The method of obtaining acetic acid and the catalyst for its implementation

 

(57) Abstract:

The inventive ethane and/or ethylene and rast containing molecular oxygen react in the presence of a catalyst at 209-500°€ V the pressure of 1-50 bar. The catalyst contains no 0 île W. V. Nb. Sb, Ca and oxygen by the following gram-atomic ratio of the element a : V : Mb: Sb : Sa equal to a : h : b:: g, where a Mo-Re W and ad, feO, fsQ. but both not equal to zero, e is 0, provided that d + e + f - 1. Ü 0.05 - 1D - OF 0.001 - 1.0. h - 0,05 - 1,0; 2 . 2 and 3 self crystals, 4 PL.

 

Same patents:

FIELD: petrochemical process catalysts.

SUBSTANCE: catalyst constitutes cements formed during heat treatment and depicted by general formula MeO·nAl2O3, where Me is at least one group IIA element and n is number from 1.0 to 6.0, containing modifying component selected from at least one oxide of magnesium, strontium, copper, zinc, indium, chromium, manganese, and strengthening additive: boron and/or phosphorus oxide. The following proportions of components are used, wt %: MeO 10.0-40.0, modifying component 1.0-5.0, boron and/or phosphorus oxide 0.5-5.0, and alumina - the balance. Catalyst is prepared by dry mixing of one group IIA element compounds, aluminum compounds, and strengthening additive followed by mechanochemical treatment on vibromill, molding of catalyst paste, drying, and calcination at 600-1200°C. Modifying additive is incorporated into catalyst by impregnation and succeeding calcination. Method of pyrolysis of hydrocarbon feedstock producing C2-C4-olefins is also described.

EFFECT: increased yield of lower olefins.

3 cl, 2 tbl, 18 ex

FIELD: main organic synthesis.

SUBSTANCE: proposed method is used for production of ketones, for example dimethyl ketone (CH3COCH3), methyl ethyl ketone (CH3COC2H5) by direct catalytic oxidation of respective alkenes, for example propylene, n-butenes, as well as catalysts for realization of this method. Oxidation of alkenes is performed in the presence of metallocomplex catalysts containing organic component where nitrogen oxide (I) is used as oxidant. Used for process is catalyst on base of peroxopolyoxo metallate complexes of terakis (oxo diperoxo metallate)-phosphate (3-) together with quaternary ammonium cationes having formula Q3{PO4[MeO(O2)2]4}, where Me-Mo, W,V; Q3 is quaternary ammonium catione containing alkyl chains C4-C8 or N-hexadecyl pyridinium.

EFFECT: enhanced selectivity of process.

10 cl, 14 ex

FIELD: cleaning waste flue gases of tubular furnaces used in power technological plants of ammonia production process from nitrogen oxides.

SUBSTANCE: proposed method includes mixing flue gases with air and ammonia-containing reductant. Used as ammonia-containing reductant are synthetic gases of ammonia production process of the following composition, mass-%: ammonia, 20-30; methane, 18-24; hydrogen, 25-35; argon, 3.8-4.8; the remainder being nitrogen. Selective catalytic reduction of nitrogen oxides of flue gases is performed in reactor at temperature of 240-450°C with the use of tungsten-vanadium catalyst. Proposed method makes it possible to clean flue gases to 91%.

EFFECT: high degree of cleaning.

2 ex

FIELD: oxidation catalysts.

SUBSTANCE: invention relates to carbon monoxide oxidation catalysts suitable to remove carbon monoxide from emission gases. Catalyst according to invention contains cadmium telluride and indium antimonide at weight ratio 95:5.

EFFECT: increased activity and selectivity of catalyst.

1 tbl

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

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

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

6 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: flow of water solution of dioxybenzole with concentration from 5 to 60 wt % with volume rate, expressed in kg of dioxybenzole/hour/kg of catalyst 0.1 - 10 hours-1, and hydrogen flow are supplied to adiabatic reactor with immobile layer of catalyst. Reaction of hydrodeoxygenation in vapour phase working in continuous regime in presence of catalyst is performed. Flow of dioxybenzole water solution and hydrogen flow are supplied in such amount that ratio between total quantity of hydrogen and dioxubenzole moles was within range from 2:1 to 50:1. Reaction is carried out at temperature within range from 250 to 500°C and pressure 0.1-10 MPa. Used catalyst represents catalyst on carrier, containing element of group VIB, or their mixture, or element of group VIII of periodic system, or their mixture and promoter.

EFFECT: invention allows to increase decree of dioxybenzole conversion, selectivity in relation to phenol and process productivity.

21 cl, 27 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: mixed metal oxide catalyst based on antimonite in a catalytic active oxidation state has the empirical formula: MeaSbbXcQdReOf, where Me is at least one element from the group: Fe, Co, Ni, Sn, U, Cr, Cu, Mn, Ti, Th, Ce, Pr, Sm, or Nd; X is at least one element from the group: V, Mo, or W; Q is at least one element from the group: Li, Na, K, Rb, Cs, Be, Mg, Ca, Sr, Ba, Sc, Y, La, Zr, Hf, Nb, Ta, Re, Ru, Os, Rh, Ir, Pd, Pt, Ag, Au, Zn, Cd, Hg, Al, Ga, In, Tl, Ge, Pb, As, or Se; R is at least one element from the group: Bi, B, P, or Te; and the indices a, b, c, d, e and f denote atomic ratios: a has a value from 0.1 to 15; b has a value from 1 to 100; c has a value from 0 to 20; d has a value from 0 to 20; e has a value from 0 to 10 and f is a number, taken to fulfill the valency requirements of the metals answering for the oxidation degree they have in the composition of the catalyst. Method of obtaining such a catalyst includes the following stages. At first they are subjected to aqueous suspension of Sb2O3 with HNO3 and with one or more compounds of Me, and voluntarily with one or more compounds from the groups: X, Q or R, for obtaining the first mixture (a). The first mixture is then heated and dried to form a solid product (b). After this the solid product is calcinated forming the catalyst. The particular metal oxide catalyst based on antimonite in the catalytic active oxidation state as per the invention has the empirical formula: Ua'FeaSbbMocBieOf, where the indices a, a', b, c, e and f denote atomic ratios: a has a value from 0.1 to 5; a' has a value from 0.1 to 5; b has a value from 1 to 10; c has a value from 0.001 to 0.2; e has a value from 0.001 to 0.2; and f is a number, taken to fulfill the valency requirements of Sb, U, Fe, Bi, and Mo, answering for the oxidation degree they have in the composition of the catalyst. Method of obtaining such a catalyst includes the following stages. At first they are subjected to aqueous suspension of Sb2O3 with HNO3, oxides or nitrates of bismuth and oxides or nitrates of uranium to form the first mixture (a). The first mixture is then heated under temperature and in a period of time, enough for the induction of the process for the formation of the antimonic oxide crystals and formation of the second mixture (b). An aqueous solution of a ferric compound iss then added to the second mixture for the formation of a third mixture (c). The pH of the third mixture is regulated in the range of 7 - 8.5, a precipitate of a hydrated mixture of oxides in the aqueous phase is formed (d). The precipitate is separated from the aqueous phase (e). An aqueous suspension of precipitate components of hydrated mixed oxides is obtained (f). Molybdate is added to the suspension component of hydrated mixed oxides (g). A suspension of hydrated mixed oxides of Molybdate component in the form of dy particles is formed (h). Later the calcination of the dry particles with the formation of the catalyst is carried out (i).

EFFECT: increase in the activity and selectivity of the catalyst.

30 cl, 2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: catalytic composition contains compounds of formula: Mo1VaSbbNbcMdOx, in which Mo represents molybdenum, V stands for vanadium, Sb stands for antimony, Nb stands for niobium, M represents gallium, a constitutes from 0.01 to 1, b constitutes from 0.01 to 1, c constitutes from 0.01 to 1, d constitutes from 0.01 to 1, and x is determined by requirements of valency of other present elements.

EFFECT: increase of alkane conversion degree, increase of selectivity of catalytic composition in one stage process of alkane transformation into unsaturated carbonic acid.

9 cl, 1 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to vanadium-titanium oxide catalysts, used in production of methonic acid through gas-phase oxidation of formaldehyde with oxygen and methods of obtaining methanoic acid using the said catalysts. Description is given of a catalyst containing 7.0-50.0 wt % vanadium oxide and modifying compounds: one or more oxides of group IV and V metals with total weight content of oxides of modifying metals between 0.1 and 10.0 wt %, and mainly between 0.1 and 3 wt %. Described also is a method of obtaining methanoic acid through oxidation of formaldehyde using oxygen in one or several serial pipe reactors in the presence of the above described catalyst.

EFFECT: increased catalyst activity and increased output of methanoic acid.

8 cl, 18 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to vanadium-titanium oxide catalysts, used in production of methonoic acid through gas-phase oxidation of formaldehyde with oxygen and methods of obtaining methanoic acid using these catalysts. Described is a catalyst based on vanadium and titanium oxides, containing 7.0-50.0 wt % vanadium oxide and in form of granules with one or several through-holes and equivalent diametre of the granules defined by the ratio 6V/S, where V is the volume of the catalyst granule and S is the outer surface area of the catalyst granule. The equivalent diametre lies between 2.0 and 3.9 mm and mainly between 2.4 and 3.5 mm. Described also is a method of obtaining methanoic acid through oxidation of formaldehyde with oxygen in one or several serial pipe reactors in the presence of the above described catalyst.

EFFECT: increased catalyst activity and increased output of methanoic acid.

7 cl, 10 ex, 1 tbl

FIELD: petrochemical processes and catalysts.

SUBSTANCE: invention relates to supported olefin metathesis catalyst and to a olefin metathesis process using the latter. Catalyst is essentially composed of transition metal or oxide thereof, or a mixture of such metals, or oxides thereof deposited on high-purity silicon dioxide containing less than: 150 ppm magnesium, 900 ppm calcium, 900 ppm sodium, 200 ppm aluminum, and 40 ppm iron. When pure 1-butene comes into interaction with this catalyst under metathesis reaction conditions, reaction proceeds with 2-hexene formation selectivity at least 55 wt %. Use of catalyst according to invention in olefin metathesis process minimizes double bond isomerization reactions.

EFFECT: increased olefin metathesis selectivity regarding specific products.

17 cl, 2 tbl, 2 ex

FIELD: petrochemical processes and catalysts.

SUBSTANCE: invention provides rhenium oxide catalyst on anion-containing gamma-alumina-based support: 0.1-10.0% Re2O3 and 0.2-4.0% fluorine based on the weight of alumina. Catalyst is prepared by impregnating alumina, including 0.2-4.0 wt % fluorine, with rhenium compound solution, drying resulting mass, and subjecting it to heat treatment in oxidative and/or inert medium at 600-900°C. Propylene synthesis process including metathesis of C2-C4-olefinic hydrocarbon blend or ethylene alone is also described.

EFFECT: increased catalytic activity and simplified technology.

7 cl, 2 tbl, 8 ex

FIELD: petroleum processing and catalysts.

SUBSTANCE: invention relates to bismuth- and phosphorus-containing catalyst carriers, petroleum reforming catalysts prepared on these carriers, to methods for preparing both carriers and catalysts, and to petroleum reforming process using these catalysts. Described are catalyst carrier containing γ-alumina particles wherein bismuth and phosphorus are distributed essentially uniformly in catalytically efficient concentrations and a method for preparation thereof comprising (a) preparing solution containing bismuth precursor and solution containing phosphorus precursor; (b) preparing γ-alumina/alumina sol mixture; (c) mixing mixture of step (b) with solutions prepared in step (a) to produce carrier precursor containing essentially uniformly distributed phosphorus and bismuth; (d) molding; and (e) drying and calcination. Invention also describes petroleum reforming catalyst containing above-defined carrier and catalytically efficient amount of platinum, chlorine, and optionally rhenium; method of preparation thereof; and petroleum reforming process after hydrofining, which involves contacting petroleum with above-defined catalyst in presence of hydrogen at elevated temperature and pressure.

EFFECT: reduced catalyst coking velocity and achieved high stable activity of catalyst.

25 cl, 6 dwg, 4 tbl, 10 ex

FIELD: chemistry.

SUBSTANCE: invention relates to heterogeneous catalytic conversion of organic compounds, specifically to catalytic conversion of a mixture of aliphatic alcohols to a mixture of alkane-olefin hydrocarbons, particularly C5-C8 hydrocarbons. Described is catalyst for synthesis of alkane-olefin hydrocarbons based on γ-aluminium oxide, distinguished by that, the catalyst contains tungsten oxide and rhenium oxide with the following ratio of components, in wt %: tungsten oxide 1.2-6.7; rhenium oxide 0-1.3; γ-aluminium oxide - the rest. Described also is a method for synthesis of alkane-olefin hydrocarbons with an even or combined even and odd number of carbon atoms through cross-coupling reaction of ethanol or its mixture with aliphatic alcohols in the presence of the said catalyst.

EFFECT: described catalyst enables to increase output of C5-C8 olefin-alkane fractions to 45% and reduce output of gaseous C1-C2 products to 30-35% with 85-95% conversion of initial alcohols.

5 cl, 5 tbl, 3 dwg, 9 ex

FIELD: process engineering.

SUBSTANCE: invention relates to alkylation catalysts. Particularly, it relates to solid acid catalyst to be used in paraffin's alkylation by olefins that comprises: (a) zeolite selected from the group including zeolite X, zeolite Y, ZSM-20, EMT and combination thereof; (b) multimetallic material added to zeolite wherein, at least, one metal is Pt or Pd, and, at least, second metal is Ni, Co, Mn, Cr, V, Ti, Fe, or Cu. Catalyst comprising above described components additionally includes binder selected from the group consisting of aluminium oxides, silicon oxides, silicon-aluminium oxides, zirconium oxides and clays. Invention covers also the method of alkylation of paraffin by olefins that comprises the following stages: (a) using above described solid acid catalyst and (b) mixing one or more alkylation paraffins with one or more alkylation reagents, olefins, in the presence of said catalyst in conditions bringing about alkylation to produce alkylation products and catalyst regeneration in H2 conditions.

EFFECT: new active catalyst for paraffins alkylation by olefins that features longer life.

16 cl, 14 dwg, 25 ex

FIELD: chemistry.

SUBSTANCE: invention relates to oil and gas chemistry and specifically to catalysts and processes for synthesis of light alkenes, particularly propylene. Described is a catalyst for single-step synthesis of propylene from ethylene, containing rhenium oxide Re2O7 and nickel oxide NiO, attached to the surface of a carrier in form of borate-containing aluminium oxide with the following ratio of components in wt %: Re2O7 - 5-13; NiO - 4-8; B2O3 - 15-18; Al2O3 - the rest. Described is a method of preparing said catalyst, which involves preliminary production of borate-containing aluminium oxide by mixing a hydrate of aluminium oxide having a pseudo-boehmite structure with ortho-boric acid, drying at 120°C and calcination at 550°C in an air current for 16 hours, followed by saturation of the borate-containing aluminium oxide with an aqueous solution containing perrhenic acid and nickel nitrate, drying at 120°C and calcination at 550°C for 16 hours. Described also is a method for single-step synthesis of propylene from ethylene which involves passing a stream of pure (100%) ethylene through a fixed layer of the disclosed catalyst at temperature 40-150°C, pressure close to atmospheric pressure and mass flow rate of feeding ethylene equal to 1 h-1.

EFFECT: high efficiency of single-step synthesis of propylene from ethylene owing to high selectivity of formation and output of propylene.

3 cl, 1 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing propylene and butene-1 from ethylene at high temperature in a continuous or periodic mode in the presence of a catalyst deposited on a support. The method is characterised by that the process is carried out at temperature 75-110°C in the presence of a catalyst containing the following in wt %: Re - 5-15, B2O3 - 3-10, γ-Al2O3 - the balance.

EFFECT: use of the present method simplifies the process and increases selectivity thereof during formation of propylene, and also enables to obtain a mixture of propylene and butene-1 as the end product.

2 cl, 6 ex, 2 tbl

FIELD: oil and gas industry.

SUBSTANCE: catalyst for reforming of gasoline factions is described; it contains platinum (possibly rhenium), chlorine, zeolite and gamma aluminium oxide, amorphous aluminium silicate at the following ratio of the above components, wt %: platinum - 0.1-1.0; (possibly) rhenium - 0.1-0.5; chlorine - 0.1-1.0; zeolite - 0.5-3.9; amorphous aluminium silicate - 1-2; gamma aluminium oxide - the rest. Reparation method of the above catalyst is implemented by mixing of powders of aluminium hydroxide with zeolite, peptisation of mixture with water solution of acid, granulation, heat treatment of obtained granules of carrier with further application to surface of active components - platinum in the form of water solution of platinum-chlorohydric acid and chlorine in the form of hydrochloric acid, drying and annealing of catalyst; at that, peptisation of mixture of powders of aluminium hydroxide with zeolite is performed with 0.5-20% water solution of organic acid, for example lemon, acetic and oxalic acids, and heat treatment of carrier is performed at temperature of 630-700°C.

EFFECT: increasing activity, stability and selectivity of catalyst.

3 cl, 6 ex

FIELD: process engineering.

SUBSTANCE: invention relates to olefin epoxidation. method of epoxidising of olefin to olefin oxide comprises the following operations: bringing the load including, at least, oxygen and olefin, in reactor with catalyst including carrier with bimodal pore distribution in sizes, first types of pores with mean diameter of 0.01-5 mcm and second type of pores with mean diameter of pores of 5-50 mcm, catalytically active amount of silver or silver-bearing compound, promoting amount of rhenium or rhenium-bearing compound, and promoting amount of one or more alkaline metals or alkaline metal-bearing compound. Note here that said reactor has, at least, its outlet, while said olefin oxide resulted from aforesaid contact features concentration at reactor outlet of 2.2 vol. % of cesium, lithium and tungsten. It may comprise bringing the load including, at least, oxygen and olefin, in reactor with catalyst including carrier with total volume of pores of 0.41 cm3/g and bimodal pore distribution in sizes, first types of pores making 25% of total volume of pores with mean diameter of 0.7 mcm and second type of pores making 75% of total amount of pores with mean diameter of pores of 15.8 mcm, catalytically active amount of silver or silver-bearing compound, promoting amount of rhenium or rhenium-bearing compound, and promoting amount of one or more alkaline metals or alkaline metal-bearing compound. Note here that said reactor has, at least, its outlet, while said olefin oxide resulted from aforesaid contact features concentration at reactor outlet over about of 2.2 vol. % at 236°C.

EFFECT: higher selectivity and efficiency.

34 cl, 2 tbl, 1 dwg, 2 ex

FIELD: chemistry.

SUBSTANCE: invention relates to catalyst supports and catalysis. Described is a support for an ethylene epoxidation catalyst which contains aluminium oxide coupled with a stability enhancing amount of mullite, said stability enhancing amount of mullite being about 7-20% mullite. Described is an ethylene epoxidation catalyst which contains said support and use thereof in a method of converting ethylene to ethylene oxide in vapour phase in the presence of oxygen.

EFFECT: high stability of ethylene epoxidation catalyst.

31 cl, 1 dwg, 2 tbl, 2 ex

FIELD: organic chemistry, petroleum chemistry, chemical technology.

SUBSTANCE: method involves preparing ethylene and hexane-1 from butene-1 by the exchange reaction of butene-1 and the isomerization reaction of synthesized hexane-3 to hexane-1. The parent material represents a mixed butene flow wherein butene-1 is isomerized to butene-2 after separation of isobutylene followed by the isomerization reaction of butene-2 to butene-1. Butene-1 is a raw for the exchange reaction.

EFFECT: improved preparing method, simplified technology process.

32 cl, 4 tbl, 4 ex

Up!