Sulfurized fatty oil additives and their use in a lubricating oil and a fuel
AssigneeFerro Corporation
InventorsKarl P. Kammann, Jr., Marvin J. Den Herder
Life of this patent
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Abstract
Improved lubricant additive compositions, derived from fatty oils, comprise sulfurized, transesterified triglycerides. Such additive compositions possess improved solubility in oils and impart improved lubrication properties to both lubricant and fuel compositions.
Claims35
A sulfurized, triglyceride additive composition, comprising a sulfurized, transesterified triglyceride wherein the total acid component of the triglyceride comprises no less than about 35 mole % saturated aliphatic acids and no more than about 65 mole % unsaturated fatty acids, said total acid component being further characterized as comprising:
- (a) more than about 20 mole % of mono-unsaturated acids;
- (b) less than about 15 mole % of poly-unsaturated fatty acids;
- (c) more than about 20 mole % saturated aliphatic acids having 6 to 16 carbon atoms, including more than about 10 mole % saturated aliphatic acids having 6 to 14 carbon atoms;
- and
- (d) less than about 15 mole % saturated aliphatic acids having 18 or more carbon atoms.
A method for preparing a sulfurized, transesterified triglyceride additive composition, comprising the steps of:
- (1) transesterifying one or more triglycerides with one or more organic acids, or esters thereof, to yield a transesterified triglyceride wherein the total acid component comprises no less than about 35 mole % saturated aliphatic acids and no more than about 65 mole % unsaturated fatty acids, said total acid component being further characterized as comprising:
- (a) more than about 20 mole % of monounsaturated fatty acids;
- (b) less than about 15 mole % of polyunsaturated fatty acids;
- (c) more than about 20 mole % saturated aliphatic acids having 6 to 16 carbon atoms, including more than about 10 mole % saturated aliphatic acids having 6 to 14 carbon atoms;
- and
- (d) less than about 15 mole % saturated aliphatic acids having 18 or more carbon atoms;
- and
- (2) sulfurizing the transesterified triglyceride product mixture of step 1 with elemental sulfur to incorporate bound sulfur in an amount within the range from about 4 wt. % to about 14 wt. %, based upon the transesterified triglyceride product mixture.
A lubricating oil composition, comprising:
- (1) a refined base oil, having lubricating oil viscosity and volatility properties;
- and
- (2) a minor amount, from about 0.05 to about 15 wt. % of the lubricating oil composition, of a sulfurized triglyceride additive composition, comprising a sulfurized, transesterified triglyceride wherein the total acid component of the triglyceride comprises no less than about 35 mole % saturated aliphatic acids and no more than about 65 mole % unsaturated fatty acids, said total acid component being further characterized as comprising:
- (a) more than about 20 mole % of mono-unsaturated acids;
- (b) less than about 15 mole % of poly-unsaturated fatty acids;
- (c) more than about 20 mole % saturated aliphatic acids having 6 to 16 carbon atoms, including more than about 10 mole % saturated aliphatic acids having 6 to 14 carbon atoms;
- and
- (d) less than about 15 mole % saturated aliphatic acids having 18 or more carbon atoms.
A fuel composition, comprising:
- (1) a blended base fuel, having suitable volatility and combustion properties;
- and
- (2) a minor amount, from about 0.0005 to about 0.1 wt. % of the fuel composition, of a sulfurized triglyceride additive composition, comprising a sulfurized, transesterified triglyceride wherein the total acid component of the triglyceride comprises no less than about 35 mole % saturated aliphatic acids and no more than about 65 mole % unsaturated fatty acids, said total acid component being further characterized as comprising:
- (a) more than about 20 mole % of mono-unsaturated acids;
- (b) less than about 15 mole % of poly-unsaturated fatty acids;
- (c) more than about 20 mole % saturated aliphatic acids having 6 to 16 carbon atoms, including more than about 10 mole % saturated aliphatic acids having 6 to 14 carbon atoms;
- and
- (d) less than about 15 mole % saturated aliphatic acids having 18 or more carbon atoms.
Dependencies are inferred from the claim text.