METHOD AND APPARATUS FOR RECOVERING ORGANIC SOLVENT FROM WASTE

摘要

PROBLEM TO BE SOLVED: To efficiently recover an organic solvent from waste including the organic solvent with little energy consumption. SOLUTION: The waste including the organic solvent 13 is mixed with liquid carbon dioxide 12 by a mixer 14 to dissolve the organic solvent 13 in the waste in the liquid carbon dioxide 12. The liquid carbon dioxide 12 dissolving the organic solvent 13 is separated from the residue 17 of the waste by the difference in specific gravities by a first separating vessel 21. The pressure of the liquid carbon dioxide 12 dissolving the organic solvent 13 separated from the residue 17 of the waste is reduced by a reducing valve 18 to vaporize the carbon dioxide. The organic solvent 13 is separated from the carbon dioxide gas vaporized by the reduction of the pressure by the reducing valve 18 in a second separation vessel 22. COPYRIGHT: (C)2008,JPO&INPIT