16 results about "Cyclododecatriene" patented technology

The invention relates to a method for preparing cyclododecene, which comprises the following steps: contacting a raw material mixture containing 1, 5, 9-cyclododecatriene and a first solvent with a hydrogenation catalyst for hydrogenation reaction to obtain cyclododecene, wherein the hydrogenation catalyst comprises a carrier and an active component loaded on the carrier, the carrier is phosphorus modified alumina, and the active component is palladium. The method disclosed by the invention can realize high-efficiency and high-selectivity hydrogenation of cyclododecatriene under mild reaction conditions, and has industrial application prospects.

The invention relates to a graphene supported catalyst, a preparation method thereof and a method for catalyzing epoxidation of cyclododecatriene. The catalyst prepared by taking graphene and polyoxometallate as raw materials has excellent cyclic macromolecular catalytic activity; when the catalyst is used in the epoxidation reaction of macrocyclic olefin, the raw material conversion rate and the selectivity to a target product can be obviously improved.

The present invention relates to a method for recovering and reusing a selective homogeneous hydrogenation catalyst. The present invention relates to a method for recovering a selective homogeneous hydrogenation catalyst from a second reaction resolution in which a synthesis of cyclododecene is completed after synthesizing the cyclododecene by selective hydrogenation of a first reaction solution containing cyclododecatriene, triphenylphosphine, formaldehyde, and ruthenium chloride, and the method includes: preparing the selective homogeneous hydrogenation catalyst from the triphenylphosphine, the formaldehyde, and the ruthenium chloride during the selective hydrogenation of the first reaction solution, and synthesizing the cyclododecene; mixing a solvent containing cyclododecanone with the first reaction solution; and recovering the selective homogeneous hydrogenation catalyst through evaporation separation from the second reaction solution in which the synthesis of the cyclododecene is completed.

The invention relates to a method for producing cyclododecene through cyclododecatriene hydrogenation, a catalyst used for the method and a preparation method of the catalyst, the catalyst comprises a carrier, a first active metal component and a second active metal component, the carrier is a phosphorus-modified composite oxide, the composite oxide comprises aluminum oxide and silicon oxide, and the first active metal component and the second active metal component are sequentially arranged from top to bottom. The first active metal component is palladium, and the second active metal component comprises one or more of silver, manganese, iron, cobalt, nickel, copper, zinc, tin, ruthenium, lanthanum and cerium. According to the present invention, the efficient and high-selectivity hydrogenation of cyclododecatriene can be achieved under the mild reaction condition, the raw material conversion rate and the yield of the target product cyclododecene can be significantly improved, the cost is low, and the industrial application prospect is provided.

The invention provides a preparation method of 1, 12-dodecane glycol, which comprises the following steps: by taking cyclododecatriene as a raw material, carrying out ozonization reaction to generate an ozonization intermediate, and adding a stabilizing aid into a reaction system to inhibit the reduction rate of the ozonization intermediate, so that ozonization reaction liquid can be subjected to direct quenching reaction by using hydrogen, and the 1, 12-dodecane glycol is obtained. The method has the advantages of simple operation, no generation of dangerous working conditions such as polymerization, temperature runaway and the like, realization of one-step reduction of the ozonization intermediate into long-chain diol by using more environment-friendly hydrogen as a reducing agent, low raw material cost, simple process and more competitive cost.

The application provides a cyclododecatriene preparation reaction post-processing process and system, which comprises the following steps: a termination process, in which a termination agent is mixed with a CDT reaction solution to perform catalyst quenching, so as to obtain a first mixture; wherein the termination agent comprises an alcohol, a phenol or a mixed solution of the alcohol and the phenol; a first extraction process, in which lye is used to extract the first mixture after cooling operation, so that a first oil phase is obtained and input into a second extraction process; and the second extraction process, in which pure water is used to extract the first oil phase, so that a second oil phase is obtained and input into a subsequent rectification separation process to obtain a cyclododecatriene product with high purity. The catalyst inactivation effect of the process is good, the loss rate of the CDT product obtained after the subsequent rectification separation is reduced, and the product recovery rate is high; the CDT reaction solution treated by the process avoids the equipment corrosion problem in the subsequent process, can reduce the equipment investment cost, simultaneously reduces the solid content and ensures the stable and continuous operation of the device.

A method for preparing a heterogeneous catalyst, characterized by comprising: treating MCM-41 molecular sieve with acid with a concentration of ≤1 mol / L, then mixing with silanization reagent and light aromatic hydrocarbon, stirring at 50-90 ℃ for 5-10 h, filtering and drying to obtain carrier MCM-41 molecular sieve, mixing the carrier MCM-41 molecular sieve, TiCl4 and toluene under anhydrous and anaerobic reaction conditions and nitrogen protection, stirring at 30-60 ℃ for 5-30 h, separating, washing and drying to obtain a heterogeneous catalyst composed of silanization-treated MCM-41 molecular sieve and titanium loaded thereon. The heterogeneous catalyst catalyzes the cyclotrimerization reaction of butadiene, and the reaction product contains less C16 or more products, and the selectivity of 1,5,9-cyclododecatriene is high.

The invention relates to a preparation method of 1, 5, 9-trimethyl-1, 5, 9-cyclododecatriene, in particular to a preparation method of 1, 5, 9-trimethyl-1, 5, 9-cyclododecatriene. According to the method, under the synergistic effect of the catalyst and the lewis acid, isoprene polymerization is regulated and controlled in a high-selectivity mode to generate the total E type 1, 5, 9-trimethyl-1, 5, 9-cyclododecatriene, the conversion rate of the polymerization reaction is as high as 99%, and the selectivity is as high as 89%.

The invention relates to the technical field of preparation of 1, 5, 9-cyclododecatriene, and discloses a preparation method of 1, 5, 9-cyclododecatriene, in the preparation method of 1, 5, 9-cyclododecatriene, raw materials comprise butadiene, water and a Ziegler-Natta catalyst, and the 1, 5, 9-cyclododecatriene is prepared by adopting a multi-stage continuous reaction; the multi-stage continuous reaction comprises a first-stage reaction to an Nth-stage reaction, and N is a natural number greater than or equal to 2; a first part of water is added in the first-stage reaction, and a second part of water is added in the second-stage reaction; the Ziegler-Natta catalyst comprises a main catalyst, and the ratio of the total addition amount of the water to the mass of active metal elements in the main catalyst is (0.1-8): 1. In the 1, 5, 9-cyclododecatriene production process, the butadiene conversion rate is greater than or equal to 99%, and the ctt-1, 5, 9-cyclododecatriene isomer selectivity is greater than or equal to 99%.

The invention relates to a catalyst, a preparation method thereof and a cyclododecatriene catalytic epoxidation method, graphene powder is added into preparation raw materials of the catalyst, so that the obtained catalyst has proper and ordered mesopores and macropores, and the reactivity center accessibility and diffusion performance of the catalyst are effectively improved; when the catalyst is used in the epoxidation reaction of macrocycloolefin, the catalytic reaction activity and the activity stability which are remarkably improved and the selectivity to a target product are favorably obtained.

The invention relates to a hydrogenation catalyst and a preparation method thereof, and a cyclododecene synthesis method, the hydrogenation catalyst comprises a carrier and an active component, the carrier is an aluminum-cerium composite oxide, and the active component is palladium; on the basis of the dry basis weight of the catalyst, the content of the active component is 0.1-10 wt%. The hydrogenation catalyst disclosed by the invention has good catalytic activity and selectivity, high-efficiency and high-selectivity hydrogenation of cyclododecatriene can be realized under mild reaction conditions by adopting the hydrogenation catalyst, the raw material conversion rate and the yield of a target product cyclododecene are remarkably improved, and the hydrogenation catalyst has industrial application prospects.

The present invention relates to a cyclododecatriene catalytic oxidation method, which comprises that cyclododecatriene, an oxidizing agent, an optional solvent and a catalyst are contacted to carry out an oxidation reaction, and the catalyst is a graphene-loaded polyacid catalyst. The graphene-loaded polyacid catalyst is used for catalytic oxidation of cyclododecatriene, so that the raw material conversion rate and the selectivity of the target product dodecanedioic acid can be effectively improved.

The present invention relates to a method for producing a catalyst for the selective hydrogenation reaction of cyclododecatriene and a catalyst produced by the method. The method for producing a catalyst for the selective hydrogenation reaction of cyclododecatriene of the present invention comprises: (S1) reacting ruthenium chloride with formaldehyde to produce a ruthenium complex; and (S2) adding triphenylphosphine to the ruthenium complex and conducting the reaction.

A butadiene cyclization polymerization method is characterized in that the method uses 1,3-butadiene as a raw material, and a cyclization polymerization reaction occurs at 30-90 DEG C in the presence of a heterogeneous catalyst composed of an EMM-23 molecular sieve subjected to silanization treatment and titanium supported thereon, and an alkyl aluminum chloride as a cocatalyst, so that 1,5,9-cyclododecatriene, 1,5-cyclooctadiene and 4-vinyl cyclohexene with high selectivity are obtained.

The invention relates to a cyclododecatriene hydrogenation method, which comprises: in the presence of hydrogen, contacting cyclododecatriene with a hydrogenation catalyst to carry out a hydrogenation reaction, wherein the hydrogenation reaction is sequentially carried out in n stages of slurry bed reactors which are connected in series, and hydrogen partial pressures in the n stages of slurry bed reactors are sequentially reduced along the flowing direction of materials; the hydrogenation catalyst is a heterogeneous catalyst. According to the cyclododecatriene hydrogenation method disclosed by the invention, the raw material conversion rate and the cyclododecene selectivity can be remarkably improved, the reaction time is shortened, the energy consumption and the operation cost are reduced, and industrial batch production is favorably realized.

The present application relates to 1,5,9-cyclododecatriene preparation technical field, disclose a kind of preparation method of 1,5,9-cyclododecatriene, the preparation method of 1,5,9-cyclododecatriene in the present application, raw material includes butadiene, water and Ziegler-Natta catalyst, is prepared using multistage continuous reaction;The multistage continuous reaction includes first to Nth reaction, N is the natural number of ≥2;First portion of water is added in first stage reaction, second portion of water is added in second stage reaction;Ziegler-Natta catalyst includes main catalyst, the mass ratio of the total amount of water and the active metal element in the main catalyst is (0.1~8):1.The butadiene conversion rate of the present application 1,5,9-cyclododecatriene production process is ≥99%, and ctt-1,5,9-cyclododecatriene isomer selectivity ≥99%.