US3609076A
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Method of preparing over-based alkaline earth sulfonates
Assignee: Standard Oil Co
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Filing: 1968-10-15
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Granted: 1971-09-28
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Expires: 1988-10-15
Abstract
Abstract Overbased, i.e., highly basic, alkaline earth sulfonates are prepared by reacting a preferentially oil-soluble sulfonic acid with a basic alkaline earth compound in the presence of small amounts of an ammonium salt of a C1 to C7 aliphatic acid.
Inventors
- 👤 Albert R Sabol
- 👤 Eli W Blaha
- 👤 Cecil G Brannen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:02
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
11 words
The process of claim 1 wherein (A) is an alkaryl sulfonate.
Claim 2
Dependent Claim
10 words
The process of clAim 1 wherein (E) is ammonium acetate.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein (B) is magnesium oxide.
Claim 4
Dependent Claim
34 words
The process of claim 1 wherein (A) is magnesium polybutenyl-benzene sulfonate in which the polybutenyl substituent has a molecular weight of at least about 200; (B) is magnesium oxide; and (E) is ammonium acetate.
Claim 5
Dependent Claim
33 words
The process of claim 1 wherein (A) is magnesium polypropenyl-benzene sulfonate in which the polypropenyl substituent has a molecular weight of at least 250; (B) is magnesium oxide; and (E) is ammonium acetate.
Claim 6
Dependent Claim
169 words
The process of preparing an overbased magnesium sulfonate comprising the steps of: I. reacting, in an inert hydrocarbon solvent, an oil-soluble alkyl-benzene sulfonic acid with a stoichiometric amount of magnesium oxide to form an oil-soluble neutral magnesium sulfonate in said solvent; II. forming in the solvent/sulfonate mixture of step (I) a reactant mixture consisting essentially of A. said neutral magnesium sulfonate, B. at least 0.5 mol of magnesium oxide per mol of (A), C. about 1-10 mol of water per mol of (B), D. about 5-20 mols of methanol per mol of (B), E. about 0.05-0.5 mol of ammonium acetate per mol of (B); III. passing carbon dioxide through the reactant mixture of step (II), at atmospheric pressure, at the rate of about 0.5-3 cubic feet of gaseous carbon dioxide per hour per mol of (A) at a temperature of about 40-175* F. for a time sufficient to convert said magnesium oxide to carbonate; and IV. recovering from the reaction mixture of step (III) said overbased alkaline earth sulfonate.
Claim 7
Dependent Claim
14 words
The process of claim 7 wherein said sulfonic acid is C60 polypropenyl-benzene sulfonic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |