| 摘要 |
PROBLEM TO BE SOLVED: To provide a system which can achieve significant reduction of operation cost and improvement of operation efficiency in dry-cleaning by removing, effectively and inexpensively, fat and oil dirt transferred from laundry to the solvent, cleaning the solvent highly, and making it usable repeatedly for a long period of time. SOLUTION: By bringing a solvent S having been for dry-cleaning into contact with a solid treatment agent C whose main component is calcium oxide, fat and oil dirt in the solvent S is changed to fatty acid calcium and removed. COPYRIGHT: (C)2007,JPO&INPIT
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