Non-chlorinated solvent dewax process

Details Non-chlorinated solvent dewax process Non-chlorinated solvent dewax process

1991-10-30

1993-05-11

Morris, Theodore

Cleaning and liquid contact with solids

Processes

Oils, grease, tar, or wax removal, by dissolving

134 5, 134 26, 208 24, C23G 500

Patent

active

052097854

ABSTRACT:
The method involves removing wax from a substrate using a non-chlorinated solvent process. The substrate is dipped in a hot wax bath or heated in an oven to remove substantially all of the wax. The substrate is then submerged in either a single or a series of hot mineral oil baths to remove any remaining wax. The oil is then removed by a semi-aqueous or light organic cleaner. The semi-aqueous cleaner is subsequently removed in an alkaline-base cleaner bath. Following the alkaline-base cleaner is a cleansing with a rinsing solution preferably a countercurrent series of rinses. Finally, the substrate is dried.

REFERENCES:
patent: 2168330 (1939-08-01), Ferris
patent: 2254492 (1941-09-01), Orozco
patent: 2651655 (1953-09-01), Loughran
patent: 2741596 (1956-04-01), Luark et al.
patent: 2746862 (1956-05-01), McDonald
patent: 3003897 (1961-10-01), Schwartz
patent: 4571270 (1986-02-01), Sasaki

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