Catalyst for oxidation of sulfur compounds

 

(57) Abstract:

The inventive product is a catalyst containing 0.005 to 1.0 wt.% dichlorodimethylsilane cobalt on carbon or graphite or activated carbon fabrics are impregnated with a solution of dichlorodimethylsilane cobalt, washing and drying. Feature: increased activity and stability of catalyst. table 1.

 

Same patents:

FIELD: gas treatment.

SUBSTANCE: catalyst contains alumina-supported palladium oxide, 0.80-2.54%, copper salt, 3.09-11.79%, promoter represented by phthalocyanine complex with iron or cobalt, 0.10-1.00%, and 0.50-3.00% of polyatomic alcohol.

EFFECT: enhanced efficiency of removing carbon monoxide as well as accompanying sulfur-containing impurities.

1 tbl, 21 ex

FIELD: organic chemistry.

SUBSTANCE: invention relates to improved method for production of tris(2,7-octadienyl)amine of general formula by butadiene hydrolysis with aqueous ammonia in presence water-soluble catalysts representing palladium complexes with sulfoxides namely dimethylsulfoxice (DMSO) and petroleum sylfoxide (PSO) - PdCl22.2DMSO and PdCl2.n(PSO) at 80-100°C for 3-5 h in molar ratio [Pd]:[NH4OH]:[butadiene] = 0.5-1:100:300-500. Target compound is useful in paper production, as plasticizer, in chemical water treatment, as extragents.

EFFECT: improved method for production of tris(2,7-octadienyl)amine.

1 cl, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention covers the catalyst of purification of oil, gas condensate and oil fractions from mercaptan, namely to catalyst of oxidising sweetening of the specified products. The description of the new catalyst of oxidising alkali-free oil sweetening and the method for its producing are provided, which contains 1-5% of derivative transitional metal and 95-99% of layer aluminium silicate produced by application of cuprous chloride from ammonia containing water or water-alcohol solution on aluminum silicate from groups of illite or layer silicates.

EFFECT: improved catalyst for oxidising oil purification is produced.

2 cl, 2 tbl, 5 ex

FIELD: process engineering.

SUBSTANCE: invention relates to air treatment and may be used in individual and collective protection means and for air cleaning in premises, etc. Proposed catalyst comprises palladium salt, copper salt and promoter applied on porous carrier. Note here that said promoter represents metal oxide of group I "Б" of periodic system with following ratio of components in wt %: palladium salt - 0.6-2.0, copper salt - 6-10, metal oxide of group I "Б" of periodic system - 4-26, Al2O3 - making the rest.

EFFECT: higher efficiency of purification at high moisture content and load with content of CO of up to 50 to 200 mg/m3.

1 tbl, 21 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry of organosilicon compounds, namely to elaboration of efficient sulphur-containing catalyst, applied for direct synthesis of triethoxysilane from metallurgical silicon and ethyl alcohol, as well as to method of obtaining said catalyst. Described is catalyst of direct synthesis of triethoxysilane based on copper chloride (1), representing ultrafine copper powders (1), whose spherical aggregates have diameter from 600 nm to 3 mcm and consist of globules with diameter to 200 nm, which, in their turn, represent nanoparticles of copper chloride (1) with size to 20 nm. Also described is method of obtaining described above catalyst by reductive thermolysis of chelate copper complex, obtained in situ from copper chloride dehydrate (11) in polyol medium.

EFFECT: obtaining target product with selectivity above 80%.

2 cl, 11 ex, 4 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to versions of 1,1,1,4,4,4-hexafluoro-2-butene manufacturing. One of the versions includes interaction of 2,2-dichloro-1,1,1-trifluoroethane with copper in presence of amide solvent and 2,2'-bipyridine.

EFFECT: application of claimed invention provides method in which 1,1,1,4,4,4-hexafluoro-2-butene is obtained with larger output than in methods of previous level of technology.

10 cl, 6 ex, 12 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to method of obtaining secondary amides. Method is realised by carbonylation of respective tertiary amines by means of carbon monoxide in presence of catalyst, containing less than 750 parts per million (ppm) of palladium, and halogen-containing promoter.

EFFECT: increased catalytic activity of catalyst with reduction of palladium concentration and increase of reaction selectivity.

39 cl, 7 tbl

FIELD: chemistry.

SUBSTANCE: catalytic system of ethylene in 1-hexene trimerisation includes a chromium (III) complex with a diphosphoric ligand of the general formula [CrCl3[(Ph2P(1,2-C6H4)P(Ph)(1,2-C6H4)(R)](THF)], where R is a hydrocarbon radical or a heteroatom-containing hydrocarbon group, which is in a phenyl substituent in the ortho-position relative to one of the phosphorus atoms. A source of chromium (III) is represented by tris(tetrahydrofuran)chromium chloride, and an activator, representing a mixture of solutions of trimethylaluminium and partially hydrolysed trimethylaluminium in toluene or methylcyclohexane. The molar ratio of the catalytic system components [Cr] : partially hydrolysed trimethylaluminium : trimethylaluminium constitutes 0.03-1.09%:6.95-31.92%:67.39-92.81%.

EFFECT: obtaining high selectivity by 1-hexene with the simultaneous reduction of the quantity of ethylene polymerisation byproducts in the process of trimerisation.

2 cl, 2 tbl, 19 ex

FIELD: chemistry.

SUBSTANCE: invention relates to organic synthesis and specifically to method of producing norbornene-substituted cyclopropane fullerene derivatives and synthesis of high-molecular compounds on its basis. Method for producing norbornene-substituted generally formulated cyclopropane fullerene derivatives (9) by reacting the fullerene C60 with complex ester of Formula 8, taken in the molar ratio between fullerene C60: ether = 1: 1, in the presence of solvent and base at temperature 20-25 °C for 0.5-1.0 hours. Invention also relates to a method of producing polymers by polymerising norbornene-substituted cyclopropane fullerene derivatives of general formula (9) in the presence of I-generation Grubb's catalyst of general formula (10), taken in molar ratio of Fullerene derivative: Grubb's catalyst I = 35:1, in atmosphere of argon and in organic solvent at temperature 20-25 °C during 12 hours, adding to the reaction mixture of ethyl vinyl ether for removal of catalyst residues, precipitation of polymer in methanol.

EFFECT: method enables to obtain norbornene-substituted cyclopropane fullerene derivatives, capable for metathesis polymerisation with formation of Fullerene containing polymers, followed by formation of thin films, serving as acceptor components in photovoltaic devices.

3 cl, 3 dwg, 2 ex

FIELD: petroleum chemistry, chemical technology.

SUBSTANCE: crude alpha-olefin is heated, raw vinylidene olefins are isomerized in the presence of catalyst and alpha-olefin is separated from isomerized vinylidene olefin by rectification. Separation of alpha-olefin is carried out for at least two successive steps at similar temperatures on top of vat and reducing pressure of rectifying column at each following step. Condensed phase removing from top of the rectifying column at previous step is fed to feeding zone of the following step and the rectifying column at top and vat section is sprayed. For spraying the top section of column the condensed phase removing from the top of rectifying column at the same step is used and for spraying the vat section of column the vat liquid of rectifying column at the same step is used. Separated alpha-olefin is purified additionally from oxygen-containing impurities by adsorption up to polymerization degree of purity. Raw heating, isomerization, separation and adsorption are carried out in atmosphere in inert gas. The unit used for treatment of alpha-olefin includes reactor for isomerization of vinylidene olefins in raw, rectifying column wherein feeding zone is joined with reactor outlet and wherein alpha-olefin of high purity degree is removed from the column top. The unit includes also at least one rectifying column for additional treatment of alpha-olefin of high purity from isomerized vinylidene olefins and adsorption column for separation of oxygen-containing impurities in alpha-olefin of high purity wherein the column inlet is joined with the top outlet of the last rectifying column used for additional treatment of alpha-olefin of high purity and outlet is used for removing alpha-olefin of the polymerization purity degree. Invention provides enhancing quality of the end product.

EFFECT: improved method for treatment.

8 cl, 1 dwg, 1 ex

FIELD: petrochemical processes.

SUBSTANCE: invention relates to treatment of C5-hydrocarbons in order to remove cyclopentadiene impurities, which process may be, in particular, used in rubber production industry when producing hydrocarbon monomers applicable in stereospecific polymerization processes. Treatment of hydrocarbons is accomplished with cyclohexane in presence of organic solvent and alkali catalyst, after which C5-hydrocarbons are separated from reaction products via rectification. Organic solvent is selected from alkylene glycol monoalkyl ethers including their mixtures taken in amounts 0.5 to 5.0 wt % based on C5-hydrocarbons.

EFFECT: increased degree of cyclopentadiene extraction at lower reagent consumption.

8 cl, 1 tbl, 23 ex

FIELD: organic chemistry.

SUBSTANCE: invention refers to enhanced method of propane and/or butanes flow separation from original hydrocarbons containing alkylmercaptan impurities by means of fractional distillation resulted in liquid phase and separated flow from column head at pressure providing that separated flow from column head containing propane and/or butanes has temperature within 50 to 100°C, including (i) addition to specified origin hydrocarbons an amount of oxygen sufficient for mercaptan oxidation, (ii) fractional distillation of produced mixture containing at least one catalyst layer oxidising mercaptans to sulphur compounds with higher boiling temperatures and (iii) separation of sulphur compounds with higher boiling temperatures as portion of distillation liquid phase.

EFFECT: improved method of propane and/or butanes flow separation from of original hydrocarbons by means of fractional distillation resulted in liquid phase and separated flow.

8 cl, 2 tbl, 1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to method of oxidising alkane from C2 to C4 with the obtaining of corresponding alkene and carboxylic acids. The method includes the following stages: (a) contact in the oxidation reaction zone of the alkane, which contains molecular oxygen gas, not necessarily corresponding to the alkene and not necessarily water in the presence of at least one catalyst, effective with the oxidation of the alkane to the corresponding alkene and carboxylic acid, alkane, oxygen and water; (b) separation in the first separating agent at least part of the first stream of products in a gaseous stream, which includes alkene, alkane and oxygen, and a liquid stream, which includes carboxylic acid; (c) contact of the mentioned gaseous stream with the solution of a salt of metal, capable of selectively chemically absorbing alkene, with the formation of a liquid stream rich in chemically absorbed alkene; (d) isolation from the flow of the solution of salt of the metal. The invention also relates to combined methods of obtaining alkyl-carboxylate or alkenyl-carboxylate (for example vinyl acetate), moreover these methods include oxidising of alkane from C2 to C4 with the obtaining of corresponding alkene and carboxylic acid, isolation of alkene from the mixture of alkene, alkane and oxygen by absorption using the solution of the salt of metal and extraction of the stream rich in alkene from the solution of the salt from metal for using when obtaining alkyl-carboxylate and alkenyl-carboxylate.

EFFECT: improved method of oxidising alkane from C2 to C4 with the obtaining of corresponding alkene and carboxylic acids.

46 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention is referred to the area of hydrocarbons preparation by catalytical hydrodeoxygenation of products of fast pyrolysis of a biomass and working out of the catalyst for this process. The catalyst of oxygen-organic products hydrodeoxygenation of fast pyrolysis of lignocellulose biomasses, containing either precious metal in amount of no more 5.0 wt % or containing nickel, or copper; either iron, or their combination in a non-sulphide restored shape in amount of not more than 40 wt % and transitive metals in a non-sulphide shape in amount of not more than 40 wt %, carrying agent - the rest, is described. Three variants of the catalyst preparation method, providing application of transition metals on the carrying agent by a method of impregnation of the carrying agent solutions of metal compounds are described, or simultaneous sedimentation of hydroxides or carbonates of transition metals in the presence of the stabilising carrier, or the catalyst is formed by joint alloying/decomposition of crystalline hydrate nitrates of transition metals together with stabilising components of zirconium nitrate type. The process of oxygen-organic products hydrodeoxygenation of a biomass fast pyrolysis is performed using the above described catalyst in one stage at pressure of hydrogen less than 3.0 MPa, temperature 250-320°C.

EFFECT: increase stability in processing processes of oxygen-containing organic raw materials with the low content of sulphur, and also soft conditions of process realisation.

10 cl, 12 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention refers to the method of purification of paraffin hydrocarbons from methanol admixtures. The said purification is carried out in the presence of hydrogen on the catalyst containing one of the metal selected from Ni and Pd applied on the inert carrier at temperature 30-100°C, mole excess hydrogen : methanol in the range (5-50): 1 and volume hydrocarbons feed rate 1-6 hrs.-1.

EFFECT: simplifying and cheapening of the process.

1 cl, 9 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a method of extracting isobutylene from an isobutylene containing fraction through hydration of the isobutylene containing fraction, obtaining a tert-butanol containing fraction and its subsequent dehydration. The method is characterised by that, dehydration is done in two stages. At the first stage, temperature is kept at 90-120°C and pressure at 1-3 kgf/cm2 and concentrated isobutylene and an aqueous solution of tert-butyl and sec-butyl alcohol are extracted, from which concentrated sec-butyl alcohol and an isobutylene containing fraction, which is taken for hydration, are extracted at the second stage. Process at the second stage is carried out at temperature 100-130°C and pressure 2-6 kgf/cm2.

EFFECT: use of the given method allows for extracting isobutylene without butene or butadiene impurities, and reduction of tert-butyl alcohol loss.

1 cl, 1 tbl, 8 ex, 1 dwg

FIELD: chemistry.

SUBSTANCE: C10+ fraction of alpha-olefins contaminated with aromatic C9+ compounds is extracted from the main product stream and fed into a conversion reactor where C10+ alpha olefins and aromatic C9+ components react in the presence of a Friedel-Crafts alkylation catalyst to form aromatic C19+ compounds, and the obtained aromatic C19+ compounds are separated from unreacted C10+ alpha olefins in or after the conversion reactor.

EFFECT: method simplifies removal of by-products.

10 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing pure 1-butene from C4 hydrocarbon fractions primarily containing 1-butene, 2-butene, and butane(s) with a 1,3-butadiene and isobutene impurity, involving preparation of a mixture primarily containing 2-butenes via rectification, catalytic isomerisation of 2-butenes into 1-butene and extraction of 1-butene via rectification, characterised by that at least catalysed isomerisation of 1-butene into 2-butene in said fraction is carried out at temperature lower than 120°C, as well as rectification with continuous removal of isobutane, isobutene and 1,3-butadiene in the distillate and obtaining a residual stream primarily containing 2-butene and n-butane, in which rectification conditions are maintained such that concentration of 1,3-butadiene and isobutene with respect to the sum of 2-butene is not higher than standard limits in the desired 1-butene. A large portion of n-butane is separated from the residual stream via extractive rectification with a polar agent and catalysed isomerisation of 2-butenes to 1-butene is carried out at temperature higher than 120°C, while continuously extracting the formed 1-butene via rectification.

EFFECT: high efficiency of the method.

14 cl, 5 ex, 4 tbl, 2 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to developing a catalyst and a process for obtaining hydrocarbons via catalytic hydrodeoxygenation of products of processing plant biomass. The invention describes a catalyst for hydrodeoxygenation of organooxygen products of processing plant biomass, which is a complex composite containing transition metals and is a mixed oxide of the following type: where Mi is a transition metal in oxide form, other than nickel or boron, 2≤n≤5, with atomic ratio from 0.01-99, mainly from 7 to 99, and a stabilising additive in amount of not more than 30 wt %. The invention also describes a process for hydrodeoxygenation of organooxygen products of processing plant biomass, which is carried out in a single step at hydrogen pressure 0.5-20 MPa, temperature 250-320°C in the presence of the catalyst described above.

EFFECT: high activity of the disclosed non-sulphided catalysts, which enable to conduct a process for hydro-deoxygenation of oxygen-containing compounds - model compounds of products of processing plant biomass at high substrate/catalyst ratios.

4 cl, 24 ex, 3 tbl

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