Lubricating oil composition
AssigneeChevron Research Company
InventorThomas V. Liston
Life of this patent
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Abstract
A lubricating oil composition of improved rust-inhibitory capability contains a small amount of a sulfated alcohol having a molecular weight in the range of 500 to 5,000 which is prepared by reacting an aliphatic alcohol or a phenol with ethylene oxide or propylene oxide or mixtures thereof to form a polyoxyalkenylated alcohol which is treated with sodium hydride, potassium, sodium, sodium methoxide, potassium methoxide or potassium tert-butoxide and then is sulfated by treating with chlorosulfonic acid.
Claims6
A lubricating composition comprising an oil of lubricating viscosity and from 10 to 10,000 parts per million of the sulfated alcohol or phenol, having a molecular weight in the range of 500-5,000, said sulfated alcohol or phenol being prepared by the steps comprising:
- 1. reacting (i) an aliphatic alcohol having from 1-20 carbon atoms, from 0 to 10 amino groups and from 1 to 10 hydroxy groups or phenol or a C.sub.1 to C.sub.20 alkyl phenol with (ii) ethylene oxide or propylene oxide or mixtures thereof, to form a polyoxyalkylenated alcohol or phenol,
- 2. reacting said polyoxyalkylenated alcohol or phenol with sodium, potassium, sodium hydride, sodium methoxide, potassium methoxide or potassium t-butoxide to form the sodium or potassium salt of said polyoxyalkylenated alcohol or phenol, and
- 3. sulfating said sodium or potassium salt of polyoxyalkylenated alcohol or phenol by reaction with chlorosulfonic acid to form said sulfated alcohol.
Dependencies are inferred from the claim text.