Claims
- 1. A process for overbasing a substrate comprising mixing a composition comprising said substrate, water, a phenol containing up to 3 aliphatic carbon atoms, a source of magnesium and a carbonating agent, under reaction conditions to form a magnesium overbased substrate, said water being substantially retained in said composition throughout the overbasing reaction, the weight ratio of water to magnesium being about 10:1 to about 1:5.
- 2. The process of claim 1 wherein said substrate is selected from the group consisting of at least one salicylic acid, carboxylic acid, sulfonic acid, succinic acid or alkyl phenol.
- 3. The process of claim 1 wherein said composition is characterized by the substantial absence of a copromoter.
- 4. The process of claim 1 wherein said substrate is a substituted aromatic sulfonic acid.
- 5. The process of claim 1 wherein said phenol comprises phenol per se.
- 6. The process of claim 1 wherein said substrate comprises an alkyl aromatic sulfonic acid.
- 7. The process of claim 1 wherein said phenol is substantially separated from said magnesium overbased substrate.
- 8. The process of claim 1 wherein said carbonating agent comprises carbon dioxide and the temperature of said composition is maintained at less than about 90.degree. C. during said process.
- 9. The process of claim 1 wherein said substrate comprises at least one alkyl-substituted aromatic sulfonic acid containing from about 16 to about 40 carbon atoms in the alkyl portion.
- 10. The process of claim 1 wherein said composition is maintained at a temperature in the range of about 25.degree. C. to about 79.degree. C. during said process.
- 11. The process of claim 1 wherein said composition further comprises at least one hydrocarbon solvent.
- 12. The process of claim 1 which wherein said composition is free of ammonia, alkanolamines, lower carboxylic acids or salts thereof, and polyamines.
- 13. The process of claim 1 wherein the metal ratio of said magnesium to said substrate is about 10:1 to about 30:1.
- 14. The process of claim 1 wherein said composition is characterized by the substantial absence of an aliphatic alcohol.
- 15. The process of claim 1 wherein said source of magnesium is magnesium oxide.
- 16. The process of claim 1 wherein said substrate comprises at least one alkyl phenol.
- 17. The process of claim 1 wherein the weight ratio of said phenol to said magnesium is about 3:4 to about 1:10.
- 18. The process of claim 1 wherein the amount of phenol in said composition is less than the amount that is sufficient to convert substantially all of the magnesium in said composition to magnesium phenate.
- 19. The process of claim 1 wherein said phenol contains from 1 to 3 aliphatic carbon atoms.
- 20. The process of claim 1 wherein said composition further comprises at least one phenol which is halogenated, or at least one phenol which is sulfur or formaldehyde coupled.
- 21. The process of claim 1 wherein said composition further comprises at least one hydrocarbon solvent, said hydrocarbon solvent being selected from the group consisting of pentane, hexane, heptane and mixtures thereof.
- 22. The process of claim 1 wherein said substrate comprises at least one alkylated phenol, the equivalent ratio of said phenol to said alkylated phenol being about 30:1 to about 2:1.
Parent Case Info
This is a continuation of co-pending application Ser. No. 07/209,250 filed on June 20, 1988 now abandoned which in turn is a continuation of Ser. No. 07/080,286 filed on July 30, 1987 now U.S. Pat. No. 4,775,490.
US Referenced Citations (27)
Foreign Referenced Citations (7)
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WO80018660 |
Jan 1980 |
WPX |
1142373 |
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GBX |
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Aug 1970 |
GBX |
1570909 |
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Continuations (2)
|
Number |
Date |
Country |
Parent |
209250 |
Jun 1988 |
|
Parent |
80286 |
Jul 1987 |
|