Method of separation/purification for high-purity silver chloride and process for producing high-purity silver by the same

Abstract

The present invention provides that when separating and refining high-purity silver chloride from refining intermediates, the aforementioned refining intermediates do not require pretreatment and when using them as raw materials to obtain metallic silver, dry refining of metallic silver or reprocessing based on electrolysis may not be performed. Purification treatment, to obtain high-purity silver high-purity silver chloride effective separation and purification method, and the use of the high-purity silver chloride to manufacture high-purity silver method. It is characterized in that: comprising, leaching the aforementioned refining intermediate in an aqueous sulfite solution, extracting silver into the solution to form a leaching solution containing silver and an insoluble residue; neutralizing the aforementioned leaching solution into an acidic , to precipitate silver chloride, to form the silver chloride and the silver chloride generation process of the mother liquor; Silver chloride refining process for solutions containing impurity elements.

Description

technical field [0001] The present invention relates to a method for separating and refining high-purity silver chloride and a method for producing high-purity silver using the high-purity silver chloride. In the case of silver chloride, the aforementioned refining intermediates do not require pretreatment and when using them as raw materials to obtain metallic silver, it is possible to obtain high-purity silver with high purity chlorine without dry refining of metallic silver or re-refining treatment based on electrolysis. A method for separating and refining silver chloride, and a method for producing high-purity silver using the high-purity silver chloride. Background technique [0002] Currently, silver is recovered from anode residue generated in an electrolytic refining process of refining copper, lead, and the like. As a method of separating and purifying high-purity silver from the anode residue, methods of dry-processing the above-mentioned anode residue to obtain ...

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Problems solved by technology

[0016] In addition, as a separation method of impurity elements other than the above, it is known that organic solvents of organic phosphorus compounds such as alkylphosphine sulfides can selectively extract silver, but when thiosulfate leaching solutions are used, silver and thiosulfate ions form Stable complex, so it cannot be used in solution extraction separation

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