel support is in from of granules treated with water vapour at temperature between 100 and 300°C for a period of time between 0.1 to 200 hours, before or simultaneously with application of the heteropolyacid onto the support. The invention also relates to a heteropolyacid catalyst deposited on silica gel and to a method of preparing the catalyst, where the support is obtained by treating silica gel granules with water vapour at temperature between 100 and 300°C for a period of time between 0.1 and 200 hours, before or simultaneously with application of the heteropolyacid onto the support. |
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Method of producing carboxylic acids and derivatives thereof Method of producing acetic acid and its ester or anhydride involves bringing methanol and/or its reactive derivative selected from methyl acetate and dimethyl ether into contact with carbon monoxide in the presence of a catalyst at temperature ranging from 250 to 600°C and pressure ranging from 10 to 200 bars, and where content of iodide in the methanol and/or its reactive derivative, carbon monoxide and catalyst is less than 500 parts/million, where the catalyst essentially consists of mordenite which contains skeleton elements in form of silicon, aluminium and one or more of other elements selected from gallium and boron, and in which copper, nickel, iridium, rhodium or cobalt is added through ion exchange or some other method. |
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Method of producing carbonylation products Described is a carbonylation method for producing a carbonylation product by bringing carbon monoxide into contact with initial material containing alcohol and/or its reactive derivative, in vapour phase using a heterogeneous heteropolyacid catalyst containing one or more metal cations selected from Cu, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd and Pt. The initial material contains 0.5-20 wt % water and water in the initial material is fresh and/or recycled. |
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Carbonylation method using catalysts with metal polydentate ligands Method includes carbonylation of the alcohol and/or of its reactive derivative with carbon monooxide in liquid reaction mixture carried out in carbonylation reactor. The said liquid reaction mixture contains the said alcohol and/or its reactive derivative, carbonylation catalyst, alkyl halide cocatalyst whereat the said catalyst includes at least one metal selected from rhodium or iridium coordinated with polydentate ligand whereat the said polydentate ligand has the bite angle at least 145° or forms the "hard" Rh or Ir metal-ligand complex; the said polydentate ligand includes at least two coordination groups; at least two of them independently contain P, N, As or Sb as coordination atoms. The hydrogen/carbon monooxide mole ratio is supported in the range at least 1:100 and/or carbon monooxide directed to carbonylation reactor contains at least 1 mole % of hydrogen; catalyst flexibility range is less 40°. The method is tolerable to hydrogen presence i.e. liquid side-products are formed in small amounts or are not formed at all. |
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Method of carbonylation using catalysts with metal-tridentate ligands Invention concerns improved method of obtaining carboxylic acid and/or complex alcohol ether and carboxylic acid, involving carbonylation of C1-C8 aliphatic alcohol and/or its reactive derivative by carbon monoxide in liquid reaction mix in carbonylation reactor. Liquid reaction mix includes indicated alcohol and/or its reactive derivative, carbonylation catalyst, alkylhalide co-catalyst and optionally water in limited concentration, the catalyst including cobalt, rhodium or iridium coordinated with tridentate ligand, or their mix. Also invention concerns application of carbolylation catalyst including cobalt, rhodium or iridium coordinated with tridentate ligand, or their mix, in carbonylation method of obtaining carboxylic acid and/or complex alcohol ether and carboxylic acid. |
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Method of obtaining alkylacetate Complex esters of carboxylic acids found application in paint-vanish and other branches of industry. Method of obtaining alkylacetate from acetic acid and alkene(s) C3-C5 or its(their) mixtures with saturated hydrocarbons is realised by contacting at higher temperature with solid strong-acid catalyst in one or several consecutive reaction zones with further separation of reaction mixture and isolation of concentrated alkylacetate by means of rectification, in which by regulation of reagent supply, temperature and cooling of flow(s) in each point of reaction zone(s) and on its (their) output, mole ratio acetic acid: alkene(s) not less than 1.2:1 and temperature not more than 120°C are supported, limitation of temperature is ensured by distributed supply of cold alkene-containing flow with temperature from minus 30 to plus 60°C into intermediate points of reaction zone(s) and/or between reaction zones possibly in combination with method(s) of cooling of reaction flows, selected from group, including: cooling reaction zone(s), cooling flows between reaction zones, cooling and recirculation of part of outgoing reaction mixture flow to input as minimum to first reaction zone. |
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Alkenyl carboxylate or alkyl carboxylate production process Invention relates to a process for production of C2-C4-alkane into alkene and carboxylic acid and immediately using them in ester synthesis stage. According to invention, to produce alkyl carboxylate, in particular ethyl acetate, or alkenyl carboxylate, in particular vinyl acetate, stage wherein alkane is oxidized to corresponding alkene and carboxylic acid is combined with alkenyl carboxylate or alkyl carboxylate production stage. Process comprises contacting of alkane- and alkene-containing gas raw material with molecular oxygen and catalyst in the first oxidation reaction zone, catalyst being efficient in oxidation of alkane into corresponding alkene and carboxylic acid. In the second reaction zone, part of streams isolated in separation stage and enriched with alkene and carboxylic acid is brought into contact with at least one catalyst efficient to produce either alkyl carboxylate or alkenyl carboxylate in presence of oxygen-containing gas. For example, first product stream consists of ethylene and acetic acid with water admixture. In the second reaction zone, stream enriched with alkene and carboxylic acid comes into contact with oxygen, optionally in presence of additional amount of ethylene and/or acetic acid from the first product stream. As a result, second product stream comprising vinyl acetate, water, acetic acid, and optionally small amounts of carbon oxides is obtained. Second product stream is separated into fractions containing vinyl acetate and acetic acid, which are subjected to further purification. In a cycle wherein acetic acid from main fraction is regenerated, the latter is recycled to vinyl acetate stage in the second reaction zone. |
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Novel derivatives of norbornane and norbornene, their using and aromatic products comprising thereof Invention relates to novel compounds of the formula (I) , wherein a dotted line means a bond or it absent and wherein R1 means: -when a dotted line as a bond is absent: -CHCH3OH or -CHCH3OCOR or -CHCH3XCH2CHOHR' or -CHCH3OCHR'CH2OH or ; -when a dotted line is absent: , -CHCH3OH, -CHCH3OCOR, -COCH3, -CHCH3XCH2CHOHR', -CH2CH2XCH2CHOHR', -CHCH3OCHR'CH2OH, -CHCHCOR', -CHCH2CHR'OH, -CH2CHCHR'OCOR, -CHCHCHOHR' or -CHCHCHR'OCOR wherein R means H, Me, Et, Pr, isoPr, But, isoBut, -CH3(CH2)4, -(CH3)2CHCH2, -CH2=CH or -(CH3)2C=CH; R' means H, Me or Et; X means O, N or S atoms. Owing to their odor proposed compounds can be used in perfume industry, cosmetics and care substances and can be used as aromatizing components for preparing atomatized composition or aromatized article. |
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Method for oxidation for preparing alkenes and carboxylic acids Invention relates to the improved method for oxidation of (C2-C4)-alkane and preparing the corresponding alkene and carboxylic acid. Method involves addition of this alkane to contact with molecular oxygen-containing gas in oxidative reaction zone and optionally at least one corresponding alkene and water in the presence of at least two catalysts with different selectivity. Each catalyst is effective in oxidation of alkane to corresponding alkene and carboxylic acid resulting to formation of product comprising alkene, carboxylic acid and water wherein the molar ratio between alkene and carboxylic acid synthesized in the reaction zone is regulated or maintained at the required level by regulation the relative amounts of at least two catalyst in the oxidative reaction zone. Also, invention relates to the combined method for preparing alkyl carboxylate comprising abovementioned stage in preparing alkene and carboxylic acid in the first reaction zone. Then method involves the stage for addition of at least part of each alkene and carboxylic acid prepared in the first reaction zone to the inter-contacting in the second reaction zone the presence of at least one catalyst that is effective in preparing alkyl carboxylate to yield this alkyl carboxylate. Also, invention relates to a method for preparing alkenyl carboxylate comprising the abovementioned stage for preparing alkene and carboxylic acid in the first reaction zone and stage for inter-contacting in the second reaction zone of at least part of each alkene and carboxylic acid synthesized in the first reaction zone and molecular oxygen-containing gas in the presence of at least one catalyst that is effective in preparing alkenyl carboxylate and resulting to preparing this alkenyl carboxylate. |
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Oxidation process resulting in production of alkenes and carboxylic acids Invention relates to improved C2-C4-alkane oxidation process to produce corresponding alkene and carboxylic acid, which process comprises bringing indicated alkane in oxidation reaction zone into contact with molecular oxygen-containing gas and corresponding alkene and optionally with water in presence of at least one catalyst efficient for oxidation of alkane into corresponding alkene and carboxylic acid. Resulting product contains alkene, carboxylic acid, and water, wherein alkene-to-carboxylic acid molar ratio in oxidation reaction zone is controlled or maintained at desired level by way of controlling alkene and optional water concentrations in oxidation reaction zone and also, optionally, controlling one or several from following parameters: pressure, temperature, and residence time in oxidation reaction zone. Invention also relates to integrated process of producing alkyl carboxylate including above-indicated stage of producing alkene and carboxylic acid in first reaction zone and stage of bringing, in second reaction zone, at least part of each of alkene and carboxylic acid obtained in first reaction zone in contact with each other in presence of at least one catalyst effective in production of alkyl carboxylate to produce the same. Invention further relates to production of alkenyl carboxylate including above-indicated stage of producing alkene and carboxylic acid in first reaction zone and stage of bringing, in second reaction zone, at least part of each of alkene and carboxylic acid obtained in first reaction zone plus molecular oxygen-containing gas into contact with each other in presence of at least one catalyst effective in production of alkenyl carboxylate to produce the same. |
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The invention is dealt with the methods of production of synthesis gas, production of methanol and acetic acid on its base. The method of upgrading of the existing installation for production of methanol or methanol/ ammonia provides for simultaneous use of the installation also for production of acetic acid or its derivatives. The existing installation contains a reformer, to which a natural gas or other hydrocarbon and a steam (water), from which a synthesis gas is formed. All the volume of the synthesis gas or its part is processed for separation of carbon dioxide, carbon monoxide and hydrogen. The separated carbon dioxide is fed into an existing circuit of synthesis of methanol for production of methanol or is returned to the inlet of the reformer to increase the share of carbon monoxide in the synthesis gas. The whole volume of the remained synthesis gas and carbon, which has not been fed into the separator of dioxide, may be transformed into methanol in the existing circuit of a synthesis of methanol together with carbon dioxide from the separator and-or carbon dioxide delivered from an external source, and hydrogen from the separator. Then the separated carbon monoxide is subjected to reactions with methanol for production of acetic acid or an intermediate compound of acetic acid according to the routine technology. A part of the acetic acid comes into reaction with oxygen and ethylene with formation of monomer of vinyl acetate. With the help of the new installation for air separation nitrogen is produced for production of additional amount of ammonia by the upgraded initial installation for production of ammonia, where the separated hydrogen interacts with nitrogen with the help of the routine technology. As the finished product contains acetic acid then they in addition install the device for production of a monomer of vinyl acetate using reaction of a part of the acetic acid with ethylene and oxygen. With the purpose of production of the oxygen necessary for production of a monomer of vinyl acetate they additionally install a device for separation of air. At that the amount of nitrogen produced by the device of separation of air corresponds to nitrogen demand for production of additional amount of ammonia. The upgraded installation ensures increased production of additional amount of ammonia as compared with the initial installation for production of methanol. The invention also provides for a method of production of hydrogen and a product chosen from a group consisting of acetic acid, acetic anhydride, methyl formate, methyl acetate and their combinations, from hydrocarbon through methanol and carbon monoxide. For this purpose execute catalytic reforming of hydrocarbon with steam in presence of a relatively small amount of carbon dioxide with formation of the synthesis gas containing hydrogen, carbon monoxide and carbon dioxide, in which synthesis gas is characterized by magnitude of the molar ratio R = ((H2-CO2)/(CO+CO2)) from 2.0 up to 2.9. The reaction mixture contains carbon monoxide, water -up to 20 mass %, a dissolvent and a catalytic system containing at least one halogenated promoter and at least one rhodium compound, iridium compound or their combination. The technical result provides, that reconstruction of operating installations increases their productivity and expands assortment of produced industrial products. |
Another patent 2550841.