摘要:
The present application relates to a method for photochlorination, and specifically to photochlorination by a photochemical reaction of an aromatic compound with gaseous chlorine so as to prepare a trichloromethyl-substituted benzene, and to a method using bis-(trichloromethyl)-benzene as the trichloromethyl-substituted benzene to prepare by further reaction bis-(chloroformyl)-benzene. Through the control of temperature, illuminance and consumption of gaseous chlorine, the method of this application can greatly improve the purity of trichloromethyl-substituted benzene and further prepare polymer-grade bis-(chloroformyl)-benzene with low cost. The present application also relates to a method for purifying trichloromethyl-substituted benzene, and specifically to a method for purifying trichloromethyl-substituted benzene via molecular distillation. The present application further relates to a photochlorination reactor for use in photochlorination reactions (such as those of the present application).
摘要:
The present invention pertains to the field of chemical technology, and relates to a clean process of preparing a chloroformyl-substituted benzene. The process of the present invention is done by oxidation of a tail gas hydrogen chloride from a chlorination reaction and a chloroacylation reaction and recycling of the resulting oxidation product chlorine gas into the chlorination reaction. The present invention provides a clean process of preparing a polymer-grade chloroformyl-substituted benzene.
摘要:
Disclosed is a method for preparing chlorine gas through catalytic oxidation of hydrogen chloride, and more particularly a method for preparing chlorine gas by carrying out one-time hydrogen chloride feeding and multi-stage oxygen feeding and/or one-time oxygen feeding and multi-stage hydrogen chloride feeding, returning a product gas stream without separation thereof, and optionally carrying out heat insulation means. According to the present invention, an excessive reaction heat concentration is prevented, therefore, the method of the present invention is a chlorine gas recovery method implemented through the Deacon catalytic oxidation of hydrogen chloride that can be industrialized.