Lubricant composition with improved solvency

• US 20070138053A1
• Filed: 12/12/2006
• Published: 06/21/2007
• Est. Priority Date: 12/15/2005
• Status: Active Grant

• Current Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Original Assignee: ExxonMobil Research & Engineering Company (Exxon Mobil Corporation)
• Inventors: Baillargeon, David
• Granted Patent: US 8,318,002 B2
• Time in Patent Office: Days
• US Class Current: 208/19
• CPC Class Codes: C10M 111/02 at least one of them being a non-macromolecular organic compound
• CPC Class Codes: C10M 111/04 at least one of them being a macromolecular organic compound
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2203/1085 used as base material
• CPC Class Codes: C10M 2205/0285 used as base material
• CPC Class Codes: C10M 2205/173 used as base material
• CPC Class Codes: C10N 2020/02 Viscosity; Viscosity index
• CPC Class Codes: C10N 2030/00 Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives

Abstract

Lubricating base oils/base stocks comprising one or more hydrodewaxate and/or hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s) or mixture thereof, preferably GTL base stock(s) and/or base oil(s) of improved solvency comprise said base stock combined with a Group I base stock/base oil selected from the group consisting of high viscosity Group I mineral oil, preferably Bright Stock. The solvency and the capability to solubilize performance additives of base oils comprising one or more hydrodewaxate and/or hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s)and/or base oil(s) or mixture thereof, preferably GTL base stock(s) and/or base oil(s) is improved by the addition to said base oils of a Group I base oil/base stock selected from the group consisting of high viscosity Group I mineral oil, preferably Bright Stock.

Claims

1. A method for improving the solvency and the capacity to solubilize performance additives of base oil(s) comprising one or more hydrodewaxate and/or hydroisomerate base stock(s) and base oil(s), hydroisomerate base stock(s) and base oil(s), GTL base stock(s) and base oil(s), and mixtures said base oil(s) having a kinematic viscosity at 100°

C. of 30 mm²/s to 50 mm²/s by addition to the base oil of a high viscosity Group I mineral oil, the high viscosity Group I mineral oil being characterized as having a kinematic viscosity at 100°

C. of about 12 mm²/s and the high viscosity Group I mineral oil being added to the base oil in an amount ranging from about 1 to about 55 wt % high viscosity Group I mineral oil based on the total weight of the mixture of the one or more hydrodewaxate base stock(s), hydroisomerate base stock(s), GTL base stock(s) or mixture thereof and the high viscosity Group I mineral oil.

2. The method of claim 1 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 18 mm²/s and higher.

3. The method of claim 1 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 24 mm²/s and higher.

4. The method of claim 1 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 28 mm²/s and higher.

5. The method of claim 1, 2, 3 or 4 wherein the high viscosity Group I mineral oil has a density at 60°

C. in the range of about 0.8885 to 0.920 g/cm³ and a VI in the range of about 90 to 100.

6. The method of claim 1, 2, 3 or 4 wherein the high viscosity Group I mineral oil is added to the base oil comprising one or more hydrodewaxate base stock(s) and base oil(s), hydroisomerate base stock(s) and base oil(s), GTL base stock(s) and base oil(s), or mixtures thereof in an amount in the range of about 5 to 55 wt % high viscosity Group I mineral oil based on the total weight of the mixture.

7. The method of claim 1, 2, 3 or 4 wherein the high viscosity Group I mineral oil is added to the base oil comprising one or more hydrodewaxate base stock(s) and base oil(s), hydroisomerate base stock(s) and base oil(s), GTL base stock(s) and base oil(s), or mixture thereof in an amount in the range of about 10 to 55 wt % high viscosity Group I mineral oil based on the total weight of the mixture.

8. The method of claim 5 wherein the high viscosity Group I mineral oil is added to the base oil comprising one or more hydrodewaxate base stock(s) and base oil(s), hydroisomerate base stock(s) and base oil(s), GTL base stock(s) and base oil(s), or mixtures thereof in an amount in the range of about 5 to 55 wt % high viscosity Group I mineral oil based on the total weight of the mixture.

9. The method of claim 5 wherein the high viscosity Group I mineral oil is added to the base oil comprising one or more hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixtures thereof in an amount in the range of about 10 to 55 wt % high viscosity Group I mineral oil based on the total weight of the mixture.

10. The method of claim 1, 2, 3 or 4 wherein the base oil has a kinematic viscosity at 100°

C. of about 3.5 mm²/s to about 30 mm²/s.

11. The method of claim 5 wherein the base oil has a kinematic viscosity at 100°

C. of about 3.5 mm²/s to about 30 mm²/s.

12. The method of claim 8 wherein the base oil has a kinematic viscosity at 100°

C. of about 3.5 mm²/s to about 30 mm²/s.

13. The method of claim 1, 2, 3 or 4 wherein the base oil is a GTL material hydrodewaxate or hydroisomerate.

14. The method of claim 1, 2, 3 or 4 wherein the base oil is a Fischer-Tropsch material hydrodewaxate or hydroisomerate.

27. The lubricating oil formulation of claim 2, 24, 25 or 26 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 18 mm²/s and higher.

28. The lubricating oil formulation of claim 27 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 24 mm²/s and higher.

29. The lubricating oil formulation of claim 28 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 28 mm²/s and higher.

15. A lubricating oil stock of improved solvency comprising a base oil comprising one or more hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixtures thereof and 1 to 55 wt % of a high viscosity Group I mineral oil, said Group I mineral oil being characterized as having a kinematic viscosity@100°

C. of about 12 mm²/s and higher.

16. The lubricating oil stock of claim 15 wherein the base oil has a kinematic viscosity at 100°

C. of about 3.5 mm²/s to about 30 mm²/s.

17. The lubricating oil stock of claim 15 wherein the base oil is a GTL material hydrodewaxate or hydroisomerate.

18. The lubricating oil stock of claim 15 wherein the base oil is a Fischer-Tropsch material hydrodewaxate or hydroisomerate.

19. The lubricating oil stock of claim 15, 16, 17 or 18 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 18 mm²/s and higher.

20. The lubricating oil stock of claim 19 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 24 mm²/s and higher.

21. The lubricating oil stock of claim 20 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 28 mm²/s and higher.

22. The lubricating oil stock of claim 15, 16, 17 or 18 wherein the high viscosity Group I mineral oil has a density at 60°

F. in the range of about 0.885 to 0.920 g/cm³ and a VI in the range of about 90 to 100.

23. A lubricating oil formulation comprising a base oil/base stock comprising one or more hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixture thereof having a kinematic viscosity at 100°

C. of 3 mm^2//s to 50 mm²/s, a high viscosity Group I mineral oil stock having a kinematic viscosity at 100°

C. of about 12 mm²/s present in an amount in the range of 1 to 55 wt % based on the total weight of the one or more hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixture thereof and the high viscosity Group I mineral oil, and an additive amount of at least one performance additive.

24. The lubricating oil formulation of claim 23 wherein the base oil has a kinematic viscosity at 100°

C. of about 3.5 mm²/s to about 30 mm²/s.

25. The lubricating oil formulation of claim 23 wherein the base oil is a GTL material hydrodewaxate or hydroisomerate.

26. The lubricating oil formulation of claim 23 wherein the base oil is a Fischer-Tropsch material hydrodewaxate or hydroisomerate.

30. The lubricating oil formulation of claim 23, 24, 25 or 26 wherein the high viscosity Group I mineral oil has a density at 60°

F. in the range of about 0.885 to 0.920 g/cm³ and a VI in the range of about 90 to 100.

31. A lubricating oil additive concentrate comprising at least one performance additive in a dissolving quantity of a lubricating oil stock comprising a base oil comprising one or more of hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixture thereof having a kinematic viscosity at 100°

C. of 3 mm²/s to 50 mm²/s and a high viscosity Group I stock having a kinematic viscosity at 100°

C. of about 12 mm²/s said high viscosity Group I mineral oil being present in an amount in the range of 1 to 55 wt % based on the total weight of the one or more hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixture thereof and the high viscosity Group I mineral oil.

32. The lubricating oil additive concentrate of claim 31 wherein the base oil comprising one or more hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixture thereof has a kinematic viscosity at 100°

C. of about 3.5 mm²/s to about 30 mm²/s.

33. The lubricating oil additive concentrate of claim 31 wherein the base oil comprising one or more hydrodewaxate base stock(s) and/or base oil(s), hydroisomerate base stock(s) and/or base oil(s), GTL base stock(s) and/or base oil(s), or mixture thereof is a GTL material isomerate.

34. The lubricating oil additive concentrate of claim 33 wherein the base oil is a Fischer-Tropsch material hydrodewaxate or hydroisomerate.

35. The lubricating oil additive concentrate of claim 31, 32, 33 or 34 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 18 mm²/s and higher.

36. The lubricating oil additive concentrate of claim 35 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 24 mm²/s and higher.

37. The lubricating oil additive concentrate of claim 36 wherein the high viscosity Group I mineral oil has a kinematic viscosity at 100°

C. of about 28 mm²/s and higher.

38. The lubricating oil additive concentrate of claim 37 wherein the high viscosity Group I mineral oil has a density at 60°

F. in the range of about 0.885 to 0.920 g/cm³ and a VI in the range of about 90 to 100.