10 results about "Alcohol synthesis" patented technology

The utility model discloses an efficient distillation and separation device for side chain alcohol synthesis, which relates to the technical field of distillation and separation devices and comprises a device table, an electric heating round seat is integrally formed at the upper end of the device table, a seat leaning plate is arranged on one side of the electric heating round seat, and the seat leaning plate and the device table are of an integral structure. An electric push rod is fixedly arranged on the outer wall of one side of the seat leaning plate through a screw; the distillation retort is mounted in the electric heating round seat, a top sealing cover is arranged right above the distillation retort, a vacuum suction pump is arranged at the rear end of the electric heating round seat, and a suction pipe of the vacuum suction pump is communicated with the interior of the distillation retort; the condensation tank is arranged on one side of the distillation tank, and the problem that the side-chain alcohol synthesis effect is affected due to the fact that the existing distillation device lacks protection on thermosensitive substances in the using process and the thermosensitive substances needed by side-chain alcohol synthesis can be decomposed by the distillation device for side-chain alcohol synthesis is solved.

The invention discloses a preparation method of a catalyst for synthesizing isomeric alcohol, and the preparation method comprises the following steps: S1, dissolving cobalt salt, copper salt and a carrier with high specific surface area in a solvent through ultrasonic dispersion, mixing, dipping, stirring, and aging to obtain a precipitate; s2, stirring and refluxing the precipitate and a 2-methylimidazole solution together, aging again, washing with absolute ethyl alcohol, and drying to obtain a catalyst precursor; and S3, calcining the catalyst precursor twice in different gas atmospheres to obtain the catalyst for synthesizing the isomeric dihydric alcohol. The catalyst prepared by the method is used for carrying out molecular addition on synthesis gas (CO + H2) and formaldehyde through a formaldehyde hydroformylation route to obtain isomeric dihydric alcohol, has the advantages of high product selectivity, good catalytic activity, environmental protection, low price and the like, can improve the selectivity of isomeric dihydric alcohol synthesis reaction, and is suitable for industrial production. The ever-increasing requirements of the chemical fiber field on low-cost and high-performance polyester raw materials are favorably met.

This invention relates to a phenylpyruvate decarboxylase mutant for the synthesis of phenylethanol and its applications, belonging to the fields of enzyme engineering and genetic engineering. To address the technical problems of low catalytic efficiency, poor substrate affinity, and insufficient stability of existing phenylpyruvate decarboxylases, which lead to low biosynthetic efficiency and limited yield of phenylethanol, making it difficult to meet the needs of industrial production, this invention provides a phenylpyruvate decarboxylase mutant for the synthesis of phenylethanol. This mutant offers a new and highly efficient synthetic element for the biosynthesis of phenylethanol, with broad application prospects and market potential in the field of higher alcohol synthesis.

The application discloses a carbon-coated nickel-based super-hydrophobic catalyst and a preparation method and application thereof, and belongs to the technical field of catalysts and high-alcohol synthesis. In the application, nickel salt and citric acid are dissolved in water, and then the obtained mixed solution is heated and stirred to obtain a precursor; the precursor is calcined under an inert atmosphere to obtain a carbon-coated nickel-based catalyst; and the carbon-coated nickel-based catalyst is ball-milled with polytetrafluoroethylene to obtain a carbon-coated nickel-based super-hydrophobic catalyst. In the application, the carbon-coated nickel-based catalyst is prepared first, and then coupled with the hydrophobic polymer polytetrafluoroethylene to form a new super-hydrophobic catalyst. The nickel-based catalyst and the polytetrafluoroethylene are ball-mixed, the hydrophobic performance of the nickel-based catalyst is improved, the water "poisoning" phenomenon of the catalyst is relieved, the coupling of low-alcohol to high-alcohol is further promoted, the yield of high-alcohol and the selectivity of C6+ high-alcohol are improved, and the application prospect is wide.

The present invention relates to a process for producing a low carbon strength oil, comprising the steps of: providing a feed mixture comprising: a carbonaceous material; one or more alcohols and / or polyols in a concentration of at least 5% by weight; converting the feed mixture at a pressure of from 10 bar to 400 bar and a temperature of from 280 DEG C to 430 DEG C; recovering a low carbon strength oil from the converted feed mixture; recovering at least a portion of the gas produced from the converted feed mixture, the converted feed mixture comprising the carbon oxides resulting from the conversion, and providing at least a portion of the recovered gas to an alcohol production plant for alcohol production using hydrogen in an alcohol synthesis process; wherein the recovery gas from the converted feed mixture is used in the alcohol production plant to produce at least a portion of the alcohol forming portion of the feed mixture.

The application discloses a preparation method of a carbon shell limited type nickel-bismuth-titanium composite catalyst and application of the catalyst in high-carbon alcohol synthesis, and belongs to the technical field of catalysts. The preparation steps of the carbon shell limited type nickel-bismuth-titanium composite catalyst are as follows: nickel salt, titanium dioxide and citric acid are dissolved in water to form a homogeneous solution; bismuth salt is added into the homogeneous solution, and a precursor is obtained through drying; the precursor is calcined to obtain the carbon shell limited type nickel-bismuth-titanium composite catalyst. The carbon shell limited type nickel-bismuth-titanium composite catalyst provided by the application exhibits excellent catalytic performance in a water-phase alcohol molecule carbon-carbon coupling reaction system for synthesizing high-carbon alcohol. While maintaining high organic phase selectivity, the high-carbon alcohol yield of the catalyst can reach 45.04%, which is significantly improved compared with traditional nickel-bismuth-based catalysts.

The present application relates to the technical field of alcohol synthesis, in particular to a kind of catalyst and its preparation method and application and the method for synthesizing methanol.The catalyst of the present application includes: modified aluminum-based metal organic framework and active component copper oxide and zinc oxide supported on the modified aluminum-based metal organic framework, wherein the modified aluminum-based metal organic framework is the product obtained by etching aluminum-based metal organic framework.The preparation method of the catalyst of the present application includes: (1) etching aluminum-based metal organic framework with a solution to obtain product 1;(2) the product 1 is precipitated with copper-zinc solution to obtain product 2;(3) the product 2 is dried and calcined to obtain the catalyst.When the catalyst of the present application is applied to the reaction of preparing methanol from synthesis gas, it has high catalytic activity and thermal stability.

The present application relates to the technical field of catalyst, in particular to a preparation method of an enhanced industrial catalyst for direct synthesis of alcohol from synthesis gas, the preparation method comprising: impregnating a SiO2 carrier with an impregnation solution to obtain a preliminary catalyst, and then aging, drying and calcining; the preparation method further comprises a structure enhancement treatment of the carrier and / or the preliminary catalyst, the structure enhancement treatment being selected from one or more of steps A and B; the step A comprises subjecting the carrier and / or the preliminary catalyst to superheated steam treatment; the step B comprises subjecting the carrier and / or the preliminary catalyst to hydrothermal reaction in an aqueous sol solution, the sol comprising one or more of a silicon sol, an aluminum sol and a zirconium sol. The preparation method greatly improves the mechanical strength of the catalyst under the premise of maintaining high activity of the catalyst through the structure enhancement treatment, and focuses on solving the requirement of the industrial catalyst for the mechanical strength of the catalyst.

The invention discloses a preparation method of a solid-phase catalyst and application of the solid-phase catalyst in catalytic synthesis of nitrophenoxy alcohol, the solid-phase catalyst with high reaction activity is obtained by performing surface modification on silicon dioxide, and the solid-phase catalyst has high reaction activity and selectivity when being used for transesterification catalytic nitrophenoxy alcohol reaction; besides, when the catalyst is used for synthesizing nitrophenoxy alcohol, the solid-phase catalyst is filled in a fixed bed, and nitrophenol and carbonic ester serving as raw materials flow through the fixed bed reactor filled with the catalyst to react, so that a reaction solvent is not needed, the reaction selectivity is good, and almost no side reaction occurs; pure nitrophenoxy compounds can be obtained only by removing unreacted raw materials and byproducts, and the method has the advantages of milder reaction conditions, convenience and rapidness in separation, suitability for industrial continuous production and the like, and has remarkable industrial potential.

This invention relates to the field of asymmetric hydrogenation technology, specifically disclosing an electron-rich chiral bisphosphine ligand, specifically L1 to L5, and disclosing the synthetic pathways of ligands L1 to L5 and the intermediate compounds 1 to 5 in the synthetic route. This invention uses L1 to L7 to complex with different transition metal precursors, such as [Rh(COD)2]BAr. F 4. A series of stable, simple-to-prepare, and low-cost catalysts were obtained, including [Rh(NBD)2]BF4, [Rh(NBD)Cl]2, Rh(acac)(CO)2, Rh(ethylene)2(acac), and [Rh(ethylene)2Cl]2. These catalysts can be used for asymmetric hydrogenation, especially in the asymmetric hydrogenation step of the N-Boc amino alcohol synthesis pathway, effectively overcoming the steric hindrance effect under different amino protecting group conditions. With the participation of this catalyst, the asymmetric hydrogenation step in the N-Boc amino alcohol synthesis pathway overcomes the technical defects of using hazardous materials in existing technologies, improving the production safety factor. Furthermore, with the participation of this catalyst, the asymmetric yield and selectivity both meet the requirements of industrial production.