Abstract: In an embodiment is provided a process to re-refine used oil that includes introducing a used oil and a solvent to a separation unit under separation conditions selected to produce a purified oil product, the separation unit comprising a porous membrane, a semiporous membrane, or both; and separating the used oil to obtain an effluent comprising a purified oil product. In another embodiment is provided an apparatus for re-refining used oil that includes a separation unit comprising a porous or semiporous membrane; a used oil feed coupled to an inlet of the separation unit; and an inlet of a diffusate collection unit coupled to an outlet of the separation unit. In another embodiment is provided a composition generated from a membrane separation process that includes a base oil, the composition having a soot content of about 0.05% or less.

Abstract: A lubricant composition is described which is useful as a chain bar lubricant for chain saws. The composition comprises(A) at least one triglyceride wherein the ratio of the oleic acid moiety:linoleic acid moiety is from about 2 up to about 90,(B) at least one viscosity modifying additive, and(C) at least one tackifier.Optionally, the composition may also contain(D) at least one pour point depressant and(E) at least one antiwear agent.

Abstract: A food grade lubricant composition is described which is useful as hydraulic oil, gear oil, and compressor oil for equipment in the food service industry. This composition comprises (A) major amount of a genetically modified vegetable oil and (B) a minor amount of a performance additive. In other embodiments the composition contains either (C) a phosphorus compound or (D) a non-genetically modified vegetable oil.