Marine diesel lubricant oil compositions
AssigneeChevron Oronite Technology B.V.
InventorsCornelis Hendrikus Maria Boons, Theodorus Constance Cleophas
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Abstract
A lubricating oil composition can include a major amount of an oil of lubricating viscosity and a minor amount of an alkaline earth metal phenol-based detergent. The lubricating oil composition can further have a BN of greater than 140 mg KOH/g, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of unsulfurized tetrapropenyl phenol and its unsulfurized metal salt.
Claims16
A marine diesel cylinder lubricating oil composition comprising:
- (a) a major amount of an oil of lubricating viscosity;
- and
- (b) a minor amount of a phenol-based detergent, wherein the minor amount of the phenol-based detergent includes (i) a high overbased phenate detergent having a TBN above 250 or a high overbased carboxylate detergent having a TBN above 250 and (ii) a medium overbased phenate detergent having a TBN of about 100 to about 250 or medium overbased carboxylate detergent having a TBN of about 100 to about 250;
- and
- wherein the marine diesel cylinder lubricating oil composition has a BN of greater than 140 mg KOH/g, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of unsulfurized tetrapropenyl phenol and its unsulfurized metal salt.
A marine diesel cylinder lubricating oil composition comprising:
- (a) a major amount of an oil of lubricating viscosity;
- and
- (b) a minor amount of an overbased alkaline earth metal alkylphenate detergent, wherein the minor amount of the overbased alkaline earth metal alkylphenate detergent includes (i) a high overbased alkaline earth metal alkylphenate detergent having a TBN above 250 and (ii) a medium overbased alkaline earth metal alkylphenate detergent having a TBN of about 100 to about 250;
- and
- wherein the marine diesel cylinder lubricating oil composition has a BN of greater than 140 mg KOH/g, and further wherein the marine diesel cylinder lubricating oil composition is substantially free of unsulfurized tetrapropenyl phenol and its unsulfurized metal salt.
A marine diesel cylinder lubricating oil composition comprising:
- (a) a major amount of an oil of lubricating viscosity;
- and
- (b) a minor amount of a phenol-based detergent, wherein the minor amount of the phenol-based detergent includes (i) a high overbased phenate detergent having a TBN above 250 or a high overbased carboxylate detergent having a TBN above 250 and (ii) a medium overbased phenate detergent having a TBN of about 100 to about 250 or medium overbased carboxylate detergent having a TBN of about 100 to about 250;
- and
- wherein the marine diesel cylinder lubricating oil composition has a BN of greater than 140 mg KOH/g, the marine diesel cylinder lubricating oil composition is substantially free of unsulfurized tetrapropenyl phenol and its unsulfurized metal salt, and the marine diesel cylinder lubricating oil composition has a better oxidative stability at elevated temperatures than if the marine diesel cylinder lubricating oil composition had the same BN and detergents not including a phenol-based detergent.
Dependencies are inferred from the claim text.