The main catalysts used are PTC, strong acidic ion-exchanging resin, solid super acid, etc.
主要的催化剂有季铵盐、强酸性离子交换树脂、固体超强酸等。
2
Their methods include the use of strips of ion-exchanging plastic, braided with polystyrene to toughen them up....
他们的方法包括利用聚苯乙烯加固的离子交换塑料带。
3
Through selecting extracting solvent, extracting times and alkalinizing method, Oxymatrine is extracted and purified by ion-exchanging and re-crystallization.