| 摘要 |
PURPOSE:To prevent the degradation of various liquids, continuously for a long period, by passing a liquid such as water-soluble metal working fluid, water, etc. through a vessel containing a sterilizing agent prepared by the ionic adsorption of a sterilizing metal to an adsorbent. CONSTITUTION:A sterilizing metal such as silver, copper, etc. is adsorbed to an adsorbent 1 such as zeolite, activated carbon, etc. by ion-exchange, and the obtained sterilizing agent 2 is put into a vessel 3 having e.g. a cylindrical form. A liquid 4 such as water-soluble metal working fluid, water, etc. is passed through the vessel 3 to effect the dissolution of the metallic ion from the sterilizing agent 2 into the liquid 4, and the sterilizing liquid 5 containing dissolved metallic ion is added to the liquid 6 for the degradation-preventing treatment. EFFECT:Effective to prevent the degradation of water-soluble metal working fluid for the cooling or lubrication of a grinding machine, NC-machine tool, etc., rolling oil for a rolling mill of ironworks, cooling water for cooling tower, water for pisciculture tank and goldfish basin, etc., and water of swimming pool, etc. |
