METHOD OF REGENERATING HETEROPOLYACID CATALYST USED IN THE DIRECT PROCESS OF PREPARING DICHLOROPROPANOL BY REACTING GLYCEROL AND CHLORINATING AGENT, METHOD OF PREPARING DICHLOROPROPANOL COMPRISING THE METHOD OF REGENERATING HETEROPOLYACID CATALYST AND METHOD OF PREPARING EPICHLOROHYDRIN COMPRISING THE METHOD OF PREPARING DICHLOROPROPANOL

摘要

Provided are a method of regenerating a heteropolyacid catalyst, a method of preparing dichloropropanol including the method of regenerating a heteropolyacid catalyst, and a method of preparing epichlorohydrin including the method of preparing dichloropropanol. The method of regenerating a heteropolyacid catalyst includes: separating a solid heteropolyacid catalyst from a reaction mixture after preparing dichloropropanol by simply evaporating components having a boiling point lower than that of the heteropolyacid catalyst (simple evaporation); and calcining the separated solid heteropolyacid catalyst (calcination). The method of regenerating the heteropolyacid catalyst may further include recrystallizing the calcined heteropolyacid catalyst (recrystallization).