Marine diesel cylinder lubricant oil compositions

• US 10,364,403 B2
• Filed: 11/06/2014
• Issued: 07/30/2019
• Est. Priority Date: 11/06/2013
• Status: Active Grant

• Current Assignee: Chevron Oronite Technology B.V.Chevron Oronite Technology B.V. (Chevron Corp.)
• Original Assignee: Chevron Oronite Technology B.V.Chevron Oronite Technology B.V. (Chevron Corp.)
• Inventors: Boons, Cornelis H. M.
• Primary Examiner(s): Vasisth, Vishal V
• Application Number:
  US14/534,407
• Publication Number:
  US 20150126421A1
• Time in Patent Office: 1,727 Days
• Field of Search: 508391, 508460
• CPC Class Codes: C10M 141/08 at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
• CPC Class Codes: C10M 169/042 the additives being compounds of unknown or incompletely defined constitution only
• CPC Class Codes: C10M 2203/1006 used as base material
• CPC Class Codes: C10M 2207/144 containing hydroxy groups
• CPC Class Codes: C10M 2207/262 derived from hydroxy substituted aromatic acids, e.g. salicylates
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2219/046 Overbasedsulfonic acid salts
• CPC Class Codes: C10M 2219/089 Overbased salts
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2030/02 Pour-point; Viscosity index
• CPC Class Codes: C10N 2030/04 Detergent property or dispersant property
• CPC Class Codes: C10N 2030/08 Resistance to extreme temperature
• CPC Class Codes: C10N 2030/10 Inhibition of oxidation, e.g. anti-oxidants
• CPC Class Codes: C10N 2030/52 Base number [TBN]
• CPC Class Codes: C10N 2040/252 Diesel engines

Abstract

Disclosed herein are marine diesel cylinder lubricating oil compositions which comprises (a) a major amount of one or more Group I basestocks, and (b) a detergent composition comprising (i) one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a TBN of about 100 to about 250, and (ii) one or more high overbased alkyl aromatic sulfonic acids or salts thereof; wherein the aromatic moiety of the alkyl aromatic sulfonic acids or salts thereof contains no hydroxyl groups; and wherein the marine diesel cylinder lubricating oil composition has a TBN of about 5 to about 120.

Claims

1. A marine diesel cylinder lubricating oil composition which comprises:

(a) a major amount of one or more Group I basestocks, and

(b) a detergent composition comprising;

(i) about 5 to about 15 wt. % on an actives basis, based on the total weight of the marine diesel cylinder lubricating oil composition, of one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a total base number (TBN) of about 100 to about 250, wherein the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid is a C₁₂ to C₂₈ alkyl group; and

(ii) about 5 to about 16 wt. % on an actives basis, based on the total weight of the marine diesel cylinder lubricating oil composition, of one or more high overbased calcium alkyl toluene sulfonic acids or salts thereof having a TBN of greater than 250 to about 550;

wherein the toluene moiety of the calcium alkyl toluene sulfonic acids or salts thereof contains no hydroxyl groups, and further wherein the alkyl moiety of the calcium alkyl toluene sulfonic acids or salts thereof is a C₁₂ to C₄₀ alkyl group; and

wherein the marine diesel cylinder lubricating oil composition has a TBN of about 55 to about 80.

2. The marine diesel cylinder lubricating oil composition of claim 1, wherein the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid are one or more calcium salts of an alkyl-substituted hydroxyaromatic carboxylic acid.

3. The marine diesel cylinder lubricating oil composition of claim 1, wherein the one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid are one or more calcium salts of an alkyl-substituted hydroxybenzoic carboxylic acid.

4. The marine diesel cylinder lubricating oil composition of claim 1, wherein the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid is a C₂₀ to C₂₈ alkyl group.

5. The marine diesel cylinder lubricating oil composition of claim 1, further comprising one or more marine diesel cylinder lubricating oil composition additives selected from the group consisting of an antioxidant, ashless dispersant, detergent, rust inhibitor, dehazing agent, demulsifying, agent, metal deactivating agent, friction modifier, pour point depressant, antifoaming agent, co-solvent, package compatibiliser, corrosion-inhibitor, dyes, extreme pressure agent and mixtures thereof.

6. The marine diesel cylinder lubricating oil composition of claim 1, which is substantially free of an unsulfurized tetrapropenyl phenol and its unsulfurized metal salt.

7. The marine diesel cylinder lubricating oil composition of claim 1, which is substantially free of any dispersants and/or zinc compounds.

10. The marine diesel cylinder lubricating oil composition of claim 1, having a TBN of from about 20 to about 100 and a kinematic viscosity ranging from about 12.5 to about 26.1 centistokes (cSt) at 100°

C.

12. The marine diesel cylinder lubricating oil composition of claim 1, wherein the alkyl moiety of the calcium alkyl toluene sulfonic acids or salts thereof is a C₂₀ to C₂₄ alkyl group.

8. A method for lubricating a marine two-stroke crosshead diesel engine with a marine diesel cylinder lubricant composition having improved high temperature detergency;

wherein the method comprises operating the engine with a marine diesel cylinder lubricating oil composition comprising;

(a) a major amount of one or more Group I basestocks, and

(b) a detergent composition comprising;

(i) about 5 to about 15 wt. % on an actives basis, based on the total weight of the marine diesel cylinder lubricating oil composition, of one or more alkaline earth metal salts of an alkyl-substituted hydroxyaromatic carboxylic acid having a total base number (TBN) of about 100 to about 250, wherein the alkyl-substituted moiety of the alkaline earth metal salt of an alkyl-substituted hydroxyaromatic carboxylic acid is a C₁₂ to C₂₈ alkyl group; and

(ii) about 5 to about 16 wt. % on an actives basis, based on the total weight of the marine diesel cylinder lubricating oil composition, of one or more high overbased calcium alkyl toluene sulfonic acids or salts thereof having a TBN of greater than 250 to about 550;

wherein the toluene moiety of the calcium alkyl toluene sulfonic acids or salts thereof contains no hydroxyl groups, and further wherein the alkyl moiety of the calcium alkyl toluene sulfonic acids or salts thereof is a C₁₇ to C₄₀ alkyl group; and

wherein the marine diesel cylinder lubricating oil composition has a TBN of about 55 to about 80.

9. The method of claim 8, wherein the marine diesel cylinder lubricating oil composition further comprises a marine diesel cylinder lubricating oil composition additive selected from the group consisting of an antioxidant, ashless dispersant, detergent, rust inhibitor, dehazing agent, demulsifying agent, metal deactivating agent, friction modifier, pour point depressant, antifoaming agent, co-solvent, package compatibilizer, corrosion-inhibitor, dyes, extreme pressure agent and mixtures thereof.

11. The method of claim 8, wherein the marine diesel cylinder lubricating oil composition has a TBN of from about 20 to about 100 and a kinematic viscosity ranging from about 12.5 to about 26.1 centistokes (cSt) at 100°

C.

13. The method of claim 8, wherein the alkyl moiety of the calcium alkyl toluene sulfonic acids or salts thereof is a C₂₀ to C₂₄ alkyl group.