Highly borated dispersant concentrates for lubricating oil compositions and methods for forming same

Patent metadata

Field	Value
Publication number	US-10487286-B2
Application number	US-201615161523-A
Country	US
Kind code	B2
Filing date	May 23, 2016
Priority date	May 23, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A process for producing a borated polyalkenyl succinimide dispersant composition in which the boron is incorporated primarily as cyclic metaboric acid moieties and the equivalents of boron incorporated per equivalent of nitrogen in the succinimide carrier is greater than 2; in which process a slurry of orthoboric acid is added to a polyalkenyl succinimide to form a reaction mixture, which reaction mixture is then heated under conditions (at a temperature and pressure and for a time) sufficient to remove from the reaction mixture from about 0.8 to about 1.2 moles of water of reaction per mole of boric acid charged.

First claim

What is claimed is:

1. A process for producing a borated polyalkenyl succinimide dispersant composition in which the boron is incorporated primarily as cyclic metaboric acid moieties and the equivalents of boron incorporated per equivalent of nitrogen in the succinimide carrier is greater than 2; said process comprising the steps of adding a slurry of orthoboric acid in a substantially non-protic hydrocarbon medium to a polyalkenyl succinimide in a substantially non-protic hydrocarbon medium to form a reaction mixture, and heating said reaction mixture under conditions sufficient to remove from the reaction mixture from about 0.8 to about 1.2 moles of water of reaction per mole of boric acid charged, wherein said polyalkenyl succinimide is derived from a reaction of a polyalkenyl succinic acylating agent derived from a polyalkene having a number average molecular weight (Mn) of from about 700 to about 1600 daltons and a polyamine or polyamine mixture having, or having on average, from about 5 to about 8 nitrogen atoms per molecule, the succinic to primary amine stoichiometric ratio of said polyalkenyl succinimide being no greater than about 1.3.

2. The process of claim 1 , wherein said polyalkene has a number average molecular weight (Mn) of from about 700 to about 1400 daltons.

3. The process of claim 2 , wherein said polyalkene has a number average molecular weight (Mn) of from about 800 to about 1250 daltons.

4. The process of claim 1 , wherein said polyamine or polyamine mixture has, or has on average, from about 6 to about 7 nitrogen atoms per molecule.

5. The process of claim 1 , wherein said polyalkenyl succinimide has a succinic to primary amine stoichiometric ratio of from about 0.8 to about 1.3.

6. The process of claim 5 , wherein said polyalkenyl succinimide has a succinic to primary amine stoichiometric ratio of from about 0.9 to about 1.12.

7. The process of claim 6 , wherein said polyalkenyl succinimide has a succinic to primary amine stoichiometric ratio of from about 0.9 to about 1.1.

8. The process of claim 1 , wherein said polyalkenyl succinic acylating agent from which said polyalkenyl succinimide is derived has a functionality of from about 0.8 to about 1.8.

9. The process of claim 1 , wherein said polyalkenyl succinic acylating agent from which said polyalkenyl succinimide is derived has a functionality of from about 1.1 to about 1.6.

10. The process of claim 1 , wherein said slurry of orthoboric acid is added to said polyalkenyl succinimide in an amount resulting in a boron to nitrogen molar ratio of from about 2:1 to about 5:1.

11. The process of claim 10 , wherein said slurry of orthoboric acid is added to said polyalkenyl succinimide in an amount resulting in a boron to nitrogen molar ratio of from about 2.5:1 to about 3.5:1.

12. The process of claim 1 , wherein said reaction mixture is heated under conditions sufficient to remove from the reaction mixture from about 0.9 to about 1.1 moles of water of reaction per mole of boric acid charged.

13. The process of claim 12 , wherein said reaction mixture is heated under conditions sufficient to remove from the reaction mixture about 1.0 moles of water of reaction per mole of boric acid charged.

14. The process of claim 1 , wherein said reaction mixture is heated to a temperature in the range of from about 125° C. to about 200° C. for about 1 to about 5 hours.

15. A borated polyalkenyl succinimide dispersant composition formed by the process of claim 1 .

16. A borated polyalkenyl succinimide dispersant composition formed by the process of claim 10 .

17. A borated polyalkenyl succinimide dispersant composition formed by the process of claim 12 .

18. A borated polyalkenyl succinimide dispersant composition formed by the process of claim 14 .

19. A borated polyalkenyl succinimide dispersant composition comprising polyalkenyl succinimide is derived from a reaction of a polyalkenyl succinic acylating agent derived from a polyalkene having a number average molecular weight (Mn) of from about 700 to about 1600 daltons and a polyamine or polyamine mixture having, or having on average, from about 5 to about 8 nitrogen atoms per molecule, and a succinic to primary amine stoichiometric ratio of no greater than about 1.3, wherein said polyalkenyl succinimide dispersant has associated therewith, boron, wherein said the boron is associated primarily as cyclic metaboric acid moieties and the equivalents of boron incorporated per equivalent of nitrogen in the succinimide dispersant is greater than about 2.

20. The borated polyalkenyl succinimide dispersant composition of claim 19 , wherein said polyalkene has a number average molecular weight (Mn) of from about 700 to about 1400 daltons.

21. The borated polyalkenyl succinimide dispersant composition of claim 20 , wherein said polyalkene has a number average molecular weight (Mn) of from about 800 to about 1250 daltons.

22. The borated polyalkenyl succinimide dispersant composition of claim 19 , wherein said polyamine or polyamine mixture has, or has on average, from about 6 to about 7 nitrogen atoms per molecule.

23. The borated polyalkenyl succinimide dispersant composition of claim 19 , wherein said polyalkenyl succinimide has a succinic to primary amine stoichiometric ratio of from about 0.8 to about 1.3.

24. The borated polyalkenyl succinimide dispersant composition of claim 23 , wherein said polyalkenyl succinimide has a succinic to primary amine stoichiometric ratio of from about 0.9 to about 1.12.

25. The borated polyalkenyl succinimide dispersant composition of claim 24 , wherein said polyalkenyl succinimide has a succinic to primary amine stoichiometric ratio of from about 0.9 to about 1.1.

26. The borated polyalkenyl succinimide dispersant composition of claim 19 , wherein said polyalkenyl succinic acylating agent from which said polyalkenyl succinimide is derived has a functionality of from about 0.8 to about 1.8.

27. The borated polyalkenyl succinimide dispersant composition of claim 26 , wherein said polyalkenyl succinic acylating agent from which said polyalkenyl succinimide is derived has a functionality of from about 1.1 to about 1.6.

28. A borated polyalkenyl succinimide dispersant composition of claim 19 , having a molar ratio of boron to nitrogen of from about 2.1:1 to about 5.0:1.

29. A borated polyalkenyl succinimide dispersant composition of claim 28 , having a molar ratio of boron to nitrogen of from about 2.2:1 to about 4.0:1.

30. A borated polyalkenyl succinimide dispersant composition of claim 29 , having a molar ratio of boron to nitrogen of from about 2.5:1 to about 3.5:1.

31. A borated polyalkenyl succinimide dispersant composition of claim 19 , having a boron content of from about 1.0 mass % to about 5.0 mass %©, based on the total mass of the composition.

32. A borated polyalkenyl succinimide dispersant composition of claim 31 , having a boron content of from about 1.5 mass % to about 4.0 mass %, based on the total mass of the composition.

33. A borated polyalkenyl succinimide dispersant composition of claim 32 , having a boron content of from about 2.0 mass % to about 3.0 mass %, based on the total mass of the composition.

34. A borated polyalkenyl succinimide dispersant composition of claim 19 , having a sediment conten

Assignees

• Infineum Int Ltd

Inventors

• Meads Marc W
• Emert Jacob
• Hua Jun

Classifications

• C07F5/05

  Cyclic compounds having at least one ring containing boron but no carbon in the ring · CPC title

• C10N2060/14

  by boron or a compound containing boron · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2030/70

  Soluble oils · CPC title

• C10N2030/44

  Boron free or low content boron compositions · CPC title