Century Manufacturing Company

Michael W Johnson

William S Dea

Thomas D Chandler

Kenneth W Ische

An apparatus for the treatment and recovery of spent vehicle coolant that involves the following steps:

Vehicle coolant recycling

A process and apparatus for the treatment and recovery of spent vehicle coolant that involves the following steps: a) removing the spent coolant from the engine; b) treating the spent coolant with sodium dimethyldithiocarbamate to cause dissolved metals therein to form insoluble particles; c) treating the spent coolant of step b) with an aqueous basic coagulating agent such as a polyquaternary ammonium compound in its hydroxide form; d) filtering the spent coolant from step c) through a set of filters and then through a bed of carbon particles, to produce a relatively cleaner liquid; and e) adding to the relatively clear liquid a combination of corrosion inhibitors, buffering agents and alkali, whereby the treated coolant can be recycled to the vehicle for effective coolant performance therein.

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Saint Paul, MN, United States of America

Michael W Johnson