Patent US4336239A successfully refreshed from Google Patents.
US4336239A
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Synthesis of hydrogen peroxide
Assignee: Air Products and Chemicals Inc
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Filing: 1980-12-22
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Granted: 1982-06-22
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Expires: 2000-12-22
Abstract
Abstract This invention relates to an improvement in hydrogen peroxide synthesis from hydrogen and oxygen, in an acidic medium containing an oxygenated or nitrogenous organic compound using a supported Group VIII noble metal catalyst. The improvement comprises using an oxygen/hydrogen ratio higher than about 3.4 and a catalyst level above 30 mg. per 100 ml. of medium.
Inventors
- 👤 Augustine I. Dalton, Jr.
- 👤 Ronald W. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:36
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/029
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
80 words
In a process for the synthesis of hydrogen peroxide from hydrogen and oxygen, in the presence of a Group VIII noble metal catalyst deposited on a solid support, in an acidic medium containing an oxygenated organic compound or a nitrogenous organic compound, the improvement wherein the partial pressure or molar ratio ratio of oxygen to hydrogen is greater than about 3.4 and the amount of Group VIII noble metal catalyst is more than 30 mg. per 100 ml. of medium.
Claim 2
Dependent Claim
80 words
In a process for the synthesis of hydrogen peroxide from hydrogen and oxygen, in the presence of a Group VIII noble metal catalyst deposited on a solid support, in an acidic medium containing an oxygenated organic compound or a nitrogenous organic compound, the improvement wherein the partial pressure or molar ratio ratio of oxygen to hydrogen is greater than about 3.4 and the amount of Group VIII noble metal catalyst is more than 30 mg. per 100 ml. of medium.
Claim 3
Dependent Claim
16 words
The process of claim 1, wherein the Group VIII noble metal is palladium supported on carbon.
Claim 4
Dependent Claim
12 words
The process of claim 1, wherein the acidic medium contains aqueous acetone.
Claim 5
Dependent Claim
11 words
The process of claim 1, wherein the acidic medium contains methanol.
Claim 6
Dependent Claim
13 words
The process of claim 1, wherein the oxygen/hydrogen ratio is greater than 5.
Claim 7
Dependent Claim
11 words
The process of claim 1, wherein the oxygen/hydrogen ratio is 12-15.
Claim 8
Dependent Claim
30 words
The process of claim 1, wherein the catalyst is packed in a fixed bed reactor and hydrogen, oxygen and acidic medium are flowed cocurrently through the fixed bed of catalyst.
Claim 9
Dependent Claim
61 words
The process of claim 1, wherein the Group VIII noble metal is palladium supported on carbon, the acidic medium contains aqueous acetone containing a sequestrative stabilizer for hydrogen peroxide, the oxygen/hydrogen ratio is greater than 5 and the catalyst is packed in a fixed bed reactor and hydrogen, oxygen and acidic medium are flowed cocurrently through the fixed bed of catalyst.
Claim 10
Dependent Claim
60 words
The process of claim 1, wherein the Group VIII noble metal is palladium supported on carbon, the acidic medium contains methanol containing a sequestrative stabilizer for hydrogen peroxide, the oxygen/hydrogen ratio is greater than 5 and the catalyst is packed in a fixed bed reactor and hydrogen, oxygen and acidic medium are flowed cocurrently through the fixed bed of catalyst.
Claim 11
Dependent Claim
14 words
The process of claim 1, wherein oxygen is provided from air or oxygen-enriched air.
Claim 12
Dependent Claim
25 words
The process of claim 1, wherein the amount of Group VIII noble metal catalyst is more than about 35 mg. per 100 ml. of medium.
Claim 13
Dependent Claim
17 words
The process of claim 1, carried out as a continuous process employing a fixed bed of catalyst.
References Cited (Backward Citations)
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Cited
US3336112A
Cited
US4009252A
Cited
US4007256A
Cited
GB1490925A
Cited
GB1546129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |