Patent US4536313A successfully refreshed from Google Patents.
US4536313A
Expired / Lapsed
US
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Peroxygen compound
Assignee: Solvay Interox Ltd
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Filing: 1984-03-12
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Granted: 1985-08-20
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Expires: 2004-03-12
Abstract
Abstract Increased energy costs have stimulated a demand for peroxygen compounds that are effective at ambient to hand-hot temperatures, but peroxyacids and acyl peroxides tend to suffer from one or more of poor thermal stability, or sensitivity to impact, thereby rendering their manufacture or storage hazardous, or from poor solubility. The instant invention provides a salt of the formula (in anhydrous form): ##STR1## The salt can be incorporated in low temperature bleaching compositions, in washing compositions, in sanitizing compositions or in disinfection/sterilization compositions.
Inventors
- 👤 Geoffrey J. Hignett
- 👤 Kenneth T. Rowbottom
- 👤 William R. Sanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:09
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3945; C07; C07C; C07C409/00; C07C409/42; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
14 words
In solid form, a salt, expressed in anhydrous form, having the general formula: ##STR4##
Claim 2
Dependent Claim
14 words
In solid form, a salt, expressed in anhydrous form, having the general formula: ##STR4##
Claim 3
Dependent Claim
76 words
A process for the manufacture of the monomagnesium salt of 3-sulphoperoxybenzoic acid comprising reacting a suspension of the corresponding salt of 3-sulphobenzoic acid or salt thereof in the presence of a strong acid with concentrated hydrogen peroxide until at least some of the carboxylic acid groups have been peroxidised at a temperature selected in the range of ambient to 60° C., precipitating the monomagnesium salt of 3-sulphoperoxybenzoic acid, and separating the precipitate from its mother liquor.
Claim 4
Dependent Claim
76 words
A process for the manufacture of the monomagnesium salt of 3-sulphoperoxybenzoic acid comprising reacting a suspension of the corresponding salt of 3-sulphobenzoic acid or salt thereof in the presence of a strong acid with concentrated hydrogen peroxide until at least some of the carboxylic acid groups have been peroxidised at a temperature selected in the range of ambient to 60° C., precipitating the monomagnesium salt of 3-sulphoperoxybenzoic acid, and separating the precipitate from its mother liquor.
Claim 5
Dependent Claim
30 words
A process according to claim 2 in which the mole ratio of hydrogen peroxide to the 3-sulphobenzoic acid or salt thereof is selected in the range of 1.2:1 to 5:1.
Claim 6
Dependent Claim
21 words
A process according to claim 2 in which the reaction is effected at a temperature of 30° C. to 45° C.
Claim 7
Dependent Claim
20 words
A process according to claim 2 in which the reaction period/residence time is from half an hour to four hours.
Claim 8
Dependent Claim
17 words
A process according to claim 2 employing hydrogen peroxide having a concentration of at least 70% w/w.
Claim 9
Dependent Claim
18 words
A process according to claim 2 in which the reaction mixture is cooled by at least 15° C.
Claim 10
Dependent Claim
56 words
A process according to claim 2 in which the mole ratio of hydrogen peroxide to the 3-sulphobenzoic acid or salt thereof is selected in the range of 1.2:1 to 5:1 and the reaction is effected at a temperature of 30° C. to 45° C. during areaction period/residence time of from half an hour to four hours.
Claim 11
Dependent Claim
21 words
A process according to claim 2 or 8 in which the magnesium nitrate is introduced as a substantially saturated aqueous solution.
Claim 12
Dependent Claim
39 words
A process according to claim 2 or 8 in which the 3-sulphobenzoic acid or salt thereof is suspended in sulphuric acid or methanesulphonic acid in a mole ratio of the former to the latter of not less than 1:20.
Claim 13
Dependent Claim
44 words
A process according to claim 10 in which the suspension is obtained by reacting benzoic acid with sulphuric acid in a mole ratio of the former to the latter of from 1:3.5 to 1:20, so as to form 3-sulphobenzoic acid in a sulphuric acid.
Claim 14
Dependent Claim
52 words
A process according to claim 2 or 8 in which the reaction medium comprises either a hydrocarbon or halogenated hydrocarbon or mixtures thereof, providing a boiling point for the medium within the respective specified temperature range in claim 2 or 4, and containing at least a catalytic amount of the strong acid.
Claim 15
Dependent Claim
15 words
A process according to claim 12 in which the cation medium comprises pentane and/or dichloromethane.
Claim 16
Dependent Claim
28 words
A desensitised peroxygen composition comprising magnesium 3-sulphoperoxybenzoic acid, hereinafter MMSPB, in intimate contact with a solid diluent in an amount of at least half the weight of MMSPB.
Claim 17
Dependent Claim
28 words
A desensitised peroxygen composition comprising magnesium 3-sulphoperoxybenzoic acid, hereinafter MMSPB, in intimate contact with a solid diluent in an amount of at least half the weight of MMSPB.
Claim 18
Dependent Claim
32 words
A bleach composition comprising a buffering agent or pH regulator and MMSPB, in such relative amounts that a 1% solution of the composition in water has a pH of 7 to 8.5.
Claim 19
Dependent Claim
32 words
A bleach composition comprising a buffering agent or pH regulator and MMSPB, in such relative amounts that a 1% solution of the composition in water has a pH of 7 to 8.5.
Claim 20
Dependent Claim
12 words
A washing composition comprising a surfactant and at least 0.5% w/w MMSPB.
Claim 21
Dependent Claim
12 words
A washing composition comprising a surfactant and at least 0.5% w/w MMSPB.
Claim 22
Dependent Claim
32 words
A washing composition according to claim 16 containing at least 1% surfactant, at least 1% builder, up to 40% processing aid, up to 20% detergent auxiliary agents and 0.5 to 10% MMSPB.
Claim 23
Dependent Claim
25 words
A sanitising composition comprising 1% to 70% alkali metal chloride or bromide, 0.5% to 40% MMSPB, 0 to 50% surfactant, and 0 to 20% builder.
Claim 24
Dependent Claim
25 words
A sanitising composition comprising 1% to 70% alkali metal chloride or bromide, 0.5% to 40% MMSPB, 0 to 50% surfactant, and 0 to 20% builder.
Claim 25
Dependent Claim
61 words
A composition according to any one of claims 14 to 18 or 24 which additionally contains from 0.1 to 5% w/w of a complexing agent that satisfies the general formula: ##STR5## in which X represents a carboxylic acid or a phosphonic acid group or an alkali or alkaline earth metal salt thereof, and in which a represents 0, 1 or 2.
Claim 26
Dependent Claim
15 words
A process according to claim 2 wherein precipitation is effected by cooling the reaction mixture.
Claim 27
Dependent Claim
19 words
A process according to claim 2 wherein precipitation is effected by augmenting the concentration of metal ions in solution.
Claim 28
Dependent Claim
23 words
A process according to claim 21 wherein the concentration of metal ions in solution is augmented by introducing magnesium nitrate into said solution.
Claim 29
Dependent Claim
16 words
A composition according to claim 16 which further contains at least 40% w/w of a persalt.
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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |