61results about How to "Achieve green synthesis" patented technology

The invention discloses a preparation method of medium-chain polyglycerol fatty acid ester. The method uses camphor tree seed oil as a raw material and comprises the following steps: hydrolyzing the degummed and dewatered camphor tree seed oil, and performing saponification and acidification treatment; placing the separated medium-chain fatty acid ester and different polymerization degrees of polyglycerol in an esterification reactor, then adding a defined amount of a solid base KOH / Al2O3 catalyst, injecting nitrogen for protection, and heating and stirring to perform an esterification reaction; adding the obtained medium-chain polyglycerol fatty acid ester in a deacidification reactor for reacting to obtain medium-chain polyglycerol fatty acid ester of which yield is 95%; and placing thedeacidified medium-chain polyglycerol fatty acid ester in a dewatering decolorizer to obtain medium-chain polyglycerol fatty acid ester of which yield is 98%. According to the invention, the solid base KOH / Al2O3 catalyst is used as the esterification catalyst to synthesize medium-chain polyglycerol fatty acid ester, the solid base catalyst is easy in separation and can be reused, the solid waste emission is low and the green synthesis of polyglycerol ester is realized.

The invention relates to a soluble chiral diamino derivative, use and a preparation thereof, belongs to the organic chemistry field. A water-soluble chiral diamine-pure optical N-monosulfonated acylation-1,2-2-(2'-amino-phenyl)-1,2-ethylenediamine and its derivative or its salt, their uses and productions are disclosed. It's fast, simple, no need for other organic solvents or additives and has better effect than organic phase. Complex formed of the soluble chiral diamine and metal can be used for ketone and imine asymmetric catalytic hydrogenating reduction in aqueous phase.

The present invention discloses process of synthesizing exo-tricyclo[5.2.1.02, 6] decane, and aims at solving the technological problem of raising reaction conversion rate and yield and separating product from by product effectively. The process includes the following steps: adding chloroaluminic acid ionic liquid in a reactor, adding bridge-tricyclo[5.2.1.02, 6] decane material to react at 5-100 deg.c for 20 min to 2 hr, letting the reactant liquid stand and separating exo-tricyclo[5.2.1.02, 6] decane. The molar ratio between the chloroaluminic acid ionic liquid and bridge-tricyclo[5.2.1.02, 6] decane is 0.5-5, and the chloroaluminic acid ionic liquid is alkyl imidazole halide-aluminum trichloride or alkyl pyridine halide-aluminum trichloride. The present invention is applied mainly in synthesizing exo-tricyclo[5.2.1.02, 6] decane.

The invention relates to an opoka-base carbon composite material and a preparation method thereof. The preparation method comprises the following steps: properly pretreating the opoka, proportionally mixing with a biomass water solution, and preparing the opoka-base carbon composite material by a nonhomogeneous hydrothermal synthesis process. The method maintains the abundant pore structure of the opoka, and fully utilizes the particular surface electric field of the opoka to implement the firm compounding of the mineral base and carbon material. The obtained composite material has excellent functions of adsorption, filtration aiding and heat insulation. Compared with the single opoka or hydrothermal carbon microspheres, the composite material has higher adsorption capacity, can be widely used in purifying air and water, and is especially used for treating pollutants in water bodies. The silicon-carbon composite material obtained after reduction can also be used as a battery high-performance negative pole material. The raw material is the cheap and accessible natural mineral with abundant resources and low production cost. The preparation method has the advantages of simple preparation technique, no need of other catalysts, low reaction temperature and environment friendliness.

The invention relates to a fuel cell catalyst technology, and aims to provide preparation and application of a monatomic platinum catalyst based on a platinum coordination cyclodextrin inclusion compound. The preparation method comprises the following steps of: dissolving [beta]-cyclodextrin in deionized water, then mixing the [beta]-cyclodextrin with a melamine solution, and performing dispersing; performing vacuum drying to obtain a melamine cyclodextrin inclusion compound; taking the melamine cyclodextrin inclusion compound, adding the melamine cyclodextrin inclusion compound into the potassium chloroplatinate solution, and performing stirring to obtain a platinum coordination melamine cyclodextrin inclusion compound solution; then adding sodium metaborate tetrahydrate, and after the sodium metaborate tetrahydrate is completely dissolved, carrying out spray drying to obtain a precursor; carbonizing the precursor under the protection of a nitrogen atmosphere; and performing cooling,washing and drying to obtain a monatomic platinum catalyst. The preparation and application of a monatomic platinum catalyst based on a platinum coordination cyclodextrin inclusion compound are simplein technical route, have universality, and can avoid generation of impure phases. Platinum atoms are fixed by utilizing the strong coordination effect of nitrogen to form a monatomic catalyst, so that the monatomic catalyst has the higher electrocatalytic activity, and the cost of the fuel cell catalyst can be effectively reduced.

A kind of synthetic method of N-ethyl carbazole relates to N-ethyl carbazole. In N-methylpyrrolidone solvent, carbazole and proton-removing agent are carried out salt-forming reaction, generate carbazole salt, after continuing to pass through acetylene reaction, obtain N-vinyl carbazole; In the N-vinyl carbazole of generation In an organic solvent, a Pd catalyst is added, and a hydrogenation reaction is carried out in an auxiliary agent to obtain N-ethylcarbazole. A series of special catalysts are optimized, and the green synthesis of N-ethylcarbazole can be effectively realized through the catalytic hydrogenation process, and the emission of three wastes can be reduced. During the hydrogenation process, the catalyst can be reused to reduce the cost. The N-ethylcarbazole product prepared by the hydrogenation process is of higher quality. It does not require the participation of traditional alkylation reagents (diethyl sulfate, ethyl carbonate, haloethane, etc.) and toxic organic solvents, and there is no problem of waste liquid discharge. It is a truly green and clean production process.

The invention relates to a soluble chiral diamino derivative, use and a preparation thereof, belongs to the organic chemistry field. A water-soluble chiral diamine-pure optical N-monosulfonated acylation-1,2-2-(2'-amino-phenyl)-1,2-ethylenediamine and its derivative or its salt, their uses and productions are disclosed. It's fast, simple, no need for other organic solvents or additives and has better effect than organic phase. Complex formed of the soluble chiral diamine and metal can be used for ketone and imine asymmetric catalytic hydrogenating reduction in aqueous phase.

The invention discloses a method for synthesizing precious metal nano-particles with extracellular polysaccharide obtained by fermenting lactobacillus plantarum. The lactobacillus plantarum extracellular polysaccharide and a precious metal solution are used as raw materials, and the precious metal nano-particles can be obtained by means of reacting. The synthesized precious metal nano-particles are uniform in grain size and good in dispersity. In addition, the method is short in reaction time and low in energy consumption, no chemical reagent needs to be added, and green synthesis of the precious metal nano-particles is realized.

The invention discloses a preparation method of a dendritic hollow zinc oxide nanorod array, and belongs to the technical field of material science and engineering. The method comprises the followingsteps: carrying out surface treatment on a zinc sheet; performing compression molding; conducting unloading; performing demolding; and standing in an alkaline solution. According to the method, high-temperature and high-pressure conditions of a traditional hydrothermal method are not needed, meanwhile, use of any organic additive is avoided, and in addition, an additional zinc source is not introduced in the synthesis process. According to the method, the dendritic hollow zinc oxide nanorod array with good crystallinity and controllable morphology is prepared by utilizing a soaking method under the conditions of low temperature and normal pressure. The method has the advantages of simplicity in operation, low cost, environmental friendliness and the like, is expected to realize large-scalecontrollable preparation of the dendritic hollow zinc oxide nanorod array, and has important and profound significance for revealing the growth principle of zinc oxide and promoting the practical application of zinc oxide.

The invention relates to a method for synthesizing cefprozil through an enzymatic method. According to the method, a cefprozil parent nucleus, D-para hydroxybenzene glycine methyl ester and / or D-para hydroxybenzene glycine ethyl ester, water and penicillin acylase react at the temperature of 10 DEG C-25 DEG C to obtain a crude cefprozil product and enzyme reaction mother liquor, the temperature is controlled to be 0 DEG C-15 DEG C, a pH value is controlled to be 0.2-0.8, N,N-dimethyl formamide is added, the mixture is stirred uniformly, a seed crystal is added for crystal growing, the pH value is adjusted to be 5.5-6.5, and the temperature is controlled to be 10 DEG C-30 DEG C to obtain a cefprozil N,N-dimethyl formamide compound; the temperature is controlled to be 0 DEG C-25 DEG C, water and the cefprozil N,N-dimethyl formamide compound are added into a reactor, the mixture is stirred for crystal transformation for 1-4.5 h, and then filtering, washing, swabbing-off and drying are carried out to obtain a finished cefprozil product. The cefprozil is high in product yield and high in purity, appearance is white, the preparing method is simple and easy to implement, the condition is mild, and the method is more suitable for industrial production.