3results about How to "Achieve dissociation" patented technology

This invention relates to the field of carbon nanotube technology, specifically disclosing a high-viscosity carbon nanotube conductive paste and its preparation method. The raw materials for this high-viscosity carbon nanotube conductive paste include ultra-long single-walled carbon nanotubes, short-cut multi-walled carbon nanotubes, conductive carbon black, carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, polyacrylic acid, fluorinated silane coupling agent, γ-butyrolactone, and N-methylpyrrolidone. The high-viscosity carbon nanotube conductive paste provided by this invention achieves uniform dispersion, low volume resistivity, excellent anti-settling properties, and good coating processability of the carbon nanotube conductive paste under high solids content through the synergistic effect of the carboxyl-terminated hyperbranched polyester-polyethylene glycol block copolymer, the fluorinated silane coupling agent, and polyacrylic acid, combined with multi-stage grinding and high-pressure homogenization processes.

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 belongs to the field of acyclic compound technology, specifically relating to a method for preparing tert-butyl peroxide. An alkaline solution is added to acetic anhydride, and the mixture is stirred to obtain a reaction solution. A composite catalyst is added to a purified tert-butyl hydrogen peroxide solution, and the mixture is stirred to obtain a mixture. The reaction solution is added to the mixture, and the mixture is stirred to obtain an organic phase. The organic phase is acid-washed to obtain an oil phase. The oil phase is then alkali-washed, salt-washed, and freeze-dried to obtain tert-butyl peroxide. This invention purifies the tert-butyl hydrogen peroxide solution, effectively removing di-tert-butyl peroxide impurities. A composite catalyst composed of p-toluenesulfonic acid, perfluorosulfonic acid resin, and sulfonated carbon is used as the catalyst, reducing the destructive effect on the product tert-butyl peroxide and significantly improving the yield of tert-butyl peroxide, thus possessing industrial production significance.