Safety Kleen Corporation

William M Langdon, Deceased

Douglas A Larson

Gilbert Gavlin

Boris Goltsin

Gunther Erlebacher

An apparatus for removing non-volatile residues and impurities from a used solvent includes a self-scrubbing heating distillation subassembly for separating purified solvent for reuse and a controlled waste collector subassembly for overflowing concentrated residues and impurities stripped from the used solvent into an easy-to-service container. The apparatus may be disposed in a parallel in-line relationship with a circulating solvent flow circuit, such as in a dry cleaning operation, to continuously withdraw and purify aliquot portions of the circulating solvent stream, returning good solvent back to the flow circuit and concentrating non-volatile residues and impurities to a removable, environmentally sound serviceable container. The new and improved self-scrubbing heater assembly causes a rapid turbulent reboiling flow of solvent within a confined column and substantially avoids build up of residues on heat exchange surfaces for prolonged heater life and longer uninterrupted service life before service is needed.

Growing community of inventors

Green Valley, AZ, United States of America

William M Langdon, Deceased