Phenate detergent preparation

Patent metadata

Field	Value
Publication number	US-9550958-B2
Application number	US-201313916608-A
Country	US
Kind code	B2
Filing date	Jun 13, 2013
Priority date	Jun 13, 2012
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

A sulphurised calcium phenate detergent is made by (i) reacting hydrogenated distlled CNSL with a calcium salt and sulphur in the presence of a promoter and process solvent; (ii) reacting the product of (i) with additional calcium salt and promoter, and with a co-surfactant, and then carbonating; and optionally (iii) further carbonating the reaction mixture to obtain overbased sulphurised calcium phenate.

First claim

What is claimed is:

1. A method of making a sulphurised calcium phenate detergent comprising the steps of
(i) reacting one or more alkyl phenol materials comprising hydrogenated distilled cashew nut shell liquid with a calcium salt and sulphur in the presence of a promoter and of a process solvent to obtain a reaction mixture;
(ii) reacting the reaction mixture with additional amounts of calcium salt and promoter, and with a co-surfactant, and then subjecting the reaction mixture to carbonation; and optionally
(iii) further carbonating the reaction mixture to obtain overbased sulphurised calcium phenate;
wherein the co-surfactant is selected from a phenol or alkyl phenol or methylene bridged alkyl phenol; or a hydrocarbyl substituted anhydride or succinic anhydride.

2. The method of claim 1 , where the co-surfactant is present in the range of 1-20 mass %, based on the total mass of surfactant.

3. The method of claim 1 , where the co-surfactant is a polyisobutene succinic anhydride.

4. The method of claim 3 , wherein the co-surfactant is a polyisobutene succinic anhydride having a molecular weight of between 200 and 5000.

5. The method of claim 1 , where the alkylphenol material in (i) comprises 3-pentadecylphenol.

6. A sulphurised calcium phenate detergent obtained by the method of claim 1 .

7. A method for improving the oxidation stability and deposit control properties of a lubricating oil composition comprising the addition of a co-surfactant selected from a phenol, an alkyl phenol, a methylene bridged alkyl phenol, or a hydrocarbyl substituted anhydride or succinic anhydride in a detergent of claim 5 , and adding such a detergent, as an additive, to said lubricating oil composition.

8. A lubricating oil composition comprising, in a major amount, an oil of lubricating viscosity and, in a minor amount, a detergent of claim 5 .

9. The lubricating oil composition of claim 8 , where the oil of lubricating viscosity contains 50 mass % or more of a basestock containing greater than or equal to 90% saturates and less than or equal to 0.03% sulphur or a mixture thereof.

10. The lubricating oil composition of claim 8 , comprising a marine diesel cylinder lubricant.

11. The lubricating oil composition of claim 8 , comprising a trunk piston engine oil.

12. A method of operating an internal combustion engine comprising fuelling the engine and lubricating the engine with the lubricating oil composition of claim 8 .

Assignees

• Infineum Int Ltd

Inventors

• Marsh Adam P
• Schwaebisch Dirk
• Delamore Oliver J

Classifications

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10N2070/00

  Specific manufacturing methods for lubricant compositions · CPC title

• C10N2030/70

  Soluble oils · CPC title

• C10N2020/04

  Molecular weight; Molecular weight distribution · CPC title

• C10N2030/10

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