Patent US3901669A successfully refreshed from Google Patents.
US3901669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrogen from high temperature steam
Assignee: Sun Ventures Inc
•
Filing: 1973-11-05
•
Granted: 1975-08-26
•
Expires: 1993-11-05
Abstract
Abstract A process for preparing hydrogen from steam dissociated into hydrogen and oxygen by heating it at a temperature above 1,500*C., passing the dissociated steam through a first chamber having a wall in common with a second chamber, which common wall is permeable to oxygen, and cooling the gaseous effluent from said first chamber to yield a hydrogen rich stream.
Inventors
- 👤 Walter H Seitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:30
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/50; H03K4/56; B; B01; B01D; B01D53/00; B01D53/22; C; C01; C01B; C01B3/00; C01B3/02; C01B3/04; C01B3/042; C01B3/045; G; G06; G06G; G06G7/00; G06G7/12; G06G7/20; H03K4/04; B01D2313/00; B01D2313/22; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
A PROCESS FOR PREPARING HYDROGEN FRON STEAM WHICH COMPRISES DISSOCIATING STEAM INTO HYDROGEN AND OXYGEN BY HEATING AT A TEMPERATURE ABOVE 1.500*C., PASSING THE DISSOCIATED STEAM THROUGH A FIRST CHAMBER HAVING A WALL IN COMMON WITH A SECOND CHAMBER, WHICH COMMON WALL IS A REFRACTORY OXIDE PERMEABLE TO OXYGEN AND THROUGH WHICH OXYGEN FROM
Claim 2
Dependent Claim
54 words
A PROCESS FOR PREPARING HYDROGEN FRON STEAM WHICH COMPRISES DISSOCIATING STEAM INTO HYDROGEN AND OXYGEN BY HEATING AT A TEMPERATURE ABOVE 1.500*C., PASSING THE DISSOCIATED STEAM THROUGH A FIRST CHAMBER HAVING A WALL IN COMMON WITH A SECOND CHAMBER, WHICH COMMON WALL IS A REFRACTORY OXIDE PERMEABLE TO OXYGEN AND THROUGH WHICH OXYGEN FROM
Claim 3
Dependent Claim
99 words
A process for preparing hydrogen from steam which comprises dissociating steam into hydrogen and oxygen by heating it at a temperature between about 2,000*C. and about 2,200*C. to effect dissociation, passing the dissociated steam through a first chamber having a wall of a refractory oxide in common with a second chamber, said wall being permeable to oxygen and through which the oxygen from the dissociated steam passes at a temperature of said steam dissociation, sweeping the second chamber with a reducing gas, cooling the gaseous effluent from said first chamber to condense water, and separating a hydrogen rich stream.
Claim 4
Dependent Claim
99 words
A process for preparing hydrogen from steam which comprises dissociating steam into hydrogen and oxygen by heating it at a temperature between about 2,000*C. and about 2,200*C. to effect dissociation, passing the dissociated steam through a first chamber having a wall of a refractory oxide in common with a second chamber, said wall being permeable to oxygen and through which the oxygen from the dissociated steam passes at a temperature of said steam dissociation, sweeping the second chamber with a reducing gas, cooling the gaseous effluent from said first chamber to condense water, and separating a hydrogen rich stream.
Claim 5
Dependent Claim
13 words
The process of claim 2 where the refractory oxide common wall is zirconia.
Claim 6
Dependent Claim
12 words
The process of claim 2 where the reducing gas is producer gas.
Claim 7
Dependent Claim
23 words
The process of claim 3 where the oxidized producer gas is used as a source of fuel in a preheater for said steam.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |