US4238410A
Expired / Lapsed
US
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Process for producing magnesium salt of olefin sulfonic acid
Assignee: Lion Fat and Oil Co Ltd
•
Filing: 1978-05-11
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Granted: 1980-12-09
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Expires: 1998-05-11
Abstract
Abstract Disclosed is a process for producing the magnesium salt of an olefin sulfonic acid comprising the steps of: sulfonating and neutralizing an olefin having 10 to 20 carbon atoms, and; then, hydrolyzing sultone contained in the resulting neutralization product in the presence of, (a) magnesium hydroxide, magnesium oxide and a mixture thereof and (b) an additive selected from the group consisting of benzoic acid, citric acid, malic acid, phosphoric acid, polyphosphoric acid and water-soluble salts thereof, at a temperature within the range of from 110° C. to 180° C.
Inventors
- 👤 Akira Kawakami
- 👤 Haruo Ohkouchi
- 👤 Yoshio Aoki
- 👤 Kyozo Kitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:17
CPC Classifications
C; C07; C07C; C07C309/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
In a process for producing the magnesium salt of an olefin sulfonic acid in an aqueous medium comprising the steps of: sulfonating and neutralizing an olefin having 10 to 20 carbon atoms, and; then heating the resulting neutralization product in the presence of magnesium hydroxide, magnesium oxide or a mixture thereof to thereby hydrolyze sultone present in the neutralization product; the improvement wherein the hydrolysis of the sultone is carried out in the presence of at least one additive selected from the group consisting of benzoic acid, citric acid, malic acid, and water-soluble salts thereof, at a temperature within the range of from 110° C. to 180° C.
Claim 2
Dependent Claim
108 words
In a process for producing the magnesium salt of an olefin sulfonic acid in an aqueous medium comprising the steps of: sulfonating and neutralizing an olefin having 10 to 20 carbon atoms, and; then heating the resulting neutralization product in the presence of magnesium hydroxide, magnesium oxide or a mixture thereof to thereby hydrolyze sultone present in the neutralization product; the improvement wherein the hydrolysis of the sultone is carried out in the presence of at least one additive selected from the group consisting of benzoic acid, citric acid, malic acid, and water-soluble salts thereof, at a temperature within the range of from 110° C. to 180° C.
Claim 3
Dependent Claim
21 words
The process as claimed in claim 1, wherein the olefin is sulfonated with gaseous sulfur trioxide diluted by an inert gas.
Claim 4
Dependent Claim
25 words
The process as claimed in claim 1, wherein the sulfonation product of the olefin is neutralized with magnesium hydroxide, magnesium oxide or a mixture thereof.
Claim 5
Dependent Claim
35 words
The process as claimed in claim 1, wherein the amount of the additive is not less than 0.5% weight, based on the weight of the magnesium salt of the olefin sulfonic acid to be produced.
Claim 6
Dependent Claim
40 words
The process as claimed in claim 4, wherein the amount of the additive is within the range of from 1 to 10% by weight, based on the weight of the magnesium salt of the olefin sulfonic acid to be produced.
References Cited (Backward Citations)
US2511043A
Cited
US4146551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |