| 摘要 |
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.
|
