US3797201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption process for gas separation
Assignee: Individual
•
Filing: 1972-03-17
•
Granted: 1974-03-19
•
Expires: 1992-03-17
Abstract
Abstract In a process of separating a readily adsorbable gas and a less readily adsorbable gas separately from a mixture of these gases by introducing the gas mixture into an adsorption column containing an adsorbent to adsorb thereon the readily adsorbable gas and then recovering the adsorbed gas by desorbing it under a reduced pressure, the purity of the readily adsorbable gas thus recovered is greatly increased by purging the adsorption column prior to the desorption step with a pure gas having almost the same composition as the adsorbed gas at an almost same pressure as that in the adsorption step. Also, by introducing into the column a pure gas having the same composition as the less readily adsorbable gas prior to the introduction of the gas mixture, the less readily absorable gas is recovered in a high pure state in the above gas recovery process.
Inventors
- 👤 T Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:48
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/104; B01D2253/106; B01D2253/112; B01D2253/1124; B01D2253/30; B01D2253/302; B01D2253/304; B01D2256/00; B01D2256/10; B01D2256/12; B01D2256/22; B01D2257/00; B01D2257/10; B01D2257/102; B01D2257/50; B01D2257/504; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40043; B01D2259/4005; B01D2259/40052; B01D2259/40058; B01D2259/4006; B01D2259/401; B01D2259/403; B01D2259/404; B01D53/0476; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
The process as claimed in claim 1 wherein said adsorbent is prepared by dehydrating a tuff mainly consisting of SiO2, Al2O3 and H2O, containing 1-10 percent by weight of alkali metal and alkaline earth metal oxides, and having the X-ray diffraction pattern shown in the preceeding Table I or Table II.
Claim 2
Dependent Claim
24 words
The process as claimed in claim 1 wherein said readily adsorbable gas component is nitrogen and said less readily adsorbable gas component is oxygen.
Claim 3
Dependent Claim
207 words
A process for separating a readily adsorbable gas component and a less readily adsorbable gas component from a gas mixture thereof, which comprises introducing the gas mixture into an adsorption column having an inlet and an outlet, and containing an adsorbent to adsorb the readily adsorbable gas component, while recovering the less readily adsorbable gas component, and then recovering the readily adsorbable gas component by desorbing the component thus adsorbed under reduced pressure, the improvement wherein (1) a substantially pure gas having substantially the same composition as the less readily adsorbable component is introduced into the column prior to the introduction of the gas mixture into the column until the inside pressure of the column becomes substantially the same as the pressure employed in the adsorption step, (2) the adsorption of the readily adsorbable gas component is continued until the composition of the gas at the outlet of the column is substantially the same as the composition of the gas at the inlet of the column, and (3) prior to the desorption step, the inside of the column is purged with a substantially pure gas having substantially the same composition as the readily adsorbable gas component under substantially the same pressure as employed in the adsorption step.
Claim 4
Dependent Claim
51 words
The process as claimed in claim 4 whereIn said adsorbent is preapred by dehydrating a tuff mainly consisting of SiO2, Al2O3 and H2O, containing 1-10 percent by weight of alkali metal or alkaline earth metal oxides, and having the X-ray diffraction pattern shown in the preceeding Table I or Table II.
Claim 5
Dependent Claim
24 words
The process as claimed in claim 4 wherein said readily adsorbable gas component is nitrogen and said less readily adsorbable gas component is oxygen.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |