9results about How to "Meet the requirements of green chemistry" patented technology

The invention relates to the technical field of electrolyte, in particular to a thioether cross-linked solid polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: taking N, N-dimethylformamide, respectively adding 3, 6-dioxa-1, 8-octane dithiol and triglycidyl isocyanurate, and uniformly stirring to obtain a mixed solution; adding bis (trifluoromethylsulfonyl) imide lithium into the mixed solution, putting magnetons on a magnetic stirrer, and completely dissolving the magnetons to obtain a precursor solution; and pouring a proper amount of the precursor solution into a polytetrafluoroethylene mold, spreading, and carrying out cross-linking polymerization in a blast oven to form the film. The three-dimensional thioether cross-linked network structure has a large number of weakly coordinated thioether groups, dissociation of lithium salt can be promoted, a large number of free Li < + > is generated, the number of Li < + > is increased, meanwhile, the crystallinity of a polymer is remarkably reduced, the ionic conductivity is improved, the mechanical stability of a film can be improved, and the service life of a battery is effectively prolonged.

This invention belongs to the field of heterogeneous catalyst technology. It provides a single-atom nitrogen-doped carbon catalyst, its preparation, and its application. Ammonium metavanadate is dissolved in hot water, melamine is added to the resulting solution, and the mixture is stirred until the water evaporates to obtain a powder. The powder is collected, ground to a particle size of less than or equal to 50 micrometers, and calcined to obtain a nitrogen-doped carbon material (VN@NC support). The nitrogen-doped carbon material is weighed and dispersed in methanol and / or an aqueous solution, a metal salt aqueous solution is added, and the dispersion is stirred at room temperature and then centrifuged and dried. The resulting solid is pyrolyzed for 1-5 hours to obtain the single-atom nitrogen-doped carbon catalyst. This invention solves the problems of unsafe storage and transportation of peroxides and low reaction selectivity in organic peroxide oxidation methods. This catalyst exhibits high activity, high selectivity, and good stability, and can be used for efficient catalysis of cyclohexene epoxidation to prepare cyclohexane oxide under mild reaction conditions.

This invention discloses a method for preparing deuterated 1,2-dibromoethane, comprising the following steps: (1) adding tetradeuterium glycol, N-bromosuccinimide, and solvent into a reaction vessel; (2) controlling the temperature inside the reaction vessel at -5 to 20°C, and then adding a mixture of triphenylphosphine and solvent dropwise into the reaction vessel; (3) after the dropwise addition is completed, restoring the reaction vessel to room temperature, and controlling the reaction time to 0.5 to 1.5 h to obtain a product containing deuterated 1,2-dibromoethane. The reaction temperature of this invention is at room temperature, the reaction operation is simple, it meets the requirements of green chemistry, and it can be industrialized. Furthermore, the purity of deuterated 1,2-dibromoethane is above 98 wt%, and the yield of deuterated 1,2-dibromoethane is above 60 wt%.

The invention discloses a method for preparing quinone compounds through direct oxidation of phenol by using oxygen as an oxidizing agent under the catalysis of copper. According to the method, under the condition of room temperature, in an organic solvent, copper chloride dihydrate (CuCl2. 2H2O) and nitrogen oxide are used as catalysts, oxygen is used as an oxidizing agent, and phenol is directly oxidized to generate the quinones compounds. The method has the advantages of simple and safe operation, cheap and easily available catalyst and raw materials, mild reaction conditions, excellent yield, good compatibility of substrate functional groups, environment-friendly reaction process, meeting of green chemical requirements and the like, and has industrial application prospects.

The application belongs to the technical field of nanomaterials, and particularly relates to a hollow porous silica hydrophobic microsphere and a preparation method and application thereof. The preparation method comprises the following steps: mixing a hard template and anhydrous ethanol by ultrasonic dispersion to obtain a hard template dispersion liquid; adding the hard template dispersion liquid into a solvent to stir and adding ammonia water under the stirring state, then adding a soft template to continue stirring to obtain a mixed liquid; adding a hole expanding agent to the mixed liquid, then dropwise adding tetraethyl orthosilicate to continue stirring to carry out a reaction to obtain a product; performing centrifugation, washing, drying and calcination treatment on the product to obtain a calcined product; and performing water bath heating reaction on the calcined product and organosiloxane to obtain the hollow porous silica hydrophobic microsphere. The hollow porous silica hydrophobic microsphere has a simple preparation method, mild conditions, no toxicity and harmlessness, and common materials are used as raw materials, and the material can be used for water pollutant adsorption.

The present application relates to electromagnetic wave absorption technical field, especially to a kind of carbon nanometer load cobalt ferrite composite wave-absorbing material and preparation method thereof, comprising the following steps: 1) soluble iron salt, soluble cobalt salt is dispersed in water, and complexing agent is added, and cobalt ferrite powder is obtained by sol-gel reaction;2) soluble biomass saccharide is dispersed in deionized water, and a solution with a certain concentration is prepared, cobalt ferrite powder is added to the solution for aging immersion, and then the solid-liquid mixture is suction filtered, the filter cake is air dried, and the cobalt ferrite powder with uniform carbon source loading is obtained;3) the cobalt ferrite powder with carbon source loading is calcined under inert atmosphere, and the composite wave-absorbing material is prepared.The wave-absorbing material prepared by the present application has the characteristics of light weight, strong absorption, effective absorption bandwidth, easy-to-control wave-absorbing performance, etc.In addition, the preparation method used in the present application is simple, raw materials are easy to obtain, cost is low, green and environmentally friendly, and more conducive to industrial application.

This invention belongs to the field of pesticide technical preparation technology, specifically providing a purification method for difenoconazole. The first step involves dissolving crude difenoconazole containing isomers in a first organic solvent and heating to a clear solution, then adding a copper chloride methanol solution to react and generate difenoconazole copper salt. The second step involves reducing the difenoconazole copper salt obtained in the first step in a second organic solvent using liquid alkali, then separating the difenoconazole oil and filter cake. The separated filter cake is adjusted with dilute hydrochloric acid to obtain copper chloride. The third step involves the preparation of pure difenoconazole: dissolving the difenoconazole oil obtained in the second step in a polar solvent, then adding n-hexane, n-heptane, or methyl tert-butyl ether dropwise, and recrystallizing to obtain pure difenoconazole solid. Compared with existing technologies, this method overcomes the defects of existing technologies such as strong acid corrosion, difficulty in recovering metal salts, and incomplete impurity removal, and achieves higher purity.

This invention provides a green preparation method and application for bioactive glass. The preparation method of this invention does not generate nitrogen oxide gases, uses readily available calcium sources, has a simple preparation process with high raw material utilization, and produces no toxic or harmful gases during the preparation process, meeting the requirements of green chemistry. The bioactive glass prepared by this invention exhibits good bioactivity and is preferably used for bone repair, bone wound healing, and periodontal tissue repair.

The invention belongs to the technical field of organic synthesis, and particularly relates to a synthesis method of diphenylguanidine chromate. The method comprises the following steps: taking N, N '-diphenylthiourea and ammonia water as raw materials, and directly synthesizing the diphenylguanidine chromate through one-step reaction in a closed reactor by virtue of a multifunctional synergistic catalyst. The preparation method has the advantages that the tedious processes of oxidation, nucleophilic addition and salification multi-step separation in the traditional preparation process are thoroughly abandoned through a one-step synthesis process, and the storage, transfer and purification cost of an intermediate product is avoided.