p-Toluenesulfonyl chloride

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Study on the Synthesis of p-Toluenesulfonyl Chloride. February 2004. Chen Zhongxiu, Jiang Linfeng, Ding Tongfu, Xu Yun, Sun Lei, Yu Xingyuan. p-Toluenesulfonyl chloride was synthesized using toluene, chlorosulfonic acid, and phosphorus trichloride as raw materials, with ammonium chloride as a catalyst. The effects of the amounts of chlorosulfonic acid, phosphorus trichloride, the catalyst, and the reaction time on the sulfonation reaction were investigated. The optimal molar ratio of the raw materials was determined to be 1:1.3:0.6:0.1 for toluene:chlorosulfonic acid:phosphorus trichloride:ammonium chloride; the yield of the product was 98.85%, while the pure yield was 97.86% (85.41% p-toluenesulfonyl chloride and 12.45% o-toluenesulfonyl chloride). Additionally, acidic wastewater generation was reduced by more than 70% compared to the original process. Could anyone help me download this literature? Thank you very much! ! !