Method for producing copper chloride through waste etching liquid containing copper

The invention relates to a method for producing copper chloride through waste etching liquid containing copper. The method includes the following steps that 1, clean water is added in a neutralization kettle and heated, the acidic waste etching liquid and the alkaline waste etching liquid are added into the neutralization kettle for reaction, and the reacted liquid is subjected to centrifugation and rinsing to obtain copper chloride crystals; 2, the copper chloride crystals generated in the first step react with hydrochloric acid to obtain a copper chloride solution, and the solution is concentrated and crystallized to obtain a copper chloride dihydrate product; 3, the copper chloride dihydrate is dehydrated into anhydrous cupric chloride. The method has the advantages that the waste etching liquid containing copper is adopted to produce copper chloride, copper can be recovred and utilized better, and besides, pollution of the waste etching liquid containing copper to the environment is reduced; when the waste etching liquid containing copper is used for producing the copper chloride, impurities of the waste etching liquid containing copper do not need to be removed before the waste etching liquid is used, the purity of the prepared copper chloride is high, the production method is simple, and cost is low.