A PROCESS FOR ELIMINATING EPICHLOROHYDRIN BYPRODUCT

摘要

An epichlorohydrin byproduct eliminating process that is improved to enable a distillation column to be continuously operated for a long time by suppressing the polymerization of a low-boiling point byproduct is provided. In a process of removing byproducts generated during production of epichlorohydrin while flowing back the byproducts in a distillation column, a process for eliminating an epichlorohydrin byproduct comprises: removing a low-boiling point byproduct having a boiling point lower than 115.2 deg.C in the byproducts by water extraction to lower concentration of the low-boiling point byproduct to 10 ppm or less; and injecting a polymerization preventing agent into the reflux material to suppress polymerization of the low-boiling point byproduct while a reflux material including the byproducts is flown back within a distillation column. The low-boiling point byproduct has a boiling point range from 40 to 105 deg.C. The low-boiling point byproduct is selected from acrolein, dichloropropane and dichloropropene.