C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/202
C10G 19/02 (2006.01) C10G 29/00 (2006.01) C10M 175/00 (2006.01)
Patent
CA 1144100
DE-ASHNG LUBRICATING OILS Abstract of the Disclosure A process for the production of an essentially ash-free oil stock from a lubricating oil containing ash-forming components comprising (a) contacting said lubricating oil with an aqueous ammonium salt treating agent; (b) removing a major portion of the water from the mixture resulting from combining said aqueous solution and said lubricating oil; (c) heating at least a portion of the product resulting from step (b) at a temperature in the range of about 320° to about 420°C for a period of time sufficient to decompose at least a portion of any ammonium salts of sulfonic acid and dialkyldithiophosphoric acid that are contained therein; (d) cooling the product from step (c) to a temperature in the range of about 150° to about 180°C; and (e) separating the solids from the product of step (d), optionally with subsequent hydrotreating and stripping of the oil thus obtained.
358068
Johnson Marvin M.
Nowack Gerhard P.
Tabler Donald C.
Osler Hoskin & Harcourt Llp
Phillips Petroleum Company
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