US3788037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation process
Assignee: Individual
•
Filing: 1971-06-28
•
Granted: 1974-01-29
•
Expires: 1991-06-28
Abstract
Abstract A continuous process for separating a gaseous mixture into a primary gaseous product stream and a secondary gaseous product stream utilizing four adsorbent-containing beds is disclosed.
Inventors
- 👤 Don C Shell
- 👤 David A Tanner
- 👤 Ronald D Brazzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:57
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; C; C01; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0259; C01B3/00; C01B3/50; C01B3/56; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/106; B01D2253/108; B01D2256/00; B01D2256/12; B01D2256/16; B01D2257/00; B01D2257/10; B01D2257/102; B01D2257/50; B01D2257/502; B01D2257/504; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40043; B01D2259/4005; B01D2259/40052; B01D2259/402; B01D2259/414; B01D2259/4141; B01D2259/4143; C01B2203/00; C01B2203/04; C01B2203/042; C01B2203/043; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048; C01B2210/00; C01B2210/0043; C01B2210/0046; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
A process as defined in claim 1 wherein the portion of the primary gaseous product which is discharged from the first bed and flowed through the third bed is heated between the first and third beds.
Claim 2
Dependent Claim
18 words
A process as described in claim 1 wherein the cycle time is between about 8 - 12 minutes.
Claim 3
Dependent Claim
20 words
A process as described in claim 1 wherein the selected relatively high pressure is between about 150 - 250 psig.
Claim 4
Dependent Claim
19 words
A process as described in claim 1 wherein the gaseous mixture contains at least sixty percent hydrogen, by volume.
Claim 5
Dependent Claim
15 words
A process as described in claim 1 wherein the primary gaseous product is ultra-pure hydrogen.
Claim 6
Dependent Claim
18 words
A process as described in claim 1 wherein the absorbent is activated carbon, zeolite or a mixture thereof.
Claim 7
Dependent Claim
17 words
A process as described in claim 1 wherein the cycle time is less than about five minutes.
Claim 8
Dependent Claim
13 words
A process as described in claim 1 wherein the gaseous mixture is air.
Claim 9
Dependent Claim
16 words
A process as described in claim 1 wherein the primary gaseous product is an oxygen-rich stream.
References Cited (Backward Citations)
US3176444A
Cited
US3323288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |