- Preparation method of mesialose
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In the presence of a catalyst, mesitylene is used as a raw material, chlorine is introduced for chlorination reaction to obtain mesialose, and the catalyst is azobisisobutyronitrile. The preparation process is simple, the conversion rate is high, the prep
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Paragraph 0038-0049
(2021/11/26)
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- CLEAN PROCESS FOR PREPARING CHLOROFORMYL-SUBSTITUTED BENZENE
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Clean process for preparing a chloroformyl-substituted benzene 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 for preparing a polymer-grade chloroformyl-substituted benzene.
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Paragraph 0125; 0152; 0163
(2017/12/17)
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- METHOD FOR THE PREPARATION OF TRICHLOROMETHYL-GROUP-SUBSTITUTED BENZENE
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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).
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Paragraph 0158
(2016/06/28)
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