Regarding the issue of recovering silver from waste silver paste
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Incineration was used, but large losses were found. Do any of you have any good suggestions? Waste silver paste contains organic solvents and a small amount of additives.
I work in the recycling industry. Please tell me what process was used to produce your silver paste, how much there is of it, and what the main organic impurities are; I can help you deal with this issue. No disturbance unless invited. 15853858201
Precipitation is carried out using sodium thiosulfate and silver to obtain silver sulfide precipitate; then, silver sulfide is heated at high temperatures to yield pure silver. It’s extremely simple – we can work together on this
It was done last year: first, incineration is carried out to remove organic matter and oils (by burning at high temperatures until it turns to ash), and then acid treatment follows, followed by precipitation of silver chloride and reduction. . . . I’ve never estimated the recovery rate; it’s all goods that have been stored for several years. By selling them when silver prices are high, there is still a certain profit to be made!
Fry it in an iron pan, then use heat treatment
Using the silver-absorbing resin DEX-Ag, trace amounts of silver in wastewater and liquid waste can be extracted, including silver at ppm levels. The cost is very low
Silver can be precipitated using sodium chloride, and then pure silver can be obtained by displacing it with iron sheets and hydrochloric acid.
Reply to 1# ljtcchem: Sodium chloride is used to precipitate silver; the upper layer of liquid is removed, the precipitate is washed with clean water, ammonia is added to adjust the pH to 11, and glucose can be used to reduce it and obtain silver powder.