US5153341A
Expired / Lapsed
US
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Process for preparing benzenesulfonate salts
Assignee: Clorox Co
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Filing: 1991-03-25
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Granted: 1992-10-06
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Expires: 2011-03-25
Abstract
Abstract An improved process for preparing alkanoyloxyacetyloxybenzenesulfonate salts in which phenyl esters of alkanoyloxyacetic acids (alkanoyloxyacetyloxybenzenes) are sulfonated to yield novel alkanoyloxyacetyloxybenzenesulfonic acids which, on neutralization, yield the corresponding alkanoyloxyacetyloxybenzenesulfonate salts.
Inventors
- 👤 Bijan Amini
- 👤 Donald J. Dumas
- 👤 George C. Sonnichsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/32; C07C309/00; C07C309/01; C07C309/28; C07C309/41; C07C309/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
An improved process for preparing alkanoyloxyacetyloxybenzenesulfonate salts of the general formula (I): RCO.sub.2 CH.sub.2 CO.sub.2 PhSO.sub.3 M (I) wherein R is a linear or branched chain C 5 -C 11 alkyl, and M is an alkali metal, an alkaline earth metal or an ammonium radical which comprises (1) sulfonating a phenyl ester of the alkanoyloxyacetic acid with a sulfonating agent to form the corresponding intermediate alkanoyloxyacetyloxybenzenesulfonic acid and (2) neutralizing the intermediate.
Claim 2
Dependent Claim
72 words
An improved process for preparing alkanoyloxyacetyloxybenzenesulfonate salts of the general formula (I): RCO.sub.2 CH.sub.2 CO.sub.2 PhSO.sub.3 M (I) wherein R is a linear or branched chain C 5 -C 11 alkyl, and M is an alkali metal, an alkaline earth metal or an ammonium radical which comprises (1) sulfonating a phenyl ester of the alkanoyloxyacetic acid with a sulfonating agent to form the corresponding intermediate alkanoyloxyacetyloxybenzenesulfonic acid and (2) neutralizing the intermediate.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the sulfonating agent is selected from stabilized or unstabilized sulfur trioxide, sulfur trioxide vapor or sulfur trioxide complexes.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the solvent is selected from sulfur dioxide, methylene chloride, ethylene dichloride or carbon tetrachloride.
Claim 5
Dependent Claim
11 words
The process of claim 2 wherein the solvent is sulfur dioxide.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein no solvent is employed and the sulfonating agent is sulfur trioxide vapor.
Claim 7
Dependent Claim
25 words
The process of claim 5 wherein the sulfur trioxide vapor is diluted with nitrogen or dry air to 1 to 20% by volume sulfur trioxide.
Claim 8
Dependent Claim
28 words
The process of claim 1 wherein the neutralization is carried out in an aqueous system using sodium carbonate, potassium carbonate, sodium hydroxide or potassium hydroxide as the base.
Claim 9
Dependent Claim
32 words
The process of claim 1 wherein the neutralization is carried out in a buffered system prepared from carbonic acid and sodium hydroxide and maintained at a pH of between 4 and 6.
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) | 1995-10-06 | 1996-04-06 | 1996-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-06 | 2000-04-06 | 2000-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-06 | 2004-04-06 | 2004-10-06 | $7700.00 | Window Closed / Lapsed |