Production of PS-28 oil from West Siberian crudes

The problem of how to supply metallurgical plants with high-quality viscious oil for liquid-lubrication bearings has become serious due to the exhaustion of resources and newer severe conditions at mills. The experimental Pp-28 additive oil from medium-sulfur West Siberian crude is studied in this paper. A batch of oil of the PS-28 type from medium sulfur crudes as a base stock for the Pp-28 oil is obtained. Differences in crude source and manufacturing technology are seen to be responsible for the differences between the PS-28 experimental oil and VI-250 oil. Results obtained show that the experimental oil, in comparison with VI-250 and commercial PS-28 oil, is lower in sulfur content and carbon residue, is better in demulsifying and antifoaming properties, but is not as good in oxidation resistance. On the basis of these studies the feasibility for the production of a PS-28 type oil from West Siberian crude has been demonstrated.