ADDITIVES AND LUBRICANT FORMULATIONS FOR IMPROVED CATALYST PERFORMANCE

• US 20080280796A1
• Filed: 09/17/2007
• Published: 11/13/2008
• Est. Priority Date: 05/08/2007
• Status: Active Grant

• Current Assignee: Afton Chemical Corporation (Newmarket Corporation)
• Original Assignee: Afton Chemical Corporation (Newmarket Corporation)
• Inventors: Loper, John T., GUINTHER, Gregory H.
• Granted Patent: US 8,048,834 B2
• Time in Patent Office: Days
• US Class Current: 508/539
• CPC Class Codes: C10M 129/40 monocarboxylic
• CPC Class Codes: C10M 141/12 at least one of them being an organic compound containing atoms of elements not provided for in groups C10M141/02 - C10M141/10
• CPC Class Codes: C10M 2207/126 monocarboxylic
• CPC Class Codes: C10M 2223/045 Metal containing thio derivatives
• CPC Class Codes: C10N 2010/04 Groups 2 or 12
• CPC Class Codes: C10N 2010/08 Groups 4 or 14
• CPC Class Codes: C10N 2030/30 Anti-misting
• CPC Class Codes: C10N 2030/38 Catalyst protection, e.g. in exhaust gas converters
• CPC Class Codes: C10N 2030/42 Phosphor free or low phosphor content compositions
• CPC Class Codes: C10N 2030/43 Sulfur free or low sulfur content compositions
• CPC Class Codes: C10N 2030/45 Ash-less or low ash content
• CPC Class Codes: C10N 2030/50 Emission or smoke controlling properties
• CPC Class Codes: C10N 2040/25 Internal-combustion engines
• CPC Class Codes: C10N 2040/252 Diesel engines
• CPC Class Codes: C10N 2060/14 by boron or a compound containing boron
• CPC Class Codes: F01N 11/00 Monitoring or diagnostic devices for exhaust-gas treatment apparatus , e.g. for catalytic activity safety, indicating or supervising devices for internal combustion engines F02B77/08; testing of machines G01M13/00

Abstract

A method and compositions for lubricating surfaces with lubricating oils exhibiting increased phosphorous retention. The lubricated surface includes a lubricant composition containing a base oil of lubricating viscosity, an amount of a phosphorus-containing compound and an amount of at least one hydrocarbon soluble titanium compound that is effective to provide an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x that is lower than an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x of the lubricant composition devoid of the hydrocarbon soluble titanium compound.

Claims

1. A lubricated surface of a device containing an exhaust catalyst, the surface comprising a lubricant composition including a base oil of lubricating viscosity, at least one phosphorus-containing compound, and an amount of at least one hydrocarbon soluble titanium compound that is effective to provide an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x that is lower than an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x of the lubricant composition devoid of the hydrocarbon soluble titanium compound.

2. The lubricated surface of claim 1, wherein the lubricated surface comprises an engine drive train.

3. The lubricated surface of claim 1, wherein the lubricated surface comprises an internal surface or component of an engine selected from the group consisting of internal combustion engines and compression ignition engines.

4. The lubricated surface of claim 1, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 50 to about 1000 ppm in the lubricant composition.

5. The lubricated surface of claim 1, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 100 to about 500 ppm in the lubricant composition.

6. The lubricated surface of claim 1, wherein the hydrocarbon soluble titanium compound comprises titanium neodecanoate.

7. A vehicle having moving parts and containing a lubricant for lubricating the moving parts, the lubricant comprising an oil of lubricating viscosity, at least one phosphorus-containing compound, and an amount of at least one hydrocarbon soluble titanium compound effective to provide an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x that is lower than an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x of the lubricant composition devoid of the hydrocarbon soluble titanium compound.

8. The vehicle of claim 7, wherein the hydrocarbon soluble titanium compound comprises titanium neodecanoate.

9. The vehicle of claim 7, wherein the moving parts comprise a heavy duty diesel engine.

10. The vehicle of claim 7, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 50 to about 1000 ppm in the lubricant composition.

11. The vehicle of claim 7, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 100 to about 500 ppm in the lubricant composition.

12. A fully formulated lubricant composition comprising a base oil component of lubricating viscosity, at least one phosphorus-containing compound, and an amount of hydrocarbon soluble titanium-containing agent effective to provide an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x that is lower than an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x of the lubricant composition devoid of the hydrocarbon soluble titanium-containing agent, wherein the titanium-containing agent is essentially devoid of sulfur and phosphorus atoms.

13. The lubricant composition of claim 12, wherein the lubricant composition comprises a low ash, low sulfur, and low phosphorus lubricant composition suitable for compression ignition engines.

14. The lubricant composition of claim 12, wherein the amount of hydrocarbon soluble titanium-containing agent provides from about 50 to about 1000 parts per million titanium in the lubricant composition.

15. The lubricant composition of claim 12, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 100 to about 500 ppm in the lubricant composition.

16. A method of reducing an aged exhaust catalyst temperature effective to convert at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x, comprising contacting the engine parts with a lubricant composition comprising a base oil of lubricating viscosity, at least one phosphorus-containing compound, and an amount of a hydrocarbon soluble titanium compound effective to provide an aged exhaust catalyst temperature that is lower than an aged exhaust catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x of the lubricant composition devoid of the hydrocarbon soluble titanium compound

17. The method of claim 16, wherein the engine comprises a heavy duty diesel engine.

18. The method of claim 16, wherein the hydrocarbon soluble titanium-containing agent comprises titanium neodecanoate.

19. The method of claim 16, wherein the amount of hydrocarbon soluble titanium-containing agent provides from about 50 to about 1000 parts per million titanium in the lubricant composition.

20. The method of claim 16, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 100 to about 500 ppm in the lubricant composition.

21. An additive concentrate for a lubricant composition used to lubricate an engine containing an exhaust catalyst, the additive concentrate comprising, at least one phosphorus-containing compound, and an amount of hydrocarbon soluble titanium-containing agent effective to provide an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x that is lower than an aged catalyst temperature that converts at least fifty percent of exhaust gas hydrocarbons, carbon monoxide, and NO_x of the lubricant composition devoid of the hydrocarbon soluble titanium-containing agent, wherein the titanium-containing agent is essentially devoid of sulfur and phosphorus atoms.

22. The concentrate of claim 21, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 50 to about 1000 ppm in the lubricant composition.

23. The concentrate of claim 21, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 100 to about 500 ppm in the lubricant composition.

24. The concentrate of claim 21, wherein the amount of hydrocarbon soluble titanium compound provides an amount of titanium ranging from about 50 to about 300 ppm in the lubricant composition.

25. The concentrate of claim 21, wherein the hydrocarbon soluble titanium compound comprises titanium neodecanoate.