50results about How to "The synthesis process steps are simple" patented technology

The invention discloses an amine-modified fibrous emergent absorbing material and a preparation method thereof and belongs to the field of synthesis and application of environmental materials. According to the invention, an artificially-synthesized high molecular material is adopted as a matrix, and the amine-modified fibrous emergent absorbing material is prepared by graft polymerization and amination reaction; and the basic structural formula is shown in the specification; the average diameter of the amine-modified fibrous emergent absorbing material is 40-60mum, and the content of amino groups is 5-8mmol / g. The synthesis method is simple, raw materials are low in prices, and the prepared fibrous emergent absorbing material is large in toughness and high in mechanical strength, has a high-hydrophilicity surface, and can remove multiple heavy metal ions in water fast and efficiently by virtue of the action of surface groups; and the balanced absorption time for the heavy metal ions such as nickel, copper, lead and the like is only about 10 minutes, and the absorbed fiber is easy to recover and can be used repeatedly after regeneration. The amine-modified fibrous emergent absorbing material disclosed by the invention is especially applicable to emergent disposal for unexpected heavy-metal water pollution events occurring to natural water bodies such as river channels and lakes and the like.

The invention discloses a producing method for hydrogenated terpinene malaic anhydride glycidyl ester type epoxy resin;epoxy resin of glycidyl ester, including following steps: first, mixing the hydrogenated terpinene malaic anhydride, epoxy chloro propane and water for a reaction in an azeotropic reflux stage for 0.5-3 hours, adding catalyst and reacting for 0.5-5hours; second, cooling above reactant down to less than 50 DEG C, adding alkali 8 to 12 times, reacting for 0.5-8 hours at 30-90 DEG C, washing by hot water to neutrality, lamination after laying aside, removing water layer, then reduced pressure distillation, removing excessive chloroepoxy propane, getting the product. Wherein, in the first step, the reaction temperature of the reflex stage is 90-120 DEG C, and the catalyst is quaternary ammonium with a dose 0.1%-3% of HTMA mass. In the third step, the alkali is solid or 20-50% water solution by mass concentration of sodium hydroxide or potassium hydroxide with a dose of 1-4 times of HTMA molar quantitiy. The reaction material has a excessive chloroepoxy propane and has no other solvent in the reaction.

The invention discloses a preparation method of CBZ-valganciclovir, and belongs to the field of preparation of valganciclovir. The preparation method includes the following steps: feeding a starting material in a reactor and carrying out condensation reaction; evaporating to remove a catalyst and a first solvent; adding a second solvent and carrying out hydrolysis; evaporating to remove the second solvent, adding water for making a solution to be clear, decolorizing and filtering, crystallizing, and centrifugally drying to obtain a crude product of ganciclovir; and placing the crude product of the ganciclovir and a third solvent in a reactor and heating and stirring, cooling and filter-pressing to obtain a first filter cake and first filtrate, and directly synthesizing the valganciclovir by using the first filtrate. By the preparation method of the CBZ-valganciclovir, ganciclovir condensation compound isomer is treated effectively, furthermore, the CBZ valganciclovir is synthesized directly in the filtrate synthesized by the 9-bit ganciclovir, a 'one-pot' type preparation technology is adopted, steps of a synthesis technology of the CBZ valganciclovir are simplified, residual raw materials are reduced, production cost is reduced, synthesis quality of the CBZ valganciclovir is improved, production efficiency is high, and the CBZ-valganciclovir is suitable for being industrially produced in a large scale.

The present invention relates to a preparation method of an organic compound, in particular to a method used for synthesizing 2, 3, 4, 5-tetrahydro-1H-1, 4-benzodiazepine. The raw materials of o-halogen benzyl halogen and ethylene have mixing reaction in an organic solvent; the intermediate product of N-(2-benzyl) ethylene diamine can be prepared after separation and purification; then the intermediate product is dissolved in the system of ring-closing agents; under the condition with a catalyst, the final product can be prepared through ring-closing reaction. Compared with the synthetic method in the prior art, the preparation method of the 2, 3, 4, 5-tetrahydro-1H-1, 4-benzodiazepine has the significant advantages of simple synthetic process, wide range of technical conditions, safe andeasy operation, environmentally friendly operation, cheap and easily available raw materials, great decrease of the production cost, high yield of the final product, high purity of the product, and broader application prospects.