No abstract

No abstract

The process of sulfidation of C 12 C 14 -olefin fractions in the presence of various dialkyl dithiophosphoric acid derivatives is studied. The optimal catalyst concentrations and process duration that help get a high-sulfur product containing 24.8 wt. % of chemically bound sulfur are determined.The product can be recommended as an additive for improving tribological properties of lubricants.

A new additive for transmission oils is synthesized by reacting an amylene fraction with sulfur monochloride, followed by sulfidation of the resulting reaction mixture with sodium sulfide. Results are reported from tests of TM-4-12, SAE 80W-85, and API GL-4 transmission oils with the use of the synthesized high-sulfur additive. A basic diagram of the additive production process is proposed.

No abstract