The preparation method of ethyl chloroacetate with ferric chloride hexahydrate,polyvinyl chloride ferric chloride resin,chlorinated polyvinyl chloride ferric chloride resin, p toluene sulfonic acid,strong acidic cation exchange resin, sulfo polyvinyl chloride resin,rare earth compound Nd 2O 3,solid super strong acid catalyst TiO 2 SO 4 2- 、NiO TiO 2 SO 4 2- and ammonium ferric sulfate dodecahydrate as catalysts have been reviewed.It showed that ferric chloride hexahydrate,strong acidic cation exchange resin, p toluene sulfonic acid,solid super...