Method for removing Cl from copper sulfate solution

Abstract

The invention discloses a method for removing Cl from copper sulfate solution. The method for removing Cl from the copper sulfate solution comprises the following steps that 1, the pH value of the copper sulfate solution is adjusted to 1-1.5; and 2, cuprous oxide powders are added into the copper sulfate solution, the reaction pH value is controlled to be 1-2, and the solid-liquid separation is carried out after the precipitation reaction to obtain a dechlorinated copper sulfate solution and dechlorination slags. According to the method for removing Cl from the copper sulfate solution, throughthe pH value adjustment of the copper sulfate solution and the control of a specific reaction system, the efficient removal of Cl in the copper sulfate solution is achieved, the method is suitable for removing chloride ions from copper sulfate solution with chloride ion concentration of 0.01-20g / L, and the chloride ion concentration after removing the chloride ions is controlled at 50 mg / L or below. The method for removing Cl from the copper sulfate solution has the advantages of being stable in a dechlorination effect, high in dechlorination efficiency, simple in technical operation, free ofwaste water and waste gas generation and the like, and can be widely applied to the purification of copper sulfate solutions which are recycled in the production of electrodeposited copper and cupricsulfate purified products.

Description

technical field [0001] The invention relates to the technical field of wet copper resource regeneration, in particular to a method for removing chlorine in a copper sulfate solution. Background technique [0002] In the production of electroplating-grade copper sulfate crystallization, with the increase in the number of cycles of copper sulfate solution, the chlorine content in the solution continues to accumulate and increase, resulting in a continuous decline in the quality of the product, especially the quality of high-purity electroplated copper sulfate is affected. In order to obtain For better product market positioning, the common method is to replace the copper sulfate solution, resulting in increased production costs, low resource recycling rate, and increased pressure on subsequent wastewater treatment. Also in the wet-process copper regeneration resource industry, the raw materials usually contain a certain concentration of chloride ions. The lead alloy anode used...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of complex chloride ion removal operation and limited chloride ion treatment range in the existing copper sulfate solution, and provide a method for removing chlorine in copper sulfate solution, through Cuprous oxide reacts with copper sulfate solution to form cuprous chloride precipitate, which is filtered to remove chlorine, and the chloride ion concentration of the obtained copper sulfate solution is below 50mg / L, which has a significant chlorine removal effect