초록 ▼

Sulfurized compositions are prepared by the reaction, under superatmospheric pressure, of olefinic compounds with a mixture of sulfur and hydrogen sulfide, followed by removal of low boiling materials including unreacted olefin, mercaptan and monosulfide. An optional final step is removal of active

Sulfurized compositions are prepared by the reaction, under superatmospheric pressure, of olefinic compounds with a mixture of sulfur and hydrogen sulfide, 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.

대표청구항 ▼

A method for the preparation of a sulfurized composition which comprises the steps of reacting at about 50°-300°C., under superatmospheric pressure and in the absence of catalysts, sulfur and hydrogen sulfide with at least one olefinic compound containing 3 to about 30 carbon atoms to form a sulfuri

A method for the preparation of a sulfurized composition which comprises the steps of reacting at about 50°-300°C., under superatmospheric pressure and in the absence of catalysts, 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.