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PRODUCTION OF INORGANIC ANTIMICROBIAL AGENT BY TREATING WASTE SUPPORTED SILVER CATALYST WITH DILUTE NITRIC ACID TO MELT SILVER FROM CATALYST WHILE KEEPING SILVER CHLORIDE WHICH IS SUPPORTED ON CARRIER INTACT AND PRODUCTION OF ANTIMICROBIAL RESIN COMPOSITION HAVING LOW TOXICITY AND HIGH ANTIBACTERIAL POTENCY USING INORGANIC ANTIMICROBIAL AGENT
PRODUCTION OF INORGANIC ANTIMICROBIAL AGENT BY TREATING WASTE SUPPORTED SILVER CATALYST WITH DILUTE NITRIC ACID TO MELT SILVER FROM CATALYST WHILE KEEPING SILVER CHLORIDE WHICH IS SUPPORTED ON CARRIER INTACT AND PRODUCTION OF ANTIMICROBIAL RESIN COMPOSITION HAVING LOW TOXICITY AND HIGH ANTIBACTERIAL POTENCY USING INORGANIC ANTIMICROBIAL AGENT
PURPOSE: Provided is a method of making an inorganic antimicrobial agent by treating waste supported silver catalyst with dilute nitric acid to melt the silver from the catalyst while keeping the silver chloride which is supported on the carrier intact. The method utilizes an inorganic carrier which has hitherto been discarded at low cost. The obtained inorganic antimicrobial agent is coated on the resin or mixed with the resin to give an antimicrobial resin composition. CONSTITUTION: The inorganic antimicrobial agent in which silver chloride is supported on a carrier in the range of 0.1 to 5% by weight is prepared by melting the silver using 20 to 80% dilute nitric acid while keeping the silver chloride which is supported on the carrier intact. To change the silver in the waste supported silver catalysts to silver chloride, the catalyst is introduced into a reactor and then reacted at 0 to 50deg.C at 1 to 10atm. The resin is prepared by mixing 0.1 to 5% by weight of the inorganic antimicrobial agent with the resin or coating on the resin. The resin is one or more selected from polyethylene, polypropylene, polyvinyl chloride, polystyrene, ABS resin, polyester resin, nylon, polyamide, polyvinyl alcohol, polyvinyl acetate, polycarbonate, polyurethane, epoxy resin, rayon resin, natural rubber and synthetic resin.
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