Patent ID: 9637806
Date: 2017-05-02
CPC Classifications: B22F,B82Y,C02F,C22B

Claim:
1. A method for treating a silver-containing solution, the method comprising: providing a silver-containing aqueous solution comprising cationic silver species; disposing an organic acid and a buffering agent in the silver-containing aqueous solution to form a reaction solution comprising a concentration of the organic acid, a concentration of the buffering agent, and a concentration of the cationic silver species, wherein the concentration of the organic acid is equimolar to or in a stoichiometric excess of the concentration of the cationic silver species, and wherein the buffering agent comprises citric acid and at least one of sodium phosphate dibasic and sodium phosphate monobasic; and generating a reaction product comprising metallic silver, thereby reducing the concentration of the cationic silver species in the reaction solution, wherein the metallic silver is precipitated from the solution.