US4917815A
Expired / Lapsed
US
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Stable aqueous aromatic percarboxylic acid solution
Assignee: Schuelke and Mayr GmbH
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Filing: 1988-06-10
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Granted: 1990-04-17
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Expires: 2008-06-10
Abstract
Abstract Aqueous solutions of aromatic percarboxylic acids, such as perbenzoic acids, stabilized with at least an equal amount in parts by weight as the amount of aromatic percarboxylic acid of the corresponding aromatic carboxylic acid and an aqueous solution of perglutaric acid stabilized with hydrogen peroxide and/or a 10% to 60% aqueous solution of hydrogen peroxide.
Inventors
- 👤 Wolfgang Beilfuss
- 👤 Karl-Heinz Diehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:09
CPC Classifications
C; C07; C07C; C07C407/00; C07C407/003; C07C407/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A stabilized aqueous disinfecting and bleaching solution comprising an aromatic percarboxylic acid, a stabilizer for the aromatic percarboxylic acid and water, in which the stabilizer comprises: an aromatic carboxylic acid corresponding to the aromatic percarboxylic acid and in an amount at least about equal in parts by weight to the aromatic percarboxylic acid; and at least one of (i) an aqueous solution of perglutaric acid stabilized with an excess of hydrogen peroxide; or (ii) a 10% to 60% aqueous solution of hydrogen peroxide.
Claim 2
Dependent Claim
83 words
A stabilized aqueous disinfecting and bleaching solution comprising an aromatic percarboxylic acid, a stabilizer for the aromatic percarboxylic acid and water, in which the stabilizer comprises: an aromatic carboxylic acid corresponding to the aromatic percarboxylic acid and in an amount at least about equal in parts by weight to the aromatic percarboxylic acid; and at least one of (i) an aqueous solution of perglutaric acid stabilized with an excess of hydrogen peroxide; or (ii) a 10% to 60% aqueous solution of hydrogen peroxide.
Claim 3
Dependent Claim
61 words
The stabilized aqueous disinfecting and bleaching solution of claim 1 wherein the aromatic percarboxylic acid is selected from the group consisting of perbenzoic acid, 4-tert-butylperbenzoic acid, 4-methoxyperbenzoic acid, 2-methylperbenzoic acid, 3-methylperbenzoic acid, 4-methylperbenzoic acid, 4-cyanoperbenzoic acid, 4-nitroperbenzoic acid, 3-chloroperbenzoic acid, 2,4-dichloroperbenzoic acid, 4-fluoroperbenzoic acid, 4-phenylperbenzoic acid, 4-methoxycarbonylperbenzoic acid, 4trifluoromethylperbenzoic acid, 2-sulfoperbenzoic acid, 4-sulfoperbenzoic acid, monoperphthalic acid, 2pernaphthoic acid and 2furanperoxycarboxylic acid.
Claim 4
Dependent Claim
86 words
The stabilized aqueous disinfecting and bleaching solution of claim 1 wherein, based on the weight of the stabilized aqueous disinfecting and bleaching solution the aromatic percarboxylic acid and the corresponding aromatic carboxylic acid each is present in an amount of from about 0.001 to about 2 percent by weight and wherein the stabilizer consists essentially of the corresponding aromatic carboxylic acid and the aqueous perglutaric acid solution, the aqueous perglutaric acid being present in an amount of from about 5 to about 35 present by weight.
Claim 5
Dependent Claim
71 words
The stabilized aqueous disinfecting and bleaching solution of claim 3 wherein the aromatic percarboxylic acid is present in an amount of from about 0.05 to about 0.5 percent by weight, the corresponding aromatic carboxylic acid is present in an amount of from about 0.05 to about 1 percent by weight and the aqueous perglutaric acid solution is present in an amount of from about 10 to about 20 percent by weight.
Claim 6
Dependent Claim
71 words
The stabilized aqueous disinfecting and bleaching solution of claim 1 wherein based on the weight of the stabilized aqueous disinfecting and bleaching solution the aromatic percarboxylic acid and the corresponding aromatic carboxylic acid each is present in an amount of from about 0.001 to about 0.5 percent by weight and wherein the stabilizer consists essentially of the corresponding aromatic carboxylic acid and a 10% to 60% aqueous solution of hydrogen peroxide.
Claim 7
Dependent Claim
63 words
The stabilized aqueous disinfecting and bleaching acid solution of claim 5 wherein the aromatic percarboxylic acid is present in an amount of about 0.01 to about 0.2 percent by weight and the corresponding aromatic carboxylic acid is present in an amount of about 0.01 to about 0.5 percent by weight and wherein the concentration of the hydrogen peroxide solution is 20% to 30%.
Claim 8
Dependent Claim
19 words
The stabilized aqueous disinfecting and bleaching acid solution of claim 1 wherein the aromatic percarboxylic acid is perbenzoic acid.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |