249results about "Preparation from carbon dioxide or inorganic carbonates" patented technology

The invention relates to a catalytic composition comprising: a first component which is at least a component with one or more metals from groups 3A, 4A, 5A, 6A, 7A, 8, 1B, 2B, 3B, 4B; and a second component selected from (1) at least one ionic liquid which consists of a compound formed by cations and anions and which is a liquid at ambient temperature, (ii) a matrix to which the first component is bound or on which it is supported, and (iii) a combination of the two. The invention relates to the use of said catalytic composition in a method for the insertion of carbon dioxide into an organic compound and, preferably, a compound selected from epoxides, acetals and orthoesters. The invention also relates to catalytic compositions comprising said metallic compounds.

A method for producing dimethyl carbonate from methanol and carbon dioxide using a heterogeneous catalyst is described. The heterogeneous catalyst provides both acidic sites and basic sites. The reaction can be carried out at atmospheric pressure and relatively low temperatures.

A method for producing an aromatic carbonate, comprising: (1) performing a reaction between an organometal compound and carbon dioxide to obtain a reaction mixture containing a dialkyl carbonate formed by the reaction, (2) separating the dialkyl carbonate from the reaction mixture to obtain a residual liquid, (3) reacting the residual liquid with an alcohol to form at least one organometal compound and form water and removing the water from the organometal compound, and (4) reacting the dialkyl carbonate separated in step (2) with an aromatic hydroxy compound to obtain an aromatic carbonate.

The invention discloses a direct catalytic synthesis catalyst to prepare dimethyl carbonate from methanol and carbon dioxide and the preparation and application methods of the catalyst. The catalyst of the invention consists of transitional metal soluble salt, promoter and carrier, with the weight ration from 0.01to 0.5: 0.01to 0.1:1. The preparation method is that: (1) the carrier is impregnated into the transition metal soluble salt solution; (2) the promoter is added into the solution, which is stirred in room temperature, ultrasonically dispersed and stored stationarily in room temperature; (3) the solution is dried, sintered, reduced and activated to produce catalyst. The application method is that: the catalyst is put in high pressure reactor or micro reaction device with the temperature of the catalyst bed controlled between 90 degrees centigrade to 140 degrees centigrade and the reaction pressure between 0.6 to 3.0MPa. The catalyst is applicable in direct catalytic synthesis to prepare dimethyl carbonate from methanol and carbon dioxide. The raw material sources are rich, the cost is low, the preparation method is simple and the operation is easy. The catalyst is easily separated from the products, the reaction conditions are mild and the catalyst can be used repeatedly. The catalyst has high activity and selectivity.

Disclosed herein is a method of producing 4-fluoroethylene carbonate, in which ethylene carbonate reacts with a mixture of fluorine and nitrogen gases. The method comprises feeding a mixture gas of fluorine gas and nitrogen gas into a reactor having ethylene carbonate charged therein, so as to react the ethylene carbonate with the mixture gas of the fluorine gas and the nitrogen gas. The mixture gas fed in the reactor is regulated to have a desired bubble size while passing through a gas bubble regulating column, in which a packing for a packed column is packed. In the method, EC directly reacts with F₂/N₂ mixture gas to produce FEC, thus a purification process is simple and it is possible to produce FEC at high conversion efficiency and selectivity.

The invention discloses a dimethyl carbonate supported catalyst directly synthesized by methanol and carbon dioxide and a preparation method and a use method. The catalyst adopts diatomite as carrier, transition metal copper and nickel as main components of active components and zinc, iron, cobalt and the like as additives, wherein, the weight percent of diatomite in the catalyst is 60-95%, the weight percent of the transition metals is 5-30% and the weight percent of the additives is 0-15%. The preparation method comprises the following steps: soaking the carrier in a mixed solution of soluble transition metal salt and the additives, dispersing with ultrasound, evaporating and drying, calcining and reducting with hydrogen to obtain the supported catalyst. The use method comprises the following steps: placing the catalyst in a reaction device, adjusting the molar ratio of gas phase methanol to carbon dioxide to 2:1-3:1, and performing a reaction at 110-140 DEG C under the pressure of 0.6-3.0 MPa. The catalyst has the advantage of simple preparation steps, good stability and high catalytic efficiency and overcomes the defect that the carrier used by the existing catalyst needs be processed through complicated steps for pretreatment and has high price and instable catalytic performance.

A method for producing a carbonic ester, comprising (1) performing a reaction between an organometal compound having a metal-oxygen-carbon linkage and carbon dioxide to obtain a reaction mixture containing a carbonic ester formed by the reaction, (2) separating the carbonic ester from the reaction mixture to obtain a residual liquid, and (3) reacting the residual liquid with an alcohol to form an organometal compound having a metal-oxygen-carbon linkage and form water and removing the water from the organometal compound, wherein the organometal compound obtained in step (3) is recovered for recycle thereof to step (1).

The invention provides a pyrolysis gasification coupling integrated poly-generation system and process for the coal chemical industry. The system comprises a coal preparation unit, a pyrolysis-gasification coupling system A and a poly-generation system B, wherein the poly-generation system B comprises a purified gas separation unit connected with the purified gas outlet of the pyrolysis unit, a purified tar separation unit connected with the purified tar outlet of the pyrolysis unit, and a chemical product synthesis unit and an IGCC (Integrated Gasification Combined Cycle) unit which are respectively connected with purified gasification gas outlet of the gasification unit; and the purified tar separation unit is sequentially connected with a coal tar hydrofining unit and an oil product separation unit. The pyrolysis gasification coupling integrated poly-generation system and process can be used for organically combining coal pyrolysis gasification and the production process of oil, gas, chemicals, electricity and heat to realize integration of material conversion and energy conversion, maximize classified utilization, value promotion, utilization efficiency and economical benefit of coal resources, and improve the energy utilization efficiency.

The double-function catalyst for synthesizing cyclic carbonate and methyl carbonate includes main catalyst quadridentate Schiff base aluminum complex (R1)(R2)SalenAlX, where R1 and R2 is H, Cl-C6 alkyl, alkoxy Cl, Br, NO2 and other group; and X is C1, Br, I, OR NO3, CH3COO, ClO4 BF4 and other one valent negative ion, and cocatalyst being organic compound YR3, where Y is group V element and R3 is C2-C12 alkyl or aryl, with the molar ratio between the main catalyst quadridentate schiff base aluminum complex and the cocatalyst being 0.05-1. The catalyst can catalyze the reaction of epoxy compound with Co2 to synthesize cyclic carbonate and catalyze the exchange reaction of cyclic carbonate with methoxide to synthesize methyl carbonate in high efficiency.

The present invention relates to an improved epoxidation process and an improved epoxidation reactor. The present invention makes use of a reactor which comprises a plurality of microchannels. Such process microchannels may be adapted such that the epoxidation and optionally other processes can take place in the microchannels and that they are in a heat exchange relation with channels adapted to contain a heat exchange fluid. A reactor comprising such process microchannels is referred to as a “microchannel reactor”. The invention also provides a method of installing an epoxidation catalyst in a microchannel reactor. The invention also provides a method of preparing an epoxidation catalyst. The invention also provides an epoxidation catalyst. The invention also provides a certain process for the epoxidation of an olefin and a process for the preparation of a chemical derivable from an olefin oxide. The invention also provides a microchannel reactor.

A process for the production of alkyltin alkoxides which comprises subjecting at least one alkyltin compound selected from among organotin compounds having tin-oxygen-tin linkages as the starting compound and a hydroxyl compound as the reactant to dehydration to obtain an alkyltin alkoxide corresponding to the starting compound and the reactant, characterized by continuously feeding the starting compound and the reactant into a reactor, discharging a water-containing low boiling point component from the reactor, and continuously withdrawing a reaction fluid containing an alkyltin alkoxide as the bottom from the reactor.

The invention relates to a preparation method and application of an ionic liquid functionalized Al-MCM-41 mesoporous material. The preparation method comprises the following steps of: preparing a solution by taking CTAB (Cetyltrimethyl Ammonium Bromide) as a template agent, TEOS (Tetraethyl Orthosilicate) as a silicone source and aluminum nitrate or sodium metaaluminate as a precursor according to a molar ratio, and crystallizing, filtering, washing, drying and roasting the solution to obtain Al-MCM-41; obtaining Al-MCM-41-Cl through coupling; reacting the Al-MCM-41-Cl with N-methylimidazole,and carrying out cooling, suction filtering, washing and drying to obtain the ionic liquid functionalized mesoporous material Al-MCM-41-Im. The invention has the advantages that the method has simpleprocess, and the ionic liquid functionalized Al-MCM-41 mesoporous material has ordered and uniformly distributed pore structure and acid-situ surface and can be used as a catalyst for a reaction between epoxypropane and carbon dioxide to produce propylene carbonate.

The present invention relates to an improved epoxidation process and an improved epoxidation reactor. The present invention makes use of a reactor which comprises a plurality of microchannels. Such process microchannels may be adapted such that the epoxidation and optionally other processes can take place in the microchannels and that they are in a heat exchange relation with channels adapted to contain a heat exchange fluid. A reactor comprising such process microchannels is referred to as a “microchannel reactor”. The invention also provides a method of installing an epoxidation catalyst in a microchannel reactor. The invention also provides a method of preparing an epoxidation catalyst. The invention also provides an epoxidation catalyst. The invention also provides a certain process for the epoxidation of an olefin and a process for the preparation of a chemical derivable from an olefin oxide. The invention also provides a microchannel reactor.

The invention belongs to the technical field of chemical industry, relates to a preparation method and application method of an iron-zirconium composite oxide catalyst, and is used for solving the problems that at present, the catalyst has low activity and is difficult for separation, recovery and reutilization in a catalytic process for direct synthesis of dimethyl carbonate from carbon dioxide and methanol. The catalyst provided by the invention is composed of iron and zirconium oxides, wherein the molar ratio of iron to zirconium is (10:1)-(0.5:1); the catalyst is prepared by adopting a sol-gel method, is used for reaction between CO2 and CH3OH for direct synthesis of dimethyl carbonate at the reaction temperature of 80-180 DEG C and CO2 pressure of 3-7MPa ( room temperature); and compared with the existing ZrO2 catalyst and H3PO4-treated ZrO2 catalyst, both the activity and selectivity of the catalyst are greatly improved.

The invention discloses a synthesizing method of dimethyl carbonate through oxidizing and oxonating liquid phase of carbinol in the chemical technological domain, which comprises the following steps: adopting ion liquid as solvent and metal copper salt as catalyst; setting the weight rate of carbinol and ion liquid at 1: 4-10: 1 and the rate of catalyst and carbinol at 1: 100-1: 10; reacting under 80-180 Deg C; setting the initial total pressure of CO and O2 at 0.5-6.0Mpa with the molar rate of CO and O2 at 100: 1-2: 1 for 1-6h; realizing the synthesizing reaction to form dimethyl carbonate with single-course transmission rate at 10-20% and object product selectivity not less than 95%.

The invention relates to a method used for preparing dimethyl carbonate via direct reaction of carbon dioxide with methanol. According to the method, a midazole bicarbonate ionic liquid is taken as a catalyst and a dehydrating agent, direct reaction of carbon dioxide with methanol at mild conditions is carried out so as to obtain dimethyl carbonate. Compared with the prior art, the method possesses following advantages: the midazole bicarbonate ionic liquid is taken as both as the catalyst and the dehydrating agent, so that the production process of dimethyl carbonate is simplified; the method is green and economical; the conversion rate of methanol is as high as 54%; and the selectivity of dimethyl carbonate production is as high as 99%.

The invention discloses a monolithic catalyst for synthesizing dimethyl carbonate. The catalyst is composed of active components Cu and Ni nanoparticles, a carrier that is a triphenylphosphine porouspolymer and a honeycomb ceramic matrix. The Cu and Ni nanoparticles are loaded on the triphenylphosphine porous polymer POP-PPh3, and the honeycomb ceramic matrix is coated with the triphenylphosphineporous polymer POP-PPh3 loaded with the CuNi nanoparticles to form the CuNi/POP-PPh3 monolithic catalyst. The application method comprises the following steps: putting the CuNi/POP-PPh3 monolithic catalyst into a steel pipe of a fixed bed reactor, and introducing CO2 for 5 minutes to remove other gases in a reaction system; heating to 120-180 DEG C, transporting the liquid methanol to a preheaterthrough a high-pressure constant-flow pump for gasification treatment, and reacting the mixture for 2-6 hours with the molar ratio of CH3OH to CO2 in the reaction gas being 1-3 to obtain the dimethylcarbonate. The monolithic catalyst provided by the invention is used for one-step synthesis of DMC from CO2 and methanol, and the yield of DMC exceeds 8%.