Method for preparing cuprous chloride by high-value utilization of chloride ion-containing wasterwater

A method for preparing cuprous chloride by high-value utilization of chloride ion-containing wastewater, wherein the method comprises the following steps:

• (1) primary reaction:
• taking wastewater containing chloride ions and adjusting the pH to 2 to 3.5;
• then, adding 50% to 80% of a theoretical amount of cuprous oxide according to a Cl− concentration, and maintaining the pH at 2 to 3.5 during this period;
• reacting with stirring for 8 to 15 minutes after the addition of the cuprous oxide;
• and performing centrifugation after the reaction to obtain crude cuprous chloride and supernatant, the supernatant is to be subjected to a secondary reaction;
• (2) secondary reaction:
• adding cuprous oxide to the supernatant obtained in step (1), with a total of cuprous oxide added in both the primary reaction and the secondary reaction accounting for 90% to 100% of the theoretical amount, and maintaining the pH between 2 and 3.5 during this period;
• reacting with stirring for 8 to 12 minutes after the addition of the cuprous oxide;
• and performing centrifugation after the reaction to obtain crude cuprous chloride;
• and
• (3) performing acid washing, ethanol washing and drying on the crude cuprous chloride obtained in step (1) and step (2).