Lu Xiu-mei
2001
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Journal
Chlor-alkali Industry
Abstract
According to statistically analysis of orthogonal experiment results and test of significance level of each factor,optimum conditions for the synthesis of tetrachlorophthalic anhydride by chlorina- ting phthalic anhydride with chlorine gas were obtained,which were as follows:reaction time 12 h,temperature from 80 ℃ to 160 ℃,1∶10∶B 1∶C 2 material molar ratio of phthalic anhydride,industrial solvent,catalyst and chlorine gas.Under these conditions,the product molar yield was 98%,and catalyst and solvent could be recovered,with recovery rate of over 85% for solvent and over 50% for catalyst.This process had some advantages,such as high yield,high product quality,low cost and no large amounts of waste sulfuric acid.The same results were obtained when solvent was industrial grade instead of chemical grade and the reactor was magnified by 5 times.