High percentage recovery method for purifying microemulsions

摘要

The invention is directed to purifying semi-synthetics, and may be conducted off-line or on line with a metal working process. In accordance with the invention, a tangential filter flow path for the microemulsions is provided to tangentially pass through a membrane filter sized to permit passage of microemulsions but inhibit passage of contaminants. The microemulsions are maintained in a tangential flow through the membrane filter with tangential flow velocity in the range of 1 m/s-7 m/s. A low filtering pressure is maintained in the range of 0.05-0.7 bar.