US3772852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation or concentration of gaseous mixture
Assignee: Individual
•
Filing: 1970-06-16
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Granted: 1973-11-20
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Expires: 1990-06-16
Abstract
Abstract The present invention provides a process for selectively separating or concentrating a specific gas or gases from a gas mixture by contacting said mixture at a room temperature under a normal pressure with an adsorbent prepared by activating at a temperature of about 350* to 700*C. a rock or mineral having the chemical composition mainly consisting of SiO2, Al2O3 and H2O and containing 1 to 10 percent by weight of the total of K2O, Na2O and CaO and also having the X-ray diffraction image shown in Table A or Table B of the specification.
Inventors
- 👤 T Tamura
- 👤 H Minato
- 👤 T Ishiko
- 👤 Y Shindou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:39
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12; B; B01; B01D; B01D53/00; B01D53/34; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; C01B; C01B13/00; C01B13/02; C01B13/0229; C01B13/0248; C01B13/0259; C01B13/0262; C01B13/027; C01B21/00; C01B21/04; C01B21/0405; C01B21/0433; C01B21/045; C01B21/0455; C01B21/0466; C01B3/00; C01B3/50; C01B3/56; C01B32/00; C01B32/40; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B2203/00; C01B2203/04; C01B2203/042; C01B2203/0465; C01B2203/0495; C01B2210/00; C01B2210/0043; C01B2210/005; C01B2210/0065; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A process for selectively separating NH3 from a gas mixture of NH3, N2 and H2 which comprises contacting an adsorbent with said gas mixture at room temperature and normal pressure to adsorb NH3 therefrom, and heating said adsorbent to effect desorption of NH3 therefrom, said adsorbent being prepared by heating a naturally-occurring rock at a temperature of 350* to 700*C to activate the same, said rock having a chemical composition consisting essentially of SiO2, Al2O3 and H2O and containing 1 to 10 percent by weight of the total of K2O, Na2O and CaO and also having an X-ray diffraction image selected from the group consisting of those shown in Table A and Table B of the specification.
Claim 2
Dependent Claim
116 words
A process for selectively adsorbing water from air or hydrogen containing water which comprises contacting an adsorbent with air or moist hydrogen at room temperature and normal pressure to adsorb water therefrom and then heating said adsorbent to effect desorption of said water, said adsorbent being prepared by heating a naturally-occurring rock at a temperature of 350* to 700*C to activate the same, said rock having a chemical composition consisting essentially of SiO2, Al2O3 and H2O and containing 1 to 10 percent by weight of the total of K2O, Na2O and CaO and also having an X-ray diffraction image selected from the group consisting of those shown in Table A and Table B of the specification.
References Cited (Backward Citations)
US2882244A
Cited
US2882243A
Cited
US2988503A
Cited
US3012853A
Cited
US3130007A
Cited
US3473296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |