Hydrocarbon compositions useful as lubricants for improved oxidation stability
AssigneeExxonMobil Research and Engineering Company
InventorsJoshua D. Catanach, Clara Rodrigue, Christine A. Zielinski, Charles L. Baker, JR., Richard C. Dougherty, Min Chen
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Abstract
Provided herein are hydrocarbon compositions suitable for use as a lubricant comprising sulfur between about 30 ppm to about 220 ppm, and aromatics between about 0.2 wt. % to about 3 wt. %. The present hydrocarbon compositions comprise a blend of one or more base stocks and a high-sulfur containing material and can demonstrate an improved oxidation performance as a lubricant in weighted piston deposit merits and/or by viscosity increase.
Claims23
A hydrocarbon composition comprising:
- about 30 ppm to about 220 ppm of sulfur;
- about 0.2 wt. % to about 3 wt. % of aromatics;
- about 27.8 wt. % to about 99.7 wt % of paraffins;
- about 0.0 wt. % to 63.9 wt. % of naphthenes;
- wherein the hydrocarbon composition demonstrates an increase in lubricant weighted piston deposit merits over a hydrocarbon composition having the same amount of paraffins and naphthenes and less than 30 ppm of sulfur and less than 0.2 wt. % aromatics.
A hydrocarbon composition comprising sulfur between about 30 ppm to about 220 ppm, and aromatics between about 0.2 wt. % to about 3 wt. %, wherein the hydrocarbon composition demonstrated an improvement in lubricant oxidation stability over a hydrocarbon composition having the same amount of paraffins and naphthenes and less than 30 ppm of sulfur and less than 0.2 wt. % aromatics.
A hydrocarbon composition comprising:
- a blend of one or more base stocks and a high-sulfur containing material, wherein each base stock has a kinematic viscosity at 100° C. between about 3.0 cSt and about 12.0 cSt, a viscosity index (VI) between about 80 and about 150, a pour point between about −15° C. and −60° C., a NOACK volatility between about 5.0 wt. % and 15.0 wt. %, a sulfur content between about 0 ppm and 100 ppm, aromatics in amount less than 3.0 wt. %, and an NMR branching index between about 20.6 and 38.3, and the high-sulfur containing material comprises between about 0.01 to 4.5 wt. % sulfur.
Dependencies are inferred from the claim text.