维生素C催化合成阿司匹林的条件研究--(制剂与技术) 关键词] 维生素C;合成条件;阿司匹林;研究 [gap=725]Key words] Vitamin C; Synthesis condition; Aspirin; Research
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best synthesis condition 最佳制备条件
optimum synthesis condition 最佳合成条件
Come through the test, the best synthesis condition of decoloration flocculant is: the temperature is 70～80℃, the time is 3.5 hour, a variety of materials ratio is n(dicyandiamide):n(formaldehyde):n(ammonium chloride):n(urea):n(sodium nitrite) is 1:2.4:0.7:0.1:0.05, modifier ammonium chloride as a additional batches.
通过试验得出脱色絮凝剂的最佳合成条件是:反应温度70℃～80℃,反应时间3.5h左右,反应各种原料摩尔比为n(双氰胺):n(甲醛):n(氯化铵):n(尿素):n(亚硝酸钠)为1:2.4:0.7:0.1:0.05,改性剂氯化铵为分批投加。
参考来源 - T型高效脱色絮凝剂的制备及处理染料废水的应用研究Conclusion: The method is feasible, and the synthesis condition needs to be improved.
结论:本方法可行, 合成条件需进一步完善。
参考来源 - 维生素C催化合成阿司匹林的条件研究—《中国医药导报》—2009年第21期—龙源期刊网·2,447,543篇论文数据，部分数据来源于NoteExpress
Under the optimum synthesis condition, the esterification yield were over 98%.
在最佳反应条件下，酯化率可达98%以上。
The results show that the yield of ethofumesate was 79.2% in the optimum synthesis condition.
通过实验，找到了较佳的合成条件，平均得率为79.2 %。
The synthesis condition of gelling agent phosphate ester in oil base fracturing fluid is studied on this paper.
探讨了油基压裂液胶凝剂磷酸酯的合成条件，进而对配制的压裂液性能进行了评价。
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