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US4035471A
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Hydrogen peroxide stabilization with cyanoalkyl ethers of trialkanolamines
Assignee: PPG Industries Inc
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Filing: 1976-06-10
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Granted: 1977-07-12
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Expires: 1996-06-10
Abstract
Abstract Aqueous hydrogen peroxide solutions are stabilized with the use of cyanoalkyl ethers of trialkanolamines, such as the condensation product of triethanolamine and acrylonitrile, preferably in combination with known stabilizer additives, i.e., stannates, nitrates, and pyrophosphates.
Inventors
- 👤 Walker Albert Strong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:34
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K47/00; A61K47/06; A61K47/16; A61K47/18; A61K8/19; A61K8/22; A61Q; A61Q5/00; A61Q5/04; A61Q5/08; A61Q5/10; C; C01; C01B; C01B15/00; C01B15/01; C01B15/037; A61K2800/00; A61K2800/40; A61K2800/52
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
55 words
A stabilized aqueous hydrogen peroxide solution having between about 3 and 90 weight percent hydrogen peroxide, having dissolved therein a minor stabilizing concentration of a cyanoalkyl ether represented by the general formula ##STR2## wherein each R independently is a lower alkylene group having 1 to 4 carbons and each R' independently is hydrogen or methyl.
Claim 2
Dependent Claim
55 words
A stabilized aqueous hydrogen peroxide solution having between about 3 and 90 weight percent hydrogen peroxide, having dissolved therein a minor stabilizing concentration of a cyanoalkyl ether represented by the general formula ##STR2## wherein each R independently is a lower alkylene group having 1 to 4 carbons and each R' independently is hydrogen or methyl.
Claim 3
Dependent Claim
67 words
The hydrogen peroxide solution of claim 1 having dissolved therein between about 0.01 and 2.0 weight percent, by weight of hydrogen peroxide, of the cyanoalkyl ether, between about 0.001 and 1.0 weight percent, calculated as sodium stannate trihydrate, of an alkali metal or ammonium stannate and between about 0.001 and 1.0 weight percent, calculated as ammonium nitrate, of nitric acid or an alkali metal or ammonium nitrate.
Claim 4
Dependent Claim
33 words
The hydrogen peroxide solution of claim 2 further having dissolved therein between about 0.001 and 2.0 weight percent, calculated as disodium dihydrogen pyrophosphate, of pyrophosphoric acid or an alkali metal or ammonium pyrophosphate.
Claim 5
Dependent Claim
29 words
The hydrogen peroxide solution of claim 1, wherein the cyanoalkyl ether is the compound represented by the formula N(CH 2 CH 2 --O--CH 2 CH 2 --C.tbd.N) 3 .
Claim 6
Independent Claim
56 words
A method of stabilizing aqueous hydrogen peroxide, which comprises adding to a 3 to 90 weight percent aqueous hydrogen peroxide solution a minor stabilizing amount of a cyanoalkyl ether represented by the general formula ##STR3## wherein R independently is a lower alkylene group having 1 to 4 carbons and each R' independently is hydrogen or methyl.
Claim 7
Independent Claim
56 words
A method of stabilizing aqueous hydrogen peroxide, which comprises adding to a 3 to 90 weight percent aqueous hydrogen peroxide solution a minor stabilizing amount of a cyanoalkyl ether represented by the general formula ##STR3## wherein R independently is a lower alkylene group having 1 to 4 carbons and each R' independently is hydrogen or methyl.
Claim 8
Dependent Claim
66 words
The method of claim 5 which further comprises adding between about 0.01 and 2.0 weight percent, by weight of hydrogen peroxide, of the cyanoalkyl ether, between about 0.001 and 1.0 weight percent, calculated as sodium stannate trihydrate, of an alkali metal or ammonium stannate and between about 0.001 and 1.0 weight percent, calculated as ammonium nitrate, of nitric acid or an alkali metal or ammonium nitrate.
Claim 9
Dependent Claim
31 words
The method of claim 6 which further comprises adding between about 0.001 and 2.0 weight percent, calculated as disodium dihydrogen pyrophosphate, of pyrophosphoric acid or an alkali metal or ammonium pyrophosphate.
Claim 10
Dependent Claim
27 words
The method of claim 5, wherein the cyanoalkyl ether is the compound represented by the formula N(CH 2 CH 2 --O--CH 2 CH 2 --C.tbd.N) 3 .
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |