Gerald J Shoemaker

US Patent:

44473117, May 8, 1984

Filed:

Jul 22, 1982

Appl. No.:

6/400841

Inventors:

Patrick E. Fowles - Doylestown PA
Gerald L. Shoemaker - Yardley PA

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

C10G 7306
C10G 7326

US Classification:

208 35

Abstract:

A dewaxing process for reducing the pour point of waxy oils in which the oil is cooled by direct contact with a liquid autorefrigerant such as propane. The wax which separates upon cooling is removed by flotation assisted by the bubbles of vaporized autorefrigerant which rise through the oil to form a frothy slurry of wax which can be decanted and the wax recovered from it. A dewaxing solvent such as methyl ethyl ketone may be used to assist separation of the wax.