Lubricating composition containing a detergent

Patent metadata

Field	Value
Publication number	US-10077413-B2
Application number	US-201414910934-A
Country	US
Kind code	B2
Filing date	Aug 11, 2014
Priority date	Aug 15, 2013
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

The invention provides a process to prepare a detergent in the presence of a polyether compound. The invention further provides for a lubricating composition containing the detergent. The invention further relates to the use of the lubricating composition in a mechanical device such as an internal combustion engine.

First claim

What is claimed is:

1. A method of lubricating an internal combustion engine comprising supplying to the internal combustion engine a lubricating composition comprising an oil of lubricating viscosity and a product obtained by at least one of:
(a) A process for preparing a metal-containing detergent that has incorporated into it a polyether compound, the process comprising the steps of:
(i) Forming/providing a detergent substrate in the presence of a polyether compound; and
(ii) Neutralising the detergent substrate of step (i) with a metal-containing base to form a neutral metal-containing detergent soap,

or
(b) A process for preparing a metal-containing detergent that has incorporated into it a polyether compound, the process comprising the steps of:
(i) Forming/providing a detergent substrate;
(ii) Contacting the detergent substrate of step (i) with a polyether compound; thereafter neutralizing the detergent substrate with a metal-containing base to form a neutral metal-containing detergent soap,

or
(c) A process for preparing a metal-containing detergent that has incorporated into it a polyether compound, the process comprising the steps of:
(i) Forming/providing a detergent substrate; and
(ii) Neutralising the detergent substrate of step (i) with a metal-containing base in the presence of a polyether compound to form a neutral metal-containing detergent soap, with the proviso that at least 50 mol % of the polyether compound is added before 75% of neutralizing is complete
wherein polyether compound has a number average molecular weight of 1400 to 7000 Daltons and wherein the detergent substrate comprises a hydrocarbyl-substituted phenol, or a sulphur-bridged alkyl phenol, or a methylene coupled alkyl phenol forming a phenate detergent, wherein the weight ratio of the detergent substrate to polyether varies from 1.32 to 3.4 and wherein the product is present in the range of 0.01 to 8 wt % of the lubricating composition.

2. The method of claim 1 , wherein the process further comprises the step of (iii) overbasing the neutral metal-containing detergent soap to form an overbased detergent.

3. The method of claim 1 , wherein the metal-containing base is a hydroxide or oxide of the metal.

4. The method of claim 1 , wherein the metal of the metal-containing base is an alkali metal or alkaline earth metal.

5. The method of claim 4 , wherein the metal is calcium or magnesium.

6. The method of claim 5 , wherein the metal-containing base is calcium hydroxide, calcium oxide, or mixtures thereof.

7. The method of claim 1 , wherein the polyether compound is a polyalkylene oxide or derivative thereof.

8. The method of claim 1 , wherein the polyether compound is hydroxyl-terminated.

9. The method of claim 1 , wherein the polyether compound is a C1-C8 monocapped polyalkylene oxide selected from the following compositions:
(i) 0 wt % to 40 wt % ethylene oxide (or ethylene glycol); and 60 wt % to 100 wt % propylene oxide (propylene glycol);
(ii) 0 wt % to 20 wt % ethylene oxide (or ethylene glycol); and 80 wt % to 100 wt % propylene oxide (propylene glycol);
(iii) 0 wt % to 10 wt % ethylene oxide (or ethylene glycol); and 90 wt % to 100 wt % propylene oxide (propylene glycol);
(iv) 100 wt % propylene oxide (propylene glycol); and
(v) a block A-B-A type copolymer comprising 25 wt % to 40 wt % propylene oxide (or propylene glycol); 20 wt % to 50 wt % ethylene oxide (or ethylene glycol); and 25 wt % to 40 wt % propylene oxide (or propylene glycol).

10. The method of claim 1 , wherein when the metal-containing detergent is a sulphonate, and the weight ratio of the polyether to detergent substrate varies from 1:50 to 5:2.

11. A method of lubricating an internal combustion engine comprising supplying to the internal combustion engine a lubricating composition comprising an oil of lubricating viscosity and a metal-containing detergent that has incorporated into it a polyether compound, obtained by the process comprising the steps of:
(i) Forming/providing a detergent substrate;
(ii) Neutralizing the detergent substrate of step (i) with a metal-containing base to form a neutral metal-containing detergent soap; and
(iii) overbasing the neutral metal-containing detergent soap of step (ii) to form an overbased detergent, in the presence of a polyether compound, with the proviso that at least 50 mol % of the polyether compound is added before 75% of overbasing is complete
wherein polyether compound has a number average molecular weight of 1400 to 7000 Daltons and wherein the detergent substrate comprises a hydrocarbyl-substituted phenol, or a sulphur-bridged alkyl phenol, or a methylene coupled alkyl phenol forming a phenate detergent, wherein the weight ratio of the detergent substrate to polyether varies from 1.32 to 3.4 and wherein the product is present in the range of 0.01 to 8 wt % of the lubricating composition.

12. The method of claim 11 , wherein the metal of the metal-containing base is an alkali metal or alkaline earth metal.

13. The method of claim 12 , wherein the metal is calcium or magnesium.

14. The method of claim 13 , wherein the metal-containing base is calcium hydroxide, calcium oxide, or mixtures thereof.

15. The method of claim 11 , wherein the polyether compound is a polyalkylene oxide or derivative thereof.

16. The method of claim 15 , wherein the polyether compound is hydroxyl-terminated.

Assignees

• Lubrizol Corp

Inventors

• Walker Gary M
• Delbridge Ewan E
• Zhang Yanshi
• Sampler Edward P
• Cook Stephen J
• Friend Christopher L
• Fahmy Mohamed G

Classifications

• C10M129/10

  having hydroxy groups bound to a carbon atom of a six-membered aromatic ring · CPC title

• C10M2207/028

  Overbased salts thereof · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10M2207/024

  having at least two phenol groups but no condensed ring · CPC title

• C10N2030/12

  Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives · CPC title