METHOD OF OPERATING A DISTILLATION COLUMN FOR PURIFYING 1,2-DICHLOROETHANE AND FOR COUPLED SODIUM HYDROXIDE SOLUTION EVAPORATIVE CONCENTRATION

摘要

The water and low boiling components compared to the 1,2-dichloroethane and 1,2-dichloroethane a method for operation of the distillation tower so as to remove from , and at least a portion of the heat resulting from the condensation of water vapor in the distillation column used to concentrate the caustic soda solution by evaporation , as well as forming the case of the reaction of ethylene and chlorine in direct chlorination unit at least a portion of the 1,2-dichloroethane which are used to heat the distillation column , can be used as the heat transfer fluid in order to concentrate the sodium hydroxide solution by evaporation after .