Patent US4393038A successfully refreshed from Google Patents.
US4393038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen peroxide production
Assignee: Lyondell Chemical Technology LP
•
Filing: 1981-10-16
•
Granted: 1983-07-12
•
Expires: 2001-10-16
Abstract
Abstract Hydrogen is diffused through a palladium-containing membrane into an aqueous solution containing ions of a stabilizing nature and containing dissolved oxygen to form hydrogen peroxide. Some water is formed as a by-product. The hydrogen peroxide may be identified and/or recovered from said aqueous solution in an identification zone.
Inventors
- 👤 Hsiang-ning Sun
- 👤 John J. Leonard
- 👤 Harold Shalit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/029
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
172 words
A method of preparing aqueous solution of hydrogen peroxide which method consists of: providing a slightly acidic aqueous solution containing ions tending to stabilize hydrogen peroxide and substantially free from ions catalyzing the decomposition of hydrogen peroxide; dissolving oxygen in said aqueous solution; positioning a first surface of a predominantly palladium membrane metallic structure in contact with said aqueous solution containing dissolved oxygen; controlling the pressure of a hydrogen stream so that hydrogen is supplied to the surface opposite said first surface of said metallic structure at a rate at least equal to the diffusion rate of hydrogen through said membrane; controlling the temperature of said aqueous solution and said metallic structure to be within the range from 10°-150° C., whereby the hydrogen diffusing to said first surface surface of said membrane reacts with dissolved oxygen to form a reaction mixture consisting of hydrogen peroxide and water plus said aqueous solution; directing a stream of said reaction mixture to a recovery zone appropriate for the recovery of the thus produced hydrogen peroxide.
Claim 2
Independent Claim
172 words
A method of preparing aqueous solution of hydrogen peroxide which method consists of: providing a slightly acidic aqueous solution containing ions tending to stabilize hydrogen peroxide and substantially free from ions catalyzing the decomposition of hydrogen peroxide; dissolving oxygen in said aqueous solution; positioning a first surface of a predominantly palladium membrane metallic structure in contact with said aqueous solution containing dissolved oxygen; controlling the pressure of a hydrogen stream so that hydrogen is supplied to the surface opposite said first surface of said metallic structure at a rate at least equal to the diffusion rate of hydrogen through said membrane; controlling the temperature of said aqueous solution and said metallic structure to be within the range from 10°-150° C., whereby the hydrogen diffusing to said first surface surface of said membrane reacts with dissolved oxygen to form a reaction mixture consisting of hydrogen peroxide and water plus said aqueous solution; directing a stream of said reaction mixture to a recovery zone appropriate for the recovery of the thus produced hydrogen peroxide.
Claim 3
Dependent Claim
18 words
The method of claim 1 in which the surfaces of said metallic structure are a palladium silver alloy.
Claim 4
Dependent Claim
17 words
The method of claim 1 in which said solution contains phosphate ions tending to stabilize hydrogen peroxide.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |