US3864271A
Expired / Lapsed
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Stabilized acidic hydrogen peroxide solutions
Assignee: EIDP Inc
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Filing: 1972-12-04
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Granted: 1975-02-04
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Expires: 1992-12-04
Abstract
Abstract Stabilizers are provided which control copper ion-catalyzed degradation of hydrogen peroxide. In pickling baths the H2O2 concentration may be up to about 50% by weight, in the presence of strong inorganic nonoxidizing acids at up to about 50% by weight, and at temperatures of up to about 90*C. Such stabilizers are included in concentrations of up to about 1.5% by weight. The stabilizers, at concentrations of up to about 5% by weight, may also be formulated into H2O2 of up to 80% concentration by weight. The stabilizers are selected from the group consisting of adipic acid, glutaric acid, succinic acid, their methyl derivatives, salts, and mixtures of them.
Inventors
- 👤 Neil J Stalter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:55
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/10; C23G1/103
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
17 words
The solution of claim 1 wherein the stabilizer concentration is about 0.003 to 1.5 percent by weight.
Claim 2
Dependent Claim
17 words
The solution of claim 2 wherein the stabilizer concentration is about 0.015 to 1.5 percent by weight.
Claim 3
Dependent Claim
17 words
THE SOLUTION OF CLAIM 3 WHEREIN THE STABILIZER CONCENTRATION IS ABOUT 0.03 TO 0.1 PERCENT BY WEIGHT.
Claim 4
Dependent Claim
17 words
The solution of claim 1 wherein the acid concentration is about 2 to 25 percent by weight.
Claim 5
Dependent Claim
17 words
The solution of claim 1 wherein the H2O2 concentration is about 0.05 to 15 percent by weight.
Claim 6
Dependent Claim
17 words
The solution of claim 6 wherein the H2O2 concentration is about 0.5 to 3.0 percent by weight.
Claim 7
Dependent Claim
11 words
The solution of claim 1 wherein the stabilizer is adipic acid.
Claim 8
Dependent Claim
11 words
The solution of claim 1 wherein the stabilizer is glutaric acid.
Claim 9
Dependent Claim
11 words
The solution of claim 1 wherein the stabilizer is succinic acid.
Claim 10
Dependent Claim
14 words
The solution of claim 1 wherein the stabilizer is a mixture of the stabilizers.
Claim 11
Dependent Claim
13 words
The solution of claim 11 wherein the mixture comprises succinic and adipic acids.
Claim 12
Dependent Claim
19 words
The solution of claim 12 wherein the ratio of succinic acid to adipic acid is approximately 2:1 by weight.
Claim 13
Dependent Claim
35 words
A concentrated, aqueous, acidic solution of hydrogen peroxide stabilized against copper ion-catalyzed degradation by a stabilizing amount of a stabilizer selected from the group consisting of adipic acid, glutaric acid, succinic acid, and mixtures thereof.
Claim 14
Dependent Claim
18 words
The solution of claim 14 wherein the hydrogen peroxide concentration is about 30 to 70 percent by weight.
Claim 15
Dependent Claim
18 words
The solution of claim 15 wherein the hydrogen peroxide concentration is about 35 to 50 percent by weight.
Claim 16
Dependent Claim
11 words
The solution of claim 14 wherein the stabilizer is adipic acid.
Claim 17
Dependent Claim
11 words
The solution of claim 14 wherein the stabilizer is glutaric acid.
Claim 18
Dependent Claim
11 words
The solution of claim 14 wherein the stabilizer is succinic acid.
Claim 19
Dependent Claim
14 words
The solution of claim 14 wherein the stabilizer is a mixture of the stabilizers.
Claim 20
Dependent Claim
13 words
The solution of claim 20 wherein the mixture comprises succinic and adipic acids.
Claim 21
Dependent Claim
19 words
The solution of claim 21 wherein the ratio of succinic acid to adipic acid is approximately 2:1 by weight.
Claim 22
Dependent Claim
29 words
The solution of claim 14 which contains in addition one or more stabilizing chemicals selected from the group consisting of stannates, sulfates, pyrophosphates, fluosilicates, nitrates, and alkylidene diphosphonic 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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |