34 results about "Cobalt hydrocarbonyl" patented technology

This invention provides a method for preparing 2, 4, 5-trifluorophenylacetic acid. The method comprises: (1) reacting 1,2,4-trifluorobenzene and chlorinating agent in paraformaldehyde to obtain 2,4,5-trifluorobenzyl chloride; (2) performing carbonylation reaction with CO in the presence of catalyst to obtain 2,4,5-trifluorophenylacetic acid. The catalyst is alkali cobalt tetracarbonyl. The method has such advantages as few reaction procedures, and mild reaction conditions, and is suitable for industrial production of 2, 4, 5-trifluorophenylacetic acid.

The invention discloses a catalyst for treating organic wastewater and a preparation method thereof. The catalyst is a metal carbonyl loaded catalyst, a precursor of the catalyst is one or a combination of ruthenium carbonyl and cobalt carbonyl, a second component Ce or Fe is added at the same time, and a carrier of the catalyst is selected from one or a compound oxide of active carbon, gamma-Al2O3 and TiO2. The catalyst can be used for oxidizing and degrading different organic matters with various concentrations in water under a milder condition so as to greatly reduce COD (Chemical Oxygen Demand) in wastewater and improve the removal efficiency of the COD in the wastewater.

The invention provides a method of recovering molybdenum and cobalt from a waste cobalt-molybdenum catalyst. The method comprises the following steps: adding alkali into the waste cobalt-molybdenum catalyst, then roasting the waste catalyst, carrying out washing and filtering, adding an acid into an obtained filtrate to adjust a pH value, filtering a reacted solution, with filter residue being aluminum hydroxide for recovery of aluminum and a filtrate being a molybdenum-containing solution, adjusting the pH value of the molybdenum-containing solution to obtain molybdic acid deposition, washing the molybdic acid deposition with distilled water to wash out impurities adhering on molybdic acid and carrying out roasting so as to obtain molybdenum trioxide; and adding alkali for roasting, drying washed filter residue, introducing carbon monoxide gas after moisture is totally removed and introducing tail gas into a collection container after condensation at the same time, wherein carbonyl cobalt is condensed to form a solid, which allows metal cobalt to be recovered, the tail gas is cyclically used, and reacted filter residue after introduction of carbon monoxide gas can be used for recovery of carriers like magnesium and rare earth. According to the method, used raw materials are cheap, which is beneficial for cost control; steps of the method are simple, so recovery flow of metal cobalt and molybdenum is shortened, and a recovery rate is increased.

A process for producing purified cobalt from a mixture comprising metallic species of cobalt and metallic species of at least one of the group consisting of nickel and iron, comprising producing a metal carbonyl mixture of cobalt carbonyl and at least one of nickel carbonyl and iron carbonyl from the metallic species mixture; separating the nickel carbonyl and / or iron carbonyl from the cobalt carbonyl; treating the cobalt carbonyl with an effective amount of a complexing gaseous mixture of nitric oxide / carbon monoxide to produce cobalt nitrosyl tricarbonyl; and decomposing the purified cobalt nitrosyl carbonyl to provide purified cobalt and regenerated complexing gaseous mixture for recycle. The process provides cobalt of improved quality in an optionally, Continuous and closed-loop manner. Preferred processes include either aqueous and / or gaseous process steps.

In a hydroformylation reaction, the circulation and recovery of cobalt carbonyl in a cobalt catalyst cycle using carbonylate as an intermediate and acidification thereof, is improved by supplying an aqueous sulfuric acid solution containing less than 16% wt of sulfuric acid to the carbonylate to control sulfuric acid concentration in the carbonylate / acid mixture, before accounting for any acid consuming reaction, to a value of from 2% to 10% by weight. Single step and multistage liquid / liquid extraction techniques as well as vapor / liquid extraction techniques followed by the absorption of cobalt from the vapor in an organic liquid both benefit from this improvement.

A method for forming a cobalt-containing thin film by a vapor deposition process is provided. The method comprises using at least one precursor corresponding in structure to Formula (I); wherein R1 and R2 are independently C2-C8-alkyl; x is zero, 1 or 2; and y is zero or 1; wherein both x and y can not be zero simultaneously.

The invention relates to a hexabenzocoronene compound containing thioether in the dovetail-like side-chain and a preparation method thereof. The structural general formula of the compound is described in the specification, and in the formula, R is a dovetail-like alkyl group. According to the invention, a ring trimerization-ferric trichloride co-coronene process is employed, 2-(4'-bromophenyl)ethanol is used as a raw material; mercaptan is produced after hydroxyl bromination and thiourea salt reaction; then thioether is prepared; a palladium catalyzed direct coupling reaction is selected so as to obtain a diphenylacetylene derivative; the diphenylacetylene derivative undergoes ring trimerization under the catalysis of carbonyl cobalt so as to produce corresponding hexaphenylbenzene; and hexaphenylbenzene is oxidized with ferric chloride anhydrous in dichloromethane and nitromethane and then reduced with a system consisting of iodine and sodium borohydride, then methanol is added, precipitation is carried out so as to obtain a yellow solid, and the yellow solid is purified. The dovetail-like side-chain is favorable for reduction of the melting point of the compound and enables a compound with a certain chain length to have the properties of discotic liquid crystals and to have mesogenic behavior, so reference is provided for designing of discotic liquid crystals. The hexabenzocoronene compound is extensively applied to organic light-emitting diodes, field effect transistors and solar cells.

The invention relates to a preparation method of a hydrogen cobalt-base catalyst with CO reduction modification and reforming. The method includes the following steps of (1) preparation of a catalyst precursor with an impregnation method, wherein the catalyst precursor is obtained after impregnation of an alumina carrier and a dissoluble cobalt salt solution, the catalyst precursor is dried and then calcined in a muffle furnace, and the catalyst precursor after combustion is ground into fine particles; (2) CO reduction, wherein the ground catalyst precursor is put in a reactor, and by control over reaction conditions, CO is reacted with reduced cobalt on the surface of the catalyst to produce carbonyl cobalt; through reallocation of gaseous carbonyl cobalt on the surface of the catalyst, carrying of cobalt species is achieved, so that the particle size of the cobalt species on the surface of the catalyst is effectively reduced, which is beneficial to ethanol water vapor reforming hydrogen production. By the control over the reaction conditions, carbonyl cobalt is produced in the CO reduction process of the catalyst, so that self-dispersal of the cobalt species is achieved, and dispersity of cobalt on the surface of the catalyst is improved.

The invention discloses a 1,1,3,3-tetra alkyl guanidine carbonyl cobalt metal organic ion liquid. A structure formula of the ion liquid is shown in the description. The invention also discloses a preparation method of the ion liquid and application of the ion liquid in synthesizing of 3-hydroxy carboxylate by epoxy compound hydroesterification. The 1,1,3,3-tetra alkyl guanidine carbonyl cobalt metal organic ion liquid has the advantages that guanidine cation has the double functions of stabilizing tetra carbonyl cobalt cation and using as a Lewis acid to activate epoxy compound primer; compared with the traditional Co2(CO)8 / azacycle catalytic system, the use of a nitrogen-containing organic matter is avoided; the ion liquid can be recycled and repeatedly used, the use rate of carbonyl cobalt is improved, and the production cost is reduced; the stability of the 1,1,3,3-tetra alkyl guanidine carbonyl cobalt metal organic ion liquid is high, the ion liquid can be repeatedly applied to catalysis of epoxy compound hydroesterification for multiple times, the catalytic reaction effect is good, and the separation and recycling are convenient.

The invention relates to coronene compound containing thioether in lateral chain and the preparation method thereof. The structural formula of the compound is shown in the descriptiopn: R refers to alkyl. In the method, ring trimerization- ferric trichloride coronene method, namely 2- (4'- bromophenyl) ethanol is taken as raw material, through hydroxyl bromo, thioether is formed, palladium-catalyzed is selected for direct coupled reaction, so as to obtain diphenylacetypene ramification, under the catalysis of cobalt carbonyl, corresponding hexaphenylbenzene is produced by trimerization cyclization. Anhydrous ferric trichloride is oxidized in methylene dichloride and nitromethane, then reduction is performed by using iodine and sodium borohydride system, and after drying, THF (tetrahydrofuran) is used for recrystal. The synthetic method provided by the invention is simple, is high in yield, and can be extensively used in organic LBD, field-effect tubes and solar batteries.

The invention discloses a method for preparing 2-(4-isobutylphenyl)propionate from 1-(4-isobutylphenyl)ethanol (IBPE). According to the present invention, an imidazole functionalized ion liquid containing cobalt carbonyl and polyether is adopted as a catalyst to carry out a hydroesterification reaction of IBPE, carbon monoxide and an alkyl alcohol to prepare 2-(4-isobutylphenyl)propionate. The method has the following characteristics that: precious metal use is avoided, catalytic activity is good, and the catalysis system is easy to separate, and can be recycled.

The invention discloses a preparation method of 5-hydroxy-7,7-dimethyl-2H-indanone. The method is achieved through the following steps: 1) cooling a tetrahydrofuran solution of methyl 3,3-dimethyl-4-pentenoate and dropwise adding a reducing agent and stirring so as to obtain 3,3-dimethyl-4-pentenol; 2) adding an oxidizing agent to the 3,3-dimethyl-4-pentenol and stirring and reacting to obtain 3,3-dimethyl-4-pentenal; 3) adding an ether solution of3,3-dimethyl-4-pentenal into an ether solution of magnesium propargyl bromide and stirring and reacting to obtain 5,5-dimethyl-6-ene-1-alkyne heptanol; and 4) adding cobalt carbonyl into a dichloromethane solution of 5,5-dimethyl-6-ene-1-alkyne heptanol and stirring and reacting, adding N-methyl morpholine oxide and continuously reacting to obtain the target product. The raw materials used in the method are simple and easily available; the preparation method is simple; the operation steps are simple; and synthesis cost is low.

The invention relates to a synthesis method of dimethyl malonate, provides a novel carbonylation reaction synthesis route, and solves the problems of high cost, complex process and environmental pollution in the prior art. According to the technical scheme, the synthesis method of dimethyl malonate comprises the following steps: reacting cobalt carbonyl with a ligand to obtain a complex catalyst;and then adding methylal and carbon monoxide to react to obtain dimethyl malonate, wherein the ligand is a hexadentate chelated nitrogen ligand, and R is selected from n-octyl, phenyl, 4-methylphenylor phenoxy methyl. Therefore, the technical problem is well solved, and the method can be used for industrial production of dimethyl malonate.

The invention relates to the field of food detection, in particular to a preparation method of a cobalt sulfide nanomaterial and a method for detecting hydrogen peroxide with the cobalt sulfide nanomaterial. O-dichlorobenzene, oleic acid and trioctyl phosphine oxide react with an o-dichlorobenzene solution containing carbonyl cobalt, then reaction products react with an o-dichlorobenzene solution containing sulfur, the reaction products are sequentially washed and centrifuged with methanol and distilled water repeatedly, and cobalt sulfide nanomaterial powder is obtained. According to the method for detecting hydrogen peroxide with the cobalt sulfide nanomaterial, to be specific, a phosphate buffer solution of cobalt sulfide is added to a Tirs-Hcl buffer solution, then a to-be-detected solution and a TMB color developing agent are added, and whether the to-be-detected solution contains hydrogen peroxide or not is judged through observation of color reaction. The method is high in detection speed and accuracy and has better specificity to detection of hydrogen peroxide.

The invention relates to a hexabenzocoronene compound containing thioether in the dovetail-like side-chain and a preparation method thereof. The structural general formula of the compound is described in the specification, and in the formula, R is a dovetail-like alkyl group. According to the invention, a ring trimerization-ferric trichloride co-coronene process is employed, 2-(4'-bromophenyl)ethanol is used as a raw material; mercaptan is produced after hydroxyl bromination and thiourea salt reaction; then thioether is prepared; a palladium catalyzed direct coupling reaction is selected so as to obtain a diphenylacetylene derivative; the diphenylacetylene derivative undergoes ring trimerization under the catalysis of carbonyl cobalt so as to produce corresponding hexaphenylbenzene; and hexaphenylbenzene is oxidized with ferric chloride anhydrous in dichloromethane and nitromethane and then reduced with a system consisting of iodine and sodium borohydride, then methanol is added, precipitation is carried out so as to obtain a yellow solid, and the yellow solid is purified. The dovetail-like side-chain is favorable for reduction of the melting point of the compound and enables a compound with a certain chain length to have the properties of discotic liquid crystals and to have mesogenic behavior, so reference is provided for designing of discotic liquid crystals. The hexabenzocoronene compound is extensively applied to organic light-emitting diodes, field effect transistors and solar cells.