Sulfurized compositions
AssigneeThe Lubrizol Corporation
InventorKirk E. Davis
Life of this patent
Estimating the term…
Abstract
Sulfurized compositions are prepared by the reaction, under superatmospheric pressure, of olefinic compounds with a mixture of sulfur and hydrogen sulfide in the presence of an acidic, basic or neutral catalyst, followed by removal of low boiling materials including unreacted olefin, mercaptan and monosulfide. An optional final step is removal of active sulfur; for example, by treatment with an alkali metal sulfide. The resulting sulfurized compositions are useful as lubricant additives.
Claims45
A method for the preparation of a sulfurized composition which comprises the steps of reacting at about 50.degree.-300.degree. C., under superatomspheric pressure and in the presence of a catalyst, sulfur and hydrogen sulfide with at least one olefinic compound containing 3 to about 30 carbon atoms to form a sulfurized mixture;
- about 1.2-3.0 gram-atoms of sulfur and about 0.1-1.5 moles of hydrogen sulfide being used per mole of olefinic compound;
- and removing from said sulfurized mixture substantially all low boiling materials including unreacted olefin, mercaptan and monosulfide.
The method for the preparation of a sulfurized composition which comprises the steps of reacting at about 50.degree.-300.degree. C., under superatmospheric pressure and in the presence of a catalyst, sulfur and hydrogen sulfide with at least one terminal aliphatic monoolefin containing less than 9 carbon atoms to form a sulfurized mixture, about 1.2-2.0 gram-atoms of sulfur and about 0.1-1.5 moles of hydrogen sulfide being used per mole of monoolefin;
- and removing from said sulfurized mixture substantially all low boiling materials including unreacted monoolefin, mercaptan and monosulfide.
Dependencies are inferred from the claim text.