33 results about "Cobalt hydrocarbonyl" patented technology

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 an octahydro cyclopentenopyridine (c) carboxylic acid derivative and a preparing method thereof, providing basis for designing and preparing compounds with different biological activities. A chemical structural formula is shown in the fight formula, wherein, R1 is one of alkoxy, bydroxy and amine. R2 and R3 are one of bydroxy, fluorine and hydrogen. N protecting group is tertbutyloxycarbonyl, benzyloxycarbonyl or benzyl. The compounds are optically pure. Starting from natural methionine ester or hydrochloride thereof, the compound of (S)-2-((benzyloxycarbonyl)(propargyl)-amine)butane-3-carboxylic ester (5) is obtained through substitution, oxidation and elimination. After reactions of cobalt carbonyl catalytic cyclization, and the like, (S)-2-benzyloxycarbonyl-5-octahydro cyclopentenopyridine (c)-1- carboxylic ester is obtained. Series of deritative compounds are obtained through reduction of carbonyl, fluorination, chiral separation, hydrolysis and condensation.

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 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 synthesizing malonic ester by one-pot carbonylation, which is characterized in that: under the conditions of a temperature at 40-80 DEG C and a pressure of carbon monoxide at 0.5-4 MPa, cobalt salts, zinc powders or iron powders, acetate chloride, C1-C6 alcohols and alkalis are added into a carbonylation reaction kettle. The one-pot method for synthesizing the malonic ester reaches a total conversation rate of the acetate chloride of 100% and a total selectivity of the malonic ester of 100%. The method disclosed by the method avoids the pre-preparation technological progress of carbonyl cobalt, is high in yield, gentle in reaction condition, simple and easy in technology.

The invention relates to a synthesis method of 3-hydroxy propionate. The method mainly solves the problem that the selectivity of the 3-hydroxy propionate in the prior art is low. The synthesis method of the 3-hydroxy propionate comprises the following steps: i, enabling the ligand as shown in the formula (I) to perform the complexing reaction with cobalt carbonyl in a solvent to obtain a catalyst solution, wherein the solvent is the alcohol or the solvent containing the alcohol; R1 to R3 are independently selected from one of alkyl or alkenyl, aryl or substituted aryl, and heterocyclo, and R1 to R3 independently contain 1 to 6 carbon atoms; ii, adding ethylene oxide and carbon monoxide in the catalyst solution, reacting to obtain the 3-hydroxy propionate. The technical scheme well solves the technical problem, and can be used for the industrial production of the 3-hydroxy propionate. The the formula (I) is shown in the description.

The invention relates to a method for synthesizing 3-hydracrylic acid ester. The method mainly solves the problem that in the prior art, catalysts in a homogeneous system are difficult to separate. The method for synthesizing 3-hydracrylic acid ester includes the following steps that firstly, a ligand and cobalt carbonyl are subjected to a coordination reaction in an alcohol solvent to obtain turbid liquid of a catalyst; secondly, ethylene oxide and carbon monoxide are added, and a reaction is conducted to obtain 3-hydracrylic acid ester. According to the technical scheme, the ligand is selected from 4-vinylpyddine homopolymers or copolymers containing 4-vinylpyddine monomeric units, the technical problem is well solved, and the method can be used in industrial production of 3-hydracrylic acid ester.

The invention relates to a preparation method and application of a carbonyl cobalt catalyst through which 3-methyl lactate is prepared in an ethylene oxide methyl esterification mode. The preparation method of the carbonyl cobalt catalyst is characterized in that cobalt powder is used as a reducing agent, soluble cobalt salt and cobalt powder and an auxiliary reducing agent are placed into a high-pressure reaction kettle according to a mole ratio to be sealed, gas in the reaction kettle is replaced with inert gas, and stirring, cooling and centrifugal separation are carried out to obtain the carbonyl cobalt catalyst. The preparation method of the carbonyl cobalt catalyst is low in cost and has the better activity and selectivity compared with other preparation methods of the carbonyl cobalt catalyst, and no other carbonyl compound is produced in the preparation method; however, if manganese powder, zinc powder, iron powder, nickel powder and the like are adopted, corresponding carbonyl compound by-products are produced, impurities are introduced, and then the catalytic effect of the catalyst is affected. The selectivity and yield of the carbonyl cobalt catalyst through which the 3-methyl lactate is prepared in the ethylene oxide methyl esterification mode are high.

The invention relates to a preparing method of 3-hydroxypropionic acid ester, and aims to solve the problem that a catalyst under a homogeneous system is difficult to separate in the prior art. The preparing method of the 3-hydroxypropionic acid ester comprises the steps of making ligand and cobalt carbonyl conduct coordination reaction in a solvent to obtain catalyst solution, wherein the solvent is alcohol or a solvent containing the alcohol, the ligand comprises a crosslinked polystyrene skeleton and -CH2XR perssad which is connected to benzene ring in the crosslinked polystyrene skeleton, wherein X is chosen from one of O atom, S atom and NH radical, R is chosen from one of 2-pyridyl, 3-pyridyl, 4-pyridyl, 5-quinolyl, 6-quinolyl, 7-quinolyl and 8-quinolyl; adding ethylene oxide and carbon monoxide into the catalyst solution to conduct reaction so as to obtain the 3-hydroxypropionic acid. According to the technical scheme, technical problems are favorably solved, and the preparing method can be applicable to the industrial production of 3-hydroxypropionic acid ester.

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.

The invention discloses an in-situ carbonylation method straight-through liquid sodium phenylacetate synthesis method, which comprises the following steps of adopting cobalt salt and carbon monoxide as raw materials, adopting methanol as a solvent, adopting sodium thiosulfate, sodium sulfide and manganese metal as auxiliary materials, and carrying out low pressure synthesis under a stirring condition to obtain a cobalt carbonyl catalyst, introducing carbon monoxide into the catalyst system, adding benzyl chloride and liquid caustic soda in situ, and carrying out low-pressure synthesis under astirring condition to obtain sodium phenylacetate, carrying out in-situ aeration, cobalt and manganese precipitation and solid-liquid separation in a synthesis system, collecting a separation solution, and distilling to obtain a distilled concentrated solution, and performing decoloration, salt leaching and concentration on the distilled concentrated solution to obtain a sodium phenylacetate concentrated solution which can be directly used for penicillin fermentation. The synthesis method disclosed by the invention is simple to operate, continuous in process unit, free of repeated process units in the process and in accordance with atom economy, and the prepared sodium phenylacetate is high in purity and high in yield. No acidic wastewater is generated in the process treatment process, nophenylacetic acid containing peculiar smell is generated, the wastewater treatment cost is low, and the process is environmentally friendly.

The invention relates to a synthesis method of methyl glycolate, which comprises the following steps: under the condition of water insulation and oxygen insulation, contacting polyformaldehyde, a solvent, organic carboxylic acid, a stabilizer and a cobalt carbonyl catalyst, and introducing CO to carry out carbonylation reaction to generate glycollic acid; and separating the carbonylation product from the solvent, and carrying out esterification reaction on the carbonylation product and methanol to generate methyl glycolate. The method has the characteristics that the catalyst is non-corrosive to reaction equipment, the direct separation of the product and the solvent and the direct recycling of the solvent are realized, and the energy consumption of the separation process and the production cost are effectively reduced.

The invention provides a method for preparing beta-lactone through carbonylation of an epoxy compound, which comprises the following step: in the presence of a porphyrin gallium complex and cobalt octacarbonyl, by taking CO as a carbonyl source, converting the epoxy compound into a beta-lactone compound through a carbonyl insertion ring expansion reaction. The method provided by the invention has efficient catalytic activity and excellent chemical selection, does not need a tedious catalyst preparation process, avoids the use of high-toxicity chromium metal and sensitive carbonyl cobalt salt, is high in catalyst stability, can be fed in air, is simple to operate, and is easy for large-scale production.

The invention discloses a supported CoxMy intermetallic compound catalyst and a preparation method thereof, and a method for catalyzing hydroformylation reaction of olefin to generate aldehyde by using the supported CoxMy intermetallic compound catalyst. The catalyst comprises 1-10 parts of Co, 1-30 parts of M and 40-98 parts of a carrier, wherein M is Ga, Sn, In or Ge. When the supported CoxMy intermetallic compound catalyst provided by the invention is applied to catalysis of hydroformylation reaction of olefin to generate aldehyde, loss of active metal can be remarkably avoided, and the supported CoxMy intermetallic compound catalyst also has straight-chain aldehyde selectivity comparable to the straight-chain aldehyde selectivity of a homogeneous cobalt carbonyl catalyst; and the supported CoxMy intermetallic compound catalyst is easily separated from a product after reaction, so problems in separation and recycling of the homogeneous catalyst and the product are avoided, the problem of cobalt loss caused by formation of cobalt carbonyl by a conventional heterogeneous catalyst is also avoided, and the catalyst has good industrial application prospects.