Method for recycling hydrogen chloride from byproduct hydrochloric acid solution

The invention relates to a method for recycling hydrogen chloride from a by-product hydrochloric acid solution, which comprises the following step of: reacting the by-product hydrochloric acid solution from the outside with a complexing agent and a cyclizing agent in sequence to obtain recyclable crude epichlorohydrin. The technological process is simple and convenient, conditions are mild, operation is easy, recycling of hydrogen chloride resources in the byproduct hydrochloric acid can be achieved, and economic benefits are high. 本发明涉及一种从副产盐酸溶液中回收利用氯化氢的方法，该方法包括自界外来的副产盐酸溶液相继与络合剂、环化剂反应，得到可再利用的粗环氧氯丙烷。该工艺流程简便，条件温和，操作简单，可以实现副产盐酸中氯化氢资源的回收利用，经济效益高。