Patent ID: 6027651
Filing Date: 2000-02-22
Classification: D06F

Abstract:
A method for regenerating a solvent from an extract after use in a remediation process, said extract having a variable amount of organic contaminants dissolved in said extract and having a variable water content, which comprises the steps of:monitoring said water content in said extract to identify a high water level extract when said water content is above a predetermined threshold value and to identify a low water level extract when said water content is below said threshold value;measuring said amount of organic contaminants in said low water level extract to define a high contaminant extract when said amount of organic contaminants is above a predetermined limit and a low contaminant extract when said amount is below said predetermined limit;distilling said high water level extract and said high contaminant extract to remove water and organic contaminants therefrom and to yield said solvent;filtering said low contaminant extract to remove organic contaminants therefrom and to yield said solvent;collecting said solvent yielded from said distilling step and from said filtering step; andproviding said solvent for reuse in said remediation process.