Lubricating oil composition

Patent metadata

Field	Value
Publication number	US-10160927-B2
Application number	US-201515536166-A
Country	US
Kind code	B2
Filing date	Dec 14, 2015
Priority date	Dec 17, 2014
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

Lubricating composition comprising (i) base oil and (ii) a Verkade base compound having the formula (1): wherein R 1 , R 2 and R 3 are each independently selected from hydrogen and saturated or unsaturated, straight chain or branched, C 1 -C 22 alkyl groups. The lubricating composition of the present invention exhibits improved base number retention and oxidative stability, particularly in the presence of a biofuel such as fatty acid alkyl ester.

First claim

That which is claimed is:

1. A lubricating composition comprising (I) base oil and (ii) compound having the formula (1):

wherein R1, R2 and R3 are each independently selected from hydrogen and saturated or unsaturated, straight chain or branched, C1-C22 alkyl groups.

2. The lubricating composition according to claim 1 wherein R1, R2 and R3 are each independently selected from saturated or unsaturated, straight chain or branched, C3-C12 alkyl groups.

3. The lubricating composition according to claim 1 wherein R1, R2 and R3 are each independently selected from saturated or unsaturated, branched chain C3-C12 alkyl groups.

4. The lubricating composition according to claim 1 wherein R1, R2 and R3 are each independently selected from saturated, branched chain C3-C12 alkyl groups.

5. The lubricating composition according to claim 1 wherein R1, R2 and R3 are each independently selected from saturated, branched chain C3-C6 alkyl groups.

6. The lubricating composition according to claim 1 wherein R1, R2 and R3 are the same.

7. The lubricating composition according to claim 6 wherein R1, R2 and R3 are saturated, branched chain C3 or C4 alkyl groups.

8. The lubricating composition according to claim 1 wherein the compound of formula (1) is present at a level of from 0.01 wt % to 5 wt %.

9. The lubricating oil composition according to claim 1 wherein the lubricating oil composition is contaminated with at least 0.3 wt %, based on the total weight of the lubricating oil composition, of a biofuel or a decomposition product thereof, or a mixture thereof.

10. The lubricating composition according to claim 1 wherein the base oil comprises a Fischer-Tropsch derived base oil.

11. The lubricating composition according to claim 1 additionally comprising a performance additive.

12. The lubricating composition according to claim 1 wherein the lubricating composition is a heavy-duty diesel engine oil.

13. A method for improving the base number retention of a lubricating oil composition used for lubricating a crankcase of an internal combustion engine fueled with a biofuel composition, wherein the biofuel composition is a biodiesel composition comprising a fatty acid alkyl ester, wherein the method comprises adding to the lubricating oil composition a compound of formula (1):

wherein R1, R2 and R3 are each independently selected from hydrogen and saturated or unsaturated, straight chain or branched, C1-C22 alkyl groups.

14. The lubricating composition according to claim 1 wherein the compound of formula (1) is present at a level of from 0.1 wt % to 3 wt %, by weight of the lubricating composition.

15. The lubricating composition according to claim 1 wherein the compound of formula (1) is present at a level of from 0.1 to 1 wt %, by weight of the lubricating composition.

Assignees

• Shell Oil Co

Inventors

• Hellawell Alexander Mark Robert James
• Wilkinson Robert
• MASSELY Alexander Peter Dirk
• Moir Robert
• Browning Stuart
• Bown Richard Thomas
• Gullapalli Sravani

Classifications

• C10N2040/252

  Diesel engines · CPC title

• C10N2030/10

  Inhibition of oxidation, e.g. anti-oxidants · CPC title

• C10N2020/067

  Unsaturated Compounds · CPC title

• C10N2030/52

  Base number [TBN] · CPC title

• C10N2030/45

  Ash-less or low ash content · CPC title