Patent ID: 8173823
Filing Date: 2012-05-08
Classification: B01D,C07C,C07D

Abstract:
1. A process for preparing epichlorohydrin, comprising chlorinating glycerol, an ester thereof, or a mixture thereof to produce dichloropropanol, and dehydrochlorinating at least a fraction of the dichloropropanol to produce epichlorohydrin, wherein chloroacetone formed as a by-product in said process is at least partially removed during, prior to, or both during and prior to the dehydrochlorinating, said removal during said dehydrochlorinating comprising treating the dichloropropanol with a substoichiometric amount of a basic compound at a temperature of 25 to 50° C., said removal prior to said dehydrochlorinating comprising at least one treatment selected from the group consisting of distillation, evaporation and stripping in the presence of water, said treatment removing a fraction comprising water and chloroacetone and providing dichloropropanol having a reduced content of chloroacetone.