Method for producing cuprous chloride using copper oxychloride

Abstract

The process of producing cuprous chloride with copper oxychloride includes the following steps: mixing copper chloride solution and / or dilute hydrochloric acid solution with copper oxychloride solution to form mixed solution A with Cu ion / Cl ion weight content ratio of 63.5 to 37.5-40; 2. heating the solution A to 50-80 deg.c, and adding reductant until the solution A changes its color from green to maple to obtain solution B; 3. adding pure water to the solution B, stirring, rinsing to obtain solution C with precipitate; and 4. washing the precipitate with dilute hydrochloric acid solution and alcohol successively, filtering and drying to obtain cuprous chloride. The process has less effluent and high yield.

Description

technical field [0001] The invention relates to a method for producing cuprous chloride with cupric oxychloride. Background technique [0002] There are generally four methods for producing cuprous chloride: [0003] The first is to use electrolytic copper to pass chlorine and cast to produce cuprous chloride; [0004] The second is to use copper chloride solution (the main component of circuit board etching solution) as a raw material, and use sponge copper as a reducing agent to prepare cuprous chloride; [0005] The third is to use copper sulfate solution as a raw material, salt as an auxiliary agent, and then add a reducing agent to produce cuprous chloride; [0006] The fourth is to use copper hydroxide as a raw material and prepare cuprous chloride with sodium sulfite reduction reaction. This method is also the main method for processing circuit board etching waste liquid at present. [0007] Among the above four methods, the first electrolytic copper is the main ra...

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Problems solved by technology

[0007] Among the above four methods, the first electrolytic copper is the main raw material, and electrolytic copper resources are in short supply globally, liquid chlorine is used as the reducing agent, and a high temperature of 800 degrees Celsius is required in the re-reduction process, which requires very high material requirements for the reaction equipment , and the safety is poor; the second method is to use cupric chloride solution as raw material, sponge copper as reducing agent, although using copper raw material as reducing agent is the best method, but sponge copper requires a large amount of iron raw material when making A large amount of iron-containing wastewater is difficult to deal with and the treatment cost is high; the third type uses copper sulfate solution as raw material, sodium sulfite, sulfur dioxide gas or sodium bisulfite as reducing agent, and industrial salt must be added before the reaction. Auxiliaries just increase the production cost of materials. In this method, the proportion of copper ions in the copper sulfate solution is small, and the production capacity is poor; the fourth method uses copper hydroxide mud as raw material and sodium sulfite as a reducing agent. Ammonium chloride and sodium chloride contained in waste water cannot be separated, recycled and regenerated. Among them, ammonium chloride and sodium chloride cause the difficulty and cost of sewage treatment