US4335092A
Expired / Lapsed
US
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Synthesis of hydrogen peroxide
Assignee: Air Products and Chemicals Inc
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Filing: 1980-10-10
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Granted: 1982-06-15
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Expires: 2000-10-10
Abstract
Abstract Hydrogen peroxide is synthesized by contacting hydrogen and oxygen with a supported palladium catalyst in the presence of methanol. Preferably, the methanol contains up to 1.0% by weight of formaldehyde and is at least 0.0001 N in hydrochloric acid.
Inventors
- 👤 Augustine I. Dalton, Jr.
- 👤 Ronald W. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:05
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/029
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
38 words
In the process of preparing hydrogen peroxide by contacting hydrogen and oxygen with a palladium catalyst on a solid support in the presence of a liquid medium, the improvement wherein the liquid medium is methanol without added water.
Claim 2
Dependent Claim
38 words
In the process of preparing hydrogen peroxide by contacting hydrogen and oxygen with a palladium catalyst on a solid support in the presence of a liquid medium, the improvement wherein the liquid medium is methanol without added water.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein the liquid medium is at least 0.0001 N in hydrochloric acid.
Claim 4
Dependent Claim
14 words
The process of claim 1, wherein the support for the Pd catalyst is carbon.
Claim 5
Dependent Claim
27 words
The process of claim 1, wherein the liquid medium is at least 0.0001 N in hydrochloric acid and the solid support for the palladium catalyst is carbon.
Claim 6
Dependent Claim
11 words
The process of claim 1, carried out as a continuous process.
Claim 7
Dependent Claim
21 words
The process of claim 1, wherein the liquid medium is at least 0.0001 N in each of sulfuric and hydrochloric acids.
Claim 8
Dependent Claim
14 words
The process of claim 1, wherein the medium contains 0.1-1.0% by weight of formaldehyde.
Claim 9
Dependent Claim
50 words
In the process of preparing hydrogen peroxide by contacting hydrogen and oxygen with a palladium catalyst on a solid support in the presence of a liquid medium, the improvement wherein the liquid medium is aqueous methanol containing at least 75% by volume of methanol and 0.1-1.0% by weight of formaldehyde.
Claim 10
Dependent Claim
50 words
In the process of preparing hydrogen peroxide by contacting hydrogen and oxygen with a palladium catalyst on a solid support in the presence of a liquid medium, the improvement wherein the liquid medium is aqueous methanol containing at least 75% by volume of methanol and 0.1-1.0% by weight of formaldehyde.
Claim 11
Dependent Claim
11 words
The process of claim 8, carried out as a continuous process.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |