Efficient recycling method for silver electrolysis old liquid

• Main Authors: DU YANJUN, ZHANG NAIYU, HONG YUAN, WANG LI, WANG CHENGGE, CAO JIEYI, XU PENG
• Format: Patent
• Language: Chinese; English
• Published: 15.07.2022
• Subjects: APPARATUS THEREFOR; CASTING; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; PRODUCTION AND REFINING OF METALS; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

The invention discloses an efficient recycling method for old silver electrolysis liquid. The efficient recycling method comprises the following steps that the pH value of the old silver electrolysis liquid is adjusted to be 2-3; glucose powder accounting for 2-5% of the mass fraction of the old silver electrolysis solution is added into the old silver electrolysis solution; the obtained old silver electrolyte is irradiated for 10-100 hours under sunlight or ultraviolet light, and silver ions in the silver electrolyte are reduced to separate out silver crystals; and then filtering is conducted, silver powder obtained through filtering is prepared into a new electrolyte through nitric acid, filtrate obtained after filtering contains a small amount of silver ions, silver precipitation is conducted on the filtrate through sodium chloride or hydrochloric acid, then filtering is conducted, the filtrate is subjected to wastewater treatment, and filter residues are subjected to silver recovery treatment. And after t