rechlorination

The traditional way of synthesizing metaldehyde from single hydrochloric acid catalyst was replaced by a compound hydrochloric acid catalyst, which was prepared through hydrochloric acid, hydroxylamine hydrochloride, sodium bromide, pyridine.

由盐酸、盐酸羟胺、溴化钠、吡啶制得盐酸复合催化剂。