US4132762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen peroxide stabilization
Assignee: Shell USA Inc
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Filing: 1977-10-31
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Granted: 1979-01-02
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Expires: 1997-10-31
Abstract
Abstract Hydrogen peroxide in aqueous solution is stabilized against decomposition due to transition metal impurities by a synergistic combination of sulfonic acid type ion exchange resin and acetonitrile.
Inventors
- 👤 Leo Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:19
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/037
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
A method of stabilizing an aqueous hydrogen peroxide solution against decomposition caused by transition metals, said solution having up to about thirty percent by weight of hydrogen peroxide, which comprises adding to the solution more than about 0.001 milliliters of acetonitrile per milliliter of total solution and more than 0.001 milliequivalents of an acid ion exchange resin per milliliter of total solution.
Claim 2
Independent Claim
62 words
A method of stabilizing an aqueous hydrogen peroxide solution against decomposition caused by transition metals, said solution having up to about thirty percent by weight of hydrogen peroxide, which comprises adding to the solution more than about 0.001 milliliters of acetonitrile per milliliter of total solution and more than 0.001 milliequivalents of an acid ion exchange resin per milliliter of total solution.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the resin is a sulfonated styrene-divinylbenzene resin.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein the acetonitrile is more than about 0.01 milliliters per milliliter of total solution and the resin is more than about 0.01 milliequivalents per milliliter of total solution.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein the resin is a sulfonated styrene-divinylbenzene resin.
Claim 6
Dependent Claim
51 words
A composition comprising an aqueous hydrogen peroxide solution containing up to about thirty percent by weight of hydrogen peroxide and more than 0.001 milliliters of acetonitrile per milliliter of total solution and in contact with more than about 0.001 milliequivalents of an acid ion exchange resin per milliliter of total solution.
Claim 7
Dependent Claim
51 words
A composition comprising an aqueous hydrogen peroxide solution containing up to about thirty percent by weight of hydrogen peroxide and more than 0.001 milliliters of acetonitrile per milliliter of total solution and in contact with more than about 0.001 milliequivalents of an acid ion exchange resin per milliliter of total solution.
Claim 8
Dependent Claim
13 words
The composition of claim 5 wherein the resin is a sulfonated styrene-divinylbenzene resin.
Claim 9
Dependent Claim
33 words
The composition of claim 5 wherein the acetonitrile is more than about 0.01 milliliters per milliliter of total solution and the resin is more than about 0.001 milliequivalents per milliliter of total solution.
Claim 10
Dependent Claim
13 words
The composition of claim 7 wherein the resin is a sulfonated styrene-divinylbenzene resin.
References Cited (Backward Citations)
US4007256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |