US3923966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct manufacture of hydrogen peroxide from hydrogen sulfide
Assignee: EIDP Inc
•
Filing: 1973-11-21
•
Granted: 1975-12-02
•
Expires: 1993-11-21
Abstract
Abstract Hydrogen sulfide is reacted with an anthraquinone in an organic solvent and in the presence of an amine catalyst; the elemental sulfur thus produced is separated from the resulting anthrahydroquinone which is oxidized to yield hydrogen peroxide and the starting anthraquinone.
Inventors
- 👤 Lawrence G Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:16
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0237; B01J23/00; B01J23/02; B01J27/00; B01J27/24; C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023; C01B17/00; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
IN A METHOD FOR PREPARING HYDROGEN PEROXIDE BY REDUCING AND OXIDIZING AN ALKYL ANTHRAQUINONE, OR A TETRAHYDROALKYL ANTHRAQUINONE WITH HYDROGEN SULFIDE IN AN ORGANIC SOLSAID ANTHRAQUINONE WITH HYDROGEN SULFIDE IN AN ORGANIC SOLVENT SOLUTION IN THE PRESENCE OF A CONCENTRATION OF FROM 0.5 TO 35 PERCENT BY WEIGHT OF THE WORKING SOLUTION OF AN ORGANIC BASE CATALYST SOLUBLE IN THE ORGANIC SOLVENT WHICH DOES NOT DECOMPOSE HYDROGEN PEROXIDE, SEPARATING THE ELEMENTAL SULFURTHUS FORMED, OXIDIZING THE RESULTING ANTHRAHYDROQUINONE AND EXTRACTING THE HYDROGEN PEROXIDE WITH WATER.
Claim 2
Dependent Claim
84 words
IN A METHOD FOR PREPARING HYDROGEN PEROXIDE BY REDUCING AND OXIDIZING AN ALKYL ANTHRAQUINONE, OR A TETRAHYDROALKYL ANTHRAQUINONE WITH HYDROGEN SULFIDE IN AN ORGANIC SOLSAID ANTHRAQUINONE WITH HYDROGEN SULFIDE IN AN ORGANIC SOLVENT SOLUTION IN THE PRESENCE OF A CONCENTRATION OF FROM 0.5 TO 35 PERCENT BY WEIGHT OF THE WORKING SOLUTION OF AN ORGANIC BASE CATALYST SOLUBLE IN THE ORGANIC SOLVENT WHICH DOES NOT DECOMPOSE HYDROGEN PEROXIDE, SEPARATING THE ELEMENTAL SULFURTHUS FORMED, OXIDIZING THE RESULTING ANTHRAHYDROQUINONE AND EXTRACTING THE HYDROGEN PEROXIDE WITH WATER.
Claim 3
Dependent Claim
11 words
The improvement of claim 1 wherein the catalyst is an amine.
Claim 4
Dependent Claim
24 words
The improvement of claim 2 wherein the catalyst is a tertiary amine, the substituent groups of which contain from 1 to 20 carbon atoms.
Claim 5
Dependent Claim
23 words
The improvement of claim 3 wherein the catalyst is a diamine in which each of the amino groups contains a tertiary nitrogen atom.
Claim 6
Dependent Claim
16 words
The improvement of claim 2 wherein the amine concentration is 0.5 to 10 percent by weight.
Claim 7
Dependent Claim
21 words
The improvement of claim 1 wherein the organic solvent is diisobutyl carbinol, mono or dimethyl naphthalene, xylene, Hi-Sol or mixtures thereof.
Claim 8
Dependent Claim
14 words
The improvement of claim 1 wherein the anthraquinone is tetrahydro-2-ethyl, tetrahydro-2-butyl- or tetrahydro-2-amyl anthraquinone.
Claim 9
Dependent Claim
14 words
The improvement of claim 1 wherein the anthraquinone is 2-ethyl-, 2-tert-butyl or 2-amyl anthraquinone.
Claim 10
Dependent Claim
13 words
The improvement of claim 1 wherein the temperature is from 10* to 200*C.
Claim 11
Dependent Claim
14 words
The improvement of claim 1 wherein the pressure is from 1 to 10 atmospheres.
References Cited (Backward Citations)
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Cited
US2772146A
Cited
US2819950A
Cited
US2997439A
Cited
US3098714A
Cited
US3307909A
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |