US3869401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized acidic hydrogen peroxide solutions
Assignee: EIDP Inc
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Filing: 1972-12-04
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Granted: 1975-03-04
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Expires: 1992-12-04
Abstract
Abstract Stabilizers are provided which control chloride ion-catalyzed degradation of hydrogen peroxide, at concentrations of up to about 5 percent H2O2 by weight, in solutions of certain strong acids at up to about 85 percent by weight concentration, and at temperatures up to about 90* C. Such stabilizers are included in concentrations up to about 5 percent by weight. The stabilizers include phenol and dihydroxybenzenes and their lower alkyl derivatives, and mononitrophenols; certain unsaturated aliphatic alcohols and amines; compounds containing a dicarbonyl methylene group capable of enolization in acid media; sodium styrene sulfonate; allyl acetate; and mixtures thereof.
Inventors
- 👤 Richard Edward Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C01; C01B; C01B15/00; C01B15/01; C01B15/037
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
A CONCENTRATED, ACIDIC, AQUEOUS SOLUTION OF HYDROGEN PEROXIDE STABILIZED AGAINST CHLORIDE ION-INDUCED DEGRADATION BY ABOUT 5 TO 50,000 PPM BY WEIGHT OF A STABILIZER SELECTED FROM THE GROUP CONSISTING OF: A. DIHYDROXYBENZENES, ALKYL DERIVATIVES OF PHENOL AND DIHYDROXYBENZENES, SAID DERIVATIVES CONTAINING ONE OR TWO LOWER ALKYL SUBSTITUENTS, AND MONONITROPHENOLS, B. UNSATURATED ALIPHATIC AMINES HAVING A CHAIN LENGTH OF THREE TO FIVE CARBON ATOMS, C. COMPOUNDS CONTAINING A DICARBONYL METHYLENE GROUP
Claim 2
Dependent Claim
70 words
A CONCENTRATED, ACIDIC, AQUEOUS SOLUTION OF HYDROGEN PEROXIDE STABILIZED AGAINST CHLORIDE ION-INDUCED DEGRADATION BY ABOUT 5 TO 50,000 PPM BY WEIGHT OF A STABILIZER SELECTED FROM THE GROUP CONSISTING OF: A. DIHYDROXYBENZENES, ALKYL DERIVATIVES OF PHENOL AND DIHYDROXYBENZENES, SAID DERIVATIVES CONTAINING ONE OR TWO LOWER ALKYL SUBSTITUENTS, AND MONONITROPHENOLS, B. UNSATURATED ALIPHATIC AMINES HAVING A CHAIN LENGTH OF THREE TO FIVE CARBON ATOMS, C. COMPOUNDS CONTAINING A DICARBONYL METHYLENE GROUP
Claim 3
Dependent Claim
18 words
A solution of claim 1 wherein the hydrogen peroxide concentration is about 30 to 70 percent by weight.
Claim 4
Dependent Claim
17 words
A solution of claim 1 wherein the stabilizer concentration is about 100 to 5,000 ppm by weight.
Claim 5
Dependent Claim
114 words
AN AQUEOUS, ACIDIC OXIDIZING SOLUTION STABILIZED AGAINST CHLORIDE ION-INDUCED DEGRADIATION AT TEMPERATURES FROM AMBIENT TO ABOUT 90*C. CONTAINING ABOUT 0.1 TO 5 PERCENT BY WEIGHT HYDROGEN PEROXIDE, ABOUT 30 TO 85 PERCENT BY OF A STRONG ACID SELECTED FROM THE GROUP CONSISTING OF H2SO4, MIXTURES OF H2SO4 AND H2SO5, CH3COOH, AND THEIR MIXTURES AND ABOUT 5 TO 50,000 PPM BY WEIGHT OF A STABILIZER SELECTED FROM THE GROUP CONSISTING OF: A. PHENOL, DIHYDROXYBENZENES, AND THEIR ALKYL DERIVATIVES CONTAINING ONE OR TWO LOWER ALKYL SUBSTITUENTS, AND MONONITROPHENOLS, B. UNSATURATED ALIPHATIC ALCOHOLS AND AMINES HAVING A CHAIN LENGTH OF THREE TO FIVE CARBON ATOMS BUT EXCLUDING UNSUBSTITUTED ALKYNYL ALCOHOLS, C. COMPOUNDS CONTAINING A DICARBONYL METHYLENE GROUP
Claim 6
Dependent Claim
114 words
AN AQUEOUS, ACIDIC OXIDIZING SOLUTION STABILIZED AGAINST CHLORIDE ION-INDUCED DEGRADIATION AT TEMPERATURES FROM AMBIENT TO ABOUT 90*C. CONTAINING ABOUT 0.1 TO 5 PERCENT BY WEIGHT HYDROGEN PEROXIDE, ABOUT 30 TO 85 PERCENT BY OF A STRONG ACID SELECTED FROM THE GROUP CONSISTING OF H2SO4, MIXTURES OF H2SO4 AND H2SO5, CH3COOH, AND THEIR MIXTURES AND ABOUT 5 TO 50,000 PPM BY WEIGHT OF A STABILIZER SELECTED FROM THE GROUP CONSISTING OF: A. PHENOL, DIHYDROXYBENZENES, AND THEIR ALKYL DERIVATIVES CONTAINING ONE OR TWO LOWER ALKYL SUBSTITUENTS, AND MONONITROPHENOLS, B. UNSATURATED ALIPHATIC ALCOHOLS AND AMINES HAVING A CHAIN LENGTH OF THREE TO FIVE CARBON ATOMS BUT EXCLUDING UNSUBSTITUTED ALKYNYL ALCOHOLS, C. COMPOUNDS CONTAINING A DICARBONYL METHYLENE GROUP
Claim 7
Dependent Claim
18 words
The solution of claim 4 wherein the hydrogen peroxide concentration is about 0.2 to 1.0 percent by weight.
Claim 8
Dependent Claim
10 words
The solution of claim 4 wherein the acid is H2SO4.
Claim 9
Dependent Claim
15 words
The solution of claim 4 wherein the acid is a mixture of H2SO4 and H2SO5.
Claim 10
Dependent Claim
17 words
The solution of claim 4 wherein the acid concentration is about 40 to 70 percent by weight.
Claim 11
Dependent Claim
14 words
The solution of claim 4 wherein the temperature is about 35* to 70* C.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |