30results about How to "Generate none" patented technology

The invention belongs to the field of catalysts, and in particular relates to a catalyst with hydrogen storage performance and a preparation method and application thereof. The catalyst with hydrogen storage performance includes the following components: a metal hydrogen storage material and a metal boride; the mass ratio of the metal hydrogen storage material to the metal boride is 10-5:1. The catalyst of the present application and gaseous H 2 Reversible reactions occur to form metal solid solutions and metal hydrides. When the hydrogen molecule contacts the surface of the alloy, it is first adsorbed on the surface of the alloy molecule, and then the H-H bond dissociates to become hydrogen in the atomic state. The hydrogen in the atomic state reduces the hexafluoroacetone to hexafluoroisopropanol under the action of the hydrogenation catalyst. . The catalyst of the invention can be reacted under mild conditions, and has low requirements for reaction equipment; the catalyst of the invention has high catalytic activity and high selectivity, and almost no by-products are generated.

The invention discloses a lanthanide rare earth ion doped bismuth titanate monocrystal thin slice and a preparation method thereof. The lanthanide rare earth ion doped bismuth titanate monocrystal thin slice is 5-10 microns in length and 50-200nm in thickness. The preparation method comprises the following steps of: 1, preparing a lanthanide rare earth ion doped bismuth titanate precursor solution by adopting ethylene glycol monomethyl ether as a solvent according to an element molar ratio of Bi:R:Ti=(4-x):x:3 in a formula Bi4-xRxTi3O12 (R is a lanthanide rare earth element, and x is more than 0 and is less than or equal to 1.5); 2, adding an NaOH aqueous solution into the precursor solution, and then filtering to obtain a deposit; and 3, uniformly stirring the deposit, heating the deposit in a reaction kettle, and cleaning and drying a product after reaction to obtain the lanthanide rare earth ion doped bismuth titanate monocrystal thin slice. According to the preparation method, an organic solvent is used as a main reaction medium, and a hydrolysis reaction caused by a lot of water is effectively avoided, so that the generation of an impurity phase is avoided. The lanthanide rare earth ion doped bismuth titanate monocrystal thin slice prepared by the preparation method is large in size and high in purity without the generation of the impurity phase.

The invention discloses a preparation method for water-soluble natural vitamin E. the method comprises the steps that chloromethylated polystyrene resin and PEG1000 serve as raw materials, alkali serves as a catalyst, and reaction is carried out in an organic solvent at 45-135 DEG C so as to obtain PEG1000-loaded resin; under the action of the catalyst, 4-dimethylaminopyridine (DMAP) and tetrahydrofuran, water division reflux reaction is carried out on the PEG1000-loaded resin and d-alpha-tocopherol succinate so as to obtain TPGS-loaded resin; and after the TPGS-loaded resin is soaked by usingmethylbenzene, ethanol, palladium carbon and pyridoxal phosphate are added, and under the atmosphere of 0.8-1.5 MPa of hydrogen , stirring is carried out for reaction for 24 hours at the temperatureof 100-110 DEG C so as to obtain d-alpha-tocopherol polyethylene glycol succinate. According to the synthetic method, the yield of TPGS can reach 97.8%, the TPGS monoester content is 98.6%, and the TPGS diester content is 0.

The invention discloses a synthetic method of N-(2-benzimidazolyl)-methyl carbamate. The method comprises the steps of by taking hydrogen cyanamide, methylclhlorofonmate and o-phenylenediamine as materials, adding strong alkali and weak acid salt in synthetic process; adding the strong alkali and weak acid salt to control the pH value of a reaction system in the reaction process, achieving the target of feeding once to control the pH of two-step reaction by the buffer effect, wherein the strong alkali and weak acid salt can be combined with and consume hydrogen chloride generated in the first step of reaction to counteract ammonia generated in the second step of reaction. The synthetic method is simple to operate, high in yield, and environment-friendly; the cost of acid-base is reduced; generation of impurities in reaction is reduced; and no waste water or residue is generated.

The invention discloses a method of using a microchannel reactor to prepare polyether glycol. Active hydrides are used as the initiator. Alkene oxide is used as the raw material. Bi-metal cyanide is used as the catalyst. The synthesis reaction process of the polyether glycol with the number-average molecular weight of 700-1000 is completed in the micro-channel reactor. The polyether glycol product prepared by using the method has a relatively narrow distribution of molecular weights, the degree of unsaturation of the product is low, and no tailing peak is generated.

The invention provides a process for preparing trans-1,2-naphthenic diol through direct synthesis of epoxy cycloalkane and water. The method comprises the following steps: putting epoxy cycloalkane and water in a reaction tank according to a mol ratio of epoxy cycloalkane to water of 1: 4-20, closing the reaction tank, heating an obtained mixture to a temperature of 100 to 140 DEG C under stirring and subjecting the mixture to a reaction for 2 to 10 h; drying liquid through vacuum concentration and evaporation so as to obtain the product of trans-1,2-naphthenic diol. According to the invention, a reaction speed is fast, no other catalyst is needed, and selectivity and yield of the product is high, higher than 99%; the reaction can be carried out in one reactor, and it is not needed to separate a catalyst, thereby simplifying and facilitating operation; a resultant polymer is oligomer which undergoes quick hydrolysis under the catalysis of high-temperature water to produce trans-1,2-naphthenic diol.