36results about How to "Meet the requirements of green chemical development" patented technology

The invention relates to an environment-friendly technology for preparing ketoleucine calcium in an aqueous phase. Isobutylidene hydantoin and a calcium chloride aqueous solution serve as raw materials, and water serves as a solvent. The environment-friendly technology comprises the steps that heating reflux hydrolysis is carried out on the isobutylidene hydantoin in water and industrial liquid alkali, the calcium chloride aqueous solution is dropwise added, the mixed solution is filtered, filtered liquid is collected and cooled, hydrochloric acid acidification is carried out, vacuum nitrogen displacement is carried out, caustic soda liquid is added for alkalization, cooling is carried out, the calcium chloride aqueous solution is dropwise added, calcium salt is obtained, cooling is carried out, a crude product is obtained through filtering, the crude product is refined in purification water, and a ketoleucine calcium refined product is obtained. The environment-friendly technology for preparing the ketoleucine calcium in the aqueous phase has the advantages of being easy to operate, simple in steps, high in yield coefficient, good in product quality, environmentally friendly and the like. According to the environment-friendly technology for preparing the ketoleucine calcium in the aqueous phase, the environment-friendly water is adopted as the solvent completely, the requirement of green chemistry development is met, the pollution problem is solved from the source, and the environment-friendly technology is suitable for industrialized mass production.

The invention discloses a method for synthesizing an aromatic primary amine in a circulating water phase system. According to the method, an aryl halide and ammonia water are taken as raw materials, water is taken as a solvent, a carbonate, a fluoride, a phosphate or a hydroxide of an alkali metal or an alkaline-earth metal or a compound which can be converted to a corresponding alkali in water is taken as the alkali, polyamine carboxylic acid and a salt type compound thereof are taken as ligands, and a copper source catalyst is adopted for catalyzing the formation of the aromatic primary amine from the aryl halide and the ammonia water. According to the method disclosed by the invention, the water is used as the solvent, any phase transfer of the catalyst is not required, and the catalyst, the ligands and the reaction solvent, namely the water, can be recycled, so that the environment-friendly property of reaction is effectively improved, the method is more in line with requirements of green chemical development, a substrate particularly has a wide range of applications, and the method further has broad prospects in the aspects of preparation of natural products, medicaments and pesticides.

The invention relates to a methyIsuIfino benzaldehyde preparation method mainly comprising the steps of: (1) smelting; (2) preheating; (3) chemical oxidation; (4) solid-liquid separation; (5) alkali washing; (6) solid-liquid separation; (7) alcohol washing; (8) solid-liquid separation; (9) drying; and (10) electrochemical oxidation. The process provided by the invention is reasonable, the preparation method is simple, production cost is low, product purity is high, and the process is safe. The method is suitable for realizing large-scale industrialization. The process is a clean production process of methyIsuIfino benzaldehyde preparation. The process satisfies the requirement of green chemical engineering development.

The invention relates to a preparation method of p-methylsulfonylbenzoic acid. The method provided by the invention mainly comprises the following steps: (1) fusing; (2) preheating; (3) chemical oxidation; (4) solid-liquid separation; (5) neutralization for salt formation; (6) solid-liquid separation; (7) adsorption for removal of impurities; (8) solid-liquid separation; (9) acidification and crystallization; (10) solid-liquid separation; (11) washing; (12) dewatering and drying for obtaining a product p-methylsulfonylbenzoic acid; and (13) electrochemical oxidation. The preparation method provided by the invention is simple, has advantages of reasonable technology, low production cost, high product purity and safe process, is convenient to realize large-scale industrialization, and is a clean production technology which is used for preparing p-methylsulfonylbenzoic acid and accords with green chemical development requirements.

The invention provides a semi-solid slurry pulping device comprising a rotor mixer (1) and a pulping tank (2). The rotor mixer (1) comprises a mixing drum (9) and a rotor mixing rod (4) extending fromthe mixing drum (9) to the interior of the pulping tank (2), and the mixing drum (9) is internally provided with a driving device used for driving the rotor mixing rod (4) to rotate by itself. The end face, facing the pulping tank (2), of the mixing drum (9) is provided with a transmission gear (6), the rotor mixing rod (4) is connected with the transmission gear (6) in an engaged manner, the transmission gear (6) is provided with n teeth, the spacing between the adjacent front and rear teeth is a, and the tooth width of each tooth is b; and the end, connected with the transmission gear (6),of at least one rotor mixing rod (4) is provided with engaged teeth matched with the transmission gear (6), each rotor mixing rod (4) comprises m engaged teeth, the spacing between the adjacent frontand rear engaged teeth is b, and the tooth width of each engaged tooth is a.

The invention discloses a synthesizing method of phthaloyl-beta-alanine. In the synthesizing method, the phthaloyl-beta-alanine is prepared through grinding and microwave irradiation by taking beta-alanine and phthalic anhydride as raw materials and sodium carbonate and sodium chloride as mineralizers. The synthesizing method has the advantages of high selectivity, thorough reaction, high yield, low energy consumption, little pollution, suitability for industrial production and wide prospect.

The invention relates to a method for leaching and separating a solid mixture of sodium phenolate and sodium hydroxide by taking an acetone-water mixed solvent as a leaching agent and separating and refining phenol through leaching-phase separation-rectification coupling, and sodium hydroxide and the leaching agent are recycled while phenol is obtained through separation and refining. The separation method provided by the invention fully utilizes the characteristics of the separated substance system and the characteristics of the separation process, is simple and feasible in separation operation, low in operation cost and high in valuable component utilization rate, and is a clean production method meeting the development requirements of green chemical industry.

The invention discloses a method of preparing a 3-amino-2-thiocyano-alpha, beta-unsaturated compound. The preparation method comprises the following steps of adding activated ketone, ammonium thiocyanate and dye fluorescein in acetonitrile as a solvent, performing driven reaction for 6-12h with visible light at the temperature of 25 DEG C, performing spin drying on reaction liquid to obtain a concentrate, and performing silica gel column chromatography on the concentrate to obtain a target compound. The method has the advantages of no use of additional oxidizing agent, low preparation cost, no toxic and side products emission and accords with the requirement for green chemical engineering development.

The invention relates to a spinning glue-making method by dissolving animal hair and vinylon with an ionic liquid, which comprises the following steps: cleaning the animal hair with water, soaking with ethanol or acetone to degrease for 1-12 hours, drying at 60-90 DEG C, crushing into fine powder by a crusher, adding the treated animal hair and polyvinyl butyral into a container filled with the ionic liquid, and uniformly stirring to obtain the spinning glue-making method. The preparation method comprises the following steps: dissolving keratin in an oil bath at 120 DEG C until a transparent glue solution is formed to obtain a keratin solution, and then defoaming the keratin solution in a vacuum environment of-0.95 MPa to obtain a spinning glue solution after vacuum defoaming; according to the method, keratin and vinylon can be dissolved in a green and efficient mode, degradation of the keratin is controlled to obtain regenerated keratin with large molecular weight, the strength of keratin spinning is greatly improved, keratin molecules are made into filaments independently, the application range of the keratin spinning is widened, meanwhile, pollution to the environment is avoided, and the method is suitable for industrial production. The requirements of modern green chemical development are met.