Patent US1621399A successfully refreshed from Google Patents.
Patent US3864465A successfully refreshed from Google Patents.
US3864465A
Expired / Lapsed
US
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Production Of High Purity Hydrogen
Assignee: HRI Inc
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Filing: 1972-12-15
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Granted: 1975-02-04
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Expires: 1992-12-15
Abstract
Abstract Hydrogen of a purity of at least 90% is obtained from a cryogenic unit. The impure hydrogen is pretreated for removal or conversion of the impurities in a bed of fluidized iron oxides.
Inventors
- 👤 Franklin D Hoffert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:48
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; C; C01; C01B; C01B3/00; C01B3/50; C01B3/506; C01B3/52; C01B3/56; C01B2203/00; C01B2203/04; C01B2203/0415; C01B2203/046; C01B2203/0465; C01B2203/0475; C01B2203/048; C01B2203/0485; C01B2203/0495; Y; Y10; Y10S; Y10S62/00; Y10S62/931
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
133 words
A PROCESS FOR THE PURIFICATION OF AN IMPURE HYDROGEN STREAM HAVING A HYDROGEN CONTENT OF BELOW 90% AND CONTAINING IMPURITIES INCLUDING ONE OR MORE MEMBERS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, CARBON MONOXIDE, OXYGEN, NITROGEN, WATER VAPOR, HYDROGEN SULFIDE AND HYDROCARBON SUBSTANCES WHICH COMPRISES: A. FEEDING SAID IMPURE HYDROGEN STREAM THROUGH A FLUIDIZED BED OF IRON ORE WHEREIN SAID BED IS MAINTAINED AT A PRESSURE BETWEEN 100 AND 1000 PSI AND AT A TEMPERATURE BETWEEN 600* AND 1100*F WHEREBY IMPURITIES IN THE HYDROGEN ARE CONVERTED AND IRON OXIDE PRESENT IN THE IRON ORE IS REDUCED TO IRON METAL; B. REMOVING SAID HYDROGEN STREAM AND SAID CONVERTED IMPURITIES FROM SAID BED; C. SEPARATING SAID CONVERTED IMPURITIES FROM SAID HYDROGEN; D. REMOVING A PURIFIED HYDROGEN PRODUCT STREAM CONTAINING AT LEAST 90 PERCENT HYDROGEN.
Claim 2
Dependent Claim
133 words
A PROCESS FOR THE PURIFICATION OF AN IMPURE HYDROGEN STREAM HAVING A HYDROGEN CONTENT OF BELOW 90% AND CONTAINING IMPURITIES INCLUDING ONE OR MORE MEMBERS SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, CARBON MONOXIDE, OXYGEN, NITROGEN, WATER VAPOR, HYDROGEN SULFIDE AND HYDROCARBON SUBSTANCES WHICH COMPRISES: A. FEEDING SAID IMPURE HYDROGEN STREAM THROUGH A FLUIDIZED BED OF IRON ORE WHEREIN SAID BED IS MAINTAINED AT A PRESSURE BETWEEN 100 AND 1000 PSI AND AT A TEMPERATURE BETWEEN 600* AND 1100*F WHEREBY IMPURITIES IN THE HYDROGEN ARE CONVERTED AND IRON OXIDE PRESENT IN THE IRON ORE IS REDUCED TO IRON METAL; B. REMOVING SAID HYDROGEN STREAM AND SAID CONVERTED IMPURITIES FROM SAID BED; C. SEPARATING SAID CONVERTED IMPURITIES FROM SAID HYDROGEN; D. REMOVING A PURIFIED HYDROGEN PRODUCT STREAM CONTAINING AT LEAST 90 PERCENT HYDROGEN.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein said bed is maintained at a temperature between 700* and 900*F and at a pressure between 500 and 600 psi.
Claim 4
Dependent Claim
20 words
The process of claim 1 wherein the separation in step (c) comprises the steps of scrubbing, adsorption and cryogenic separation.
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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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |