摘要
关于α，β－双－［５－甲基苯骈恶唑－（２）－］乙烯生产过程中反应终点的判定和催化脱水的效率问题，一是改用二甲苯作反应介质，使反应体系生成的水与二甲苯形成共沸物，通过计量反应中释出的水量来解决反应终点的判定问题；二是采用硼酸和对甲苯磺酸共用的催化体系，观察其催化脱水的协同效应。
The end point of the reaction between 2 - amino - 4 - methylphenol and malic acid to form a, B - Bis - [5-methylbenzoxazolyl- (2)- ] ethylene was decided by weighing the quantity of the water liberated horn the reaction system, and the combination effect of catalytic dehydration in fore reaction system was also observed.
出处
《上海化工》
CAS
2000年第5期22-23,共2页
Shanghai Chemical Industry
关键词
荧光增白剂
催化脱水
生产工艺
染料
Brighten agent
a, B - Bis - [5 - methylbenzoxazolyl - (2) -] ethylene
Catalytic dehydration
Combination effect
