Metal detergents

Patent metadata

Field	Value
Publication number	US-9688939-B1
Application number	US-201615006219-A
Country	US
Kind code	B1
Filing date	Jan 26, 2016
Priority date	Jan 26, 2016
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Sulfurized calcium phenate detergents having a reduced unsulfurized alkyl-substituted phenol content are made by:
(A) providing, made from an unsulfurized alkyl-substituted phenol, a sulfurized calcium phenate detergent that, optionally, may have been further reacted with carbon dioxide; (B) adding to the detergent from 1 to 100 mass %, based on the mass of the detergent, of an organic solvent that has a boiling point of above 100° C. and below the boiling point of the unsulfurized alkyl-substituted phenol; and (C) removing the organic solvent from the detergent thereby to reduce the unsulfurized alkyl-substituted phenol content.

First claim

The invention claimed is:

1. A process for preparing a sulfurized calcium phenate detergent having a reduced content of unsulfurized alkyl-substituted phenol comprising the steps of:
(A) providing, made from an unsulfurized alkyl-substituted phenol, a sulfurized calcium phenate detergent that, optionally, may have been further reacted with carbon dioxide;
(B) adding to the detergent from 1 to 100 mass %, based on the mass of the detergent, of an organic solvent that has a boiling point of above 100° C. and below the boiling point of the unsulfurized alkyl-substituted phenol; and
(C) distilling the solvent from the detergent thereby to reduce the content of the unsulfurized alkyl-substituted phenol.

2. The process of claim 1 where the organic solvent is an alkanol or an aromatic solvent.

3. The process of claim 1 where the organic solvent is isodecanol.

4. The process of claim 1 where the phenol is tetrapropenylphenol.

5. The process of claim 1 wherein, after step (B) and before step (C), base oil is added.

6. The process of claim 1 where steps (B) and (C) are carried out in a sequence of repeated steps.

7. The process of claim 1 where steps (B) and (C) are each carried out singly.

8. The process of claim 1 where phenolic functional groups in the product of step (C) are oxyalkylated.

9. The process of claim 8 where oxyalkylation is carried out by reaction with ethylene carbonate, propylene carbonate or butylene carbonate.

10. A sulfurized calcium phenate detergent obtained by the process of claim 1 .

11. A lubricating oil composition comprising, or made by mixing, an oil of lubricating viscosity in a major amount and a detergent as claimed in claim 10 .

12. The process of claim 1 , wherein, in step (B), said organic solvent is added to said detergent in an amount of from 5 to 40 mass %, based on the mass of the detergent.

13. The process of claim 12 , wherein said organic solvent is added to said detergent in an amount of from 5 to 30 mass %, based on the mass of the detergent.

Assignees

• Infineum Int Ltd

Inventors

• Schwaebisch Dirk
• Musmacher Jamie
• Cant Alastair A

Classifications

• C10N2040/255

  Gasoline engines · CPC title

• C10N2040/252

  Diesel engines · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2030/04

  Detergent property or dispersant property · CPC title

• C10N2010/04

  Groups 2 or 12 · CPC title