High sulfur mineral oil compositions

Details High sulfur mineral oil compositions High sulfur mineral oil compositions

C - Chemistry, Metallurgy

10

M

C10M 137/00 (2006.01) C10M 137/02 (2006.01) C10M 169/04 (2006.01)

Patent

CA 2086199

EI-5457 HIGH SULFUR MINERAL OIL COMPOSITIONS Abstract of the Disclosure Copper corrosiveness of compositions comprising a major amount of a base oil of which at least 50% by volume is mineral oil that has an inherent sulfur content of at least 0.2 percent by weight is reduced by adding to the oil a small amount of at least one oil- soluble neutral hydrocarbyl phosphite ester, most preferably tri- phenyl phosphite. The addition of phosphite can yield composition exhibiting a copper rod rating of 5 or below in the Cincinnati Milacron Thermal Stability test procedure "A", even though in the absence of the addition of phosphite, the composition fails the test. The unpredictability of the invention is shown by the fact that not all high sulfur oils respond to the treatment, and no ex- planation for the divergence of results is presently known.

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