Process for stabilizing hydroprocessed lubricating oil stocks by

Details Process for stabilizing hydroprocessed lubricating oil stocks by Process for stabilizing hydroprocessed lubricating oil stocks by

1984-11-30

1985-10-29

Gantz, D. E.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 89, 208 97, 208111, 208143, C10G 4908, C10G 4716

Patent

active

045499551

ABSTRACT:
Lubricating oil stocks produced by methods such as catalytic dewaxing or hydrocracking, comprising hydroprocesses, are stabilized against oxidation by the addition of hydrogen sulfide to the hydroprocessing hydrogen-containing feed using hydroprocess effluent as a source of said hydrogen-containing feed. The H.sub.2 S present in the hydrogen-containing feed saturates olefins that contribute to oxidation instability and restores antioxidant sulfur compounds such as thiols to the lube stock.

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