Method for producing tribasic copper chloride

Abstract

The invention discloses a method for producing tribasic copper chloride. The method for producing the tribasic copper chloride includes the following steps of: (1) removing impurities from an acidic etching waste solution; (2) adding clean water or a tirbasic copper chloride production mother solution to a synthesis reactor, performing preheating, and then, preheating the acidic etching waste solution whose impurities have been removed and an alkaline solution of sodium hydroxide and mixing the two solutions for a reaction with the pH value and temperature of the reaction being controlled so as to gradually form the tribasic copper chloride, and discharging partial materials after a certain amount of reaction time; (3) filtering the materials discharged from the reaction system, and performing washing, suction filtration, centrifugation and drying on the filtrated residues to obtain the tribasic copper chloride; and (4) performing ammonia nitrogen removal treatment on filtrated liquid. By adopting the method for producing the tribasic copper chloride in the invention, continuous production can be achieved and the tribasic copper chloride with large particle size and high purity can be produced; further, production cost can be reduced and overall process can be integrated; and the method for producing the tribasic copper chloride is advantaged in simple ultimate steps of ammonia nitrogen removal, easiness in operation as well as reduced difficulty and cost of ammonia nitrogen treatment.

Description

technical field

[0001] The invention belongs to the field of etching waste liquid treatment, and in particular relates to a production method of basic copper chloride. Background technique

[0002] At present, copper sulfate is mostly used as a trace additive in domestic feed, but copper sulfate is easy to absorb moisture and agglomerate, has poor dispersibility, and strong oxidation during use, which destroys nutrients such as vitamins and fats in the feed, and is harmful to zinc and iron. There are disadvantages such as antagonistic effect which affects its absorption. Therefore, it is necessary to develop a new and efficient copper source additive to replace copper sulfate.

[0003] Basic copper chloride has been used in the United States for more than ten years. Studies have shown that compared with copper sulfate, basic copper chloride has the following advantages: ①No moisture absorption, no agglomeration, uniform distribution, and rumen-passing function for ruminan...