中文翻译与英英解释
例句与用法 | 1. | Manufacturer of phase transfer catalysts and organic quaternary ammonium compounds , located in india . other products include quaternary phosphonium compounds , pyridinium salts , and methylating and brominating agents
-专业生产氟化苯甲酸系列医药中间体,如对氟苯甲酸间氟苯甲酸间溴苯甲酸2 -氯- 4 -氟苯甲酸2 -硝基- 4 -氟苯甲酸3 ， 5 -二氟苯甲酸等。
| | 2. | New developments of polycarboxylic acid derivative catalysts , ion exchange resin catalysts , macrocyclic chelating compound catalysts , quaternary phosphonium salt catalysts , heterogeneous hydrotalcite - type catalysts and other catalysts which to be used in ethylene oxide catalytic hydration , and the catalysts of synthesis method of ethylene glycol via preparation and reaction of ethylene carbonate are expounded
阐述了用于环氧乙烷催化水合反应中的多羧酸衍生物催化体系、离子交换树脂催化体系、大环螯合物催化体系、季?盐催化体系、多相水滑石型催化体系及其他催化体系近年来的研究进展；同时阐述了用于碳酸亚乙酯法合成乙二醇反应中的催化体系的新进展。
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