Calcium chloride was prepared by reaction of dilute by product hydrochloric acid produced during pesticide production with calcite. This is a useful way for reuse of the dilute hydrochloric acid.

• 利用含有机杂质的副产稀盐酸和方解石进行中和反应,溶液经脱色、除杂后制得无水氯化钙产品,质量指标达到产品标准要求,为副产稀盐酸开拓了一个新的利用途径。