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介绍了从亚磷酸二甲酯的副产尾气中回收氯化氢制浓盐酸的工艺 ,采用溶剂分段循环和降温相结合的方法 ,可使氯化氢的回收率达 99%以上 ,盐酸浓度大于 30 %。
The process of recovering concentrated hydrochloric acid from hydrogen chloride by-product of dimethyl phosphite was introduced. The recovery of hydrogen chloride was over 99% and the concentration of hydrochloric acid was more than 30%.