39results about How to "Give full play to the catalytic performance" patented technology

The invention discloses a preparation method of a composite oxide carrier. A composite oxide gel adopted in the method of the invention is obtained by the steps of: first preparing an aluminum hydroxide sol and a water solution containing a group IVB metal complex, then mixing the sol and the water solution, adding dropping a hydrolysis promoter so as to obtain a mixed precipitate, which is then subjected to aging, washing, filtering and drying. The composite oxide gel obtained by the method can make most of group IVB metal oxides distributed on an alumina surface so as to weaken influence onan alumina pore structure, enhance the catalysis assisting effect of group IVB metal oxides, and improve the pore structure and surface performance of the composite oxide carrier. Therefore, the vulcanizing property of a catalyst with the carrier of the invention can be improved, and loaded active metals are easy for reduction.

The invention discloses a method for preparing chiral aromatic secondary alcohol. It comprises following steps: a. oxiding racemic aromatic secondary alcohol in beta- cyclodextrin containing water phase into relevant aromatic acetone by using chemical oxidant, reaction time is 6- 24 hours; b. adding reducant additive for reaction for 30 minutes, adding basic substance to moderate pH to 7.0; c. putting the quiescent cell of Rhodotorula sp.)ECU316-1 CGMCC NO.1735 into said solution to catalyze and oxide aromatic acetone into (S)- aromatic secondary alcohol; d. isolating and purifying reaction solution and getting target product. The invention combines chemical and biological method to converse racemic aromatic secondary alcohol to chiral aromatic secondary alcohol with high optical purity (above 99%). It is characterized by temperate reaction condition, simple operation, easy to prepare catalysy and good industrial development prospect.

The invention relates to the technical field of waste water organic matter treatment, specifically a method for catalytically removing bisphenol A by using coke-loaded BiOCl; the catalyst is prepared by coke pretreatment, modification, impregnation, activation and drying in sequence, and then the catalyst is placed Photoremoval in wastewater containing bisphenol A; the concentration of BiOCl in the catalyst is 0.005‑0.015 mol L ‑1 The present invention uses the microstructure of coke to load BiOCl on the coke to accelerate the catalytic efficiency of this catalyst, significantly improves the removal rate of bisphenol A in waste water, and makes the catalytically active components form an effective combination form on the coke structure, Enhanced BiOCl photogenerated electron-hole e‑‑h + Due to the high activity of the catalyst, the removal rate of bisphenol A can reach 100%, and the removal time is greatly shortened.

The present invention discloses a preparation method of composite oxide adhesive. The method comprises the following steps: preparing aluminum hydroxide sol and aqueous solution containing IVB family metal complexes, mixing the aluminum hydroxide sol and the aqueous solution, dripping hydrolyzation accelerant to obtain mixed sediment, and carrying out aging, washing, filtering and drying treatments to obtain the composite oxide adhesive. According to the preparation method, most IVB family metal oxides are distributed on a surface of alumina, influence on an alumina pore structure is weakened, catalytic action of the IVB family metal oxides is raised, advantages of the alumina and the IVB family metal oxides are fully played, and the obtained composite oxide adhesive has the characteristics of large hole capacity, high specific surface area, controllable acidity, and is suitable for being a hydrogenation catalyst carrier.

The invention relates to the technical field of wastewater organic matter treatment, in particular to a method for catalytically removing bisphenol A by using Ce-doped BiOCl-loaded coke. The method includes preparing a Ce-doped BiOCl-loaded catalyst through coke pretreatment, modification, impregnation, loading and drying in sequence; adding the catalyst into bisphenol A-containing wastewater andperforming illumination removal; wherein the molar ratio of Ce to BiOCl in the catalyst is 0.00087; the BiOCl is doped with the rare earth element Ce and is loaded on the coke by exerting the microstructure of the coke, so that the removal rate of the bisphenol A in the wastewater is remarkably improved; Ce is doped, so that the activity of a photo-induced electron hole (e<->-h<+>) pair is improved, the removal rate of the catalyst on bisphenol A reaches 100%, and meanwhile, the removal time is greatly shortened.

The invention discloses a preparation method of a composite oxide dry gel. The method comprises the following steps: 1, preparing an aluminum hydroxide wet filter cake and an aqueous solution containing a complex of IVB family metals; 2, adding the wet filter cake to the complex solution, and strongly stirring; and 3, filtering, and drying to obtain the composite oxide dry gel. According to the method, most IVB family metal oxides are distributed on the surface of alumina, so the influence of the IVB family metal oxides to the pore structure of alumina is decreased, and the co-catalysis of the IVB family metal oxides is improved, thereby advantages of alumina and the IVB family metal oxides are fully performed. The obtained composite oxide dry gel which has the characteristics of large pore volume, high specific surface area and acidic controllability is suitable as a hydrogenation catalyst carrier.

The invention belongs to the technical field of supported metalloporphyrins, and in particular relates to preparation of a silica gel supported metalloporphyrin compound and an application method thereof so as to solve the problems of preparing the metalloporphyrin compound in the prior art. The preparation steps are that: tetraphenylporphyrin, Lewis acid and trichloromethane are added with a chloromethylation reagent dropwise for thermostatic reaction, and chloromethylation tetraphenylporphyrin is obtained after treatment; the chloromethylation tetraphenylporphyrin is dissolved into DMF, themixture is added with silica gel for temperature reaction, and the silica gel supported porphyrin is obtained after treatment; and the silica gel supported porphyrin is dissolved into the DMF, the mixture is subjected to temperature rise and added with metal salt or oxide for reaction, and the silica gel supported metalloporphyrin compound is obtained after treatment. The application method comprises that: phenylethane and the silica gel supported metalloporphyrin compound are introduced with O2 for the temperature reaction, and a main product hypnone is obtained after treatment. The inventionhas the advantages that: the reaction is easier, and the supported degree of the porphyrin is high; and in the application, the activity of a catalyst is effectively protected, the activities of thecatalyst are promoted, and the yield and the selectivity of the main product are improved.

The invention provides a method for modifying a three-dimensional graphene confinement high-volume hydrogen-storage material by an iron-based catalyst. The method comprises the following steps: respectively dissolving ferric nitrate or partial other metal-added nitrate and polyvinylpyrrolidone in deionized water to prepare a mixed solution, placing the mixed solution in an air-blast drying box forcomplete drying, grinding the material to powder, and transferring the ground powder to a tubular furnace for primary pre-burning or secondary heat treatment to obtain a black foamed product which isthe iron-based catalyst modified three-dimensional graphene confinement high-volume hydrogen-storage material; and compositing the iron-based catalyst modified three-dimensional graphene and a hydrogen-storage alloy to obtain the modified three-dimensional grapheme confinement high-volume hydrogen-storage material. A series of the iron-based catalyst modified three-dimensional graphene confinement high-volume hydrogen-storage materials can be prepared by controlling the reaction conditions, the method is novel, the production period is short, the cost is low, and the hydrogen-storage materialhas the advantages of strong repeatability and large-scale preparation, and has good industrial prospect on the field of hydrogen storage.