US3702525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
An improved gas purifying process and apparatus
Assignee: Air Liquide SA
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Filing: 1970-11-30
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Granted: 1972-11-14
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Expires: 1990-11-30
Abstract
Abstract An improved gas purifying process and apparatus, for example, the purification of purging gases originating from an ammonia synthesis installation, with the object of recovering one of the constituents of these gases, for example hydrogen, by means at least one adsorption mass, in which the rise in the pressure following the elution and preceding the isobaric adsorption, is effected in the first chamber by admission of gas to be purified, and is effected simultaneously in the second chamber in two stages, the first of which is a raising of the front to an intermediate pressure by means of a constituent, such as the purified hydrogen, the said isobaric adsorption only starting when the working pressure is reached in the said two chambers, the two chambers being isolated during this operation.
Inventors
- 👤 Guy A Simonet
- 👤 Pierre F Lesur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:46
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/04; C01C1/0405; C01C1/0476; B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/047; B01D53/34; C01B; C01B3/00; C01B3/50; C01B3/56; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/106; B01D2253/108; B01D2253/112; B01D2253/1124; B01D2253/116; B01D2256/00; B01D2256/16; B01D2257/00; B01D2257/40; B01D2257/406; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40013; B01D2259/40015; B01D2259/40043; B01D2259/4005; B01D2259/40052; B01D2259/40058; B01D2259/40062; B01D2259/40077; B01D2259/40081; B01D2259/403; B01D2259/414; B01D2259/4141; B01D53/0407; B01D53/0446; C01B2203/00; C01B2203/04; C01B2203/042; C01B2203/043; C01B2203/0465; C01B2203/048; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A method in accorDance with claim 1 wherein said gases to be purified consist essentially of purging gas originating from ammonia synthesis and wherein the impurities in said ammonia synthesis gas are adsorbed leaving hydrogen with a purity of approximately 99.5 percent.
Claim 2
Dependent Claim
32 words
A process in accordance with claim 2 wherein adsorption is carried out in several parallel lines simultaneously and wherein the complete period of one cycle on each adsorption line is 15 minutes.
Claim 3
Dependent Claim
29 words
A process in accordance with claim 2 wherein said pressure purification is about 38 bars, said regeneration pressure is atmospheric, and wherein said intermediate pressure is about 25 bars.
Claim 4
Dependent Claim
202 words
An adsorption apparatus comprising a plurality of parallel lines, each said line containing a set of said two chambers connected in series, the first of each of said two chambers being smaller and containing a charge of aluminum oxide and the second of said two chambers being larger and containing both active carbon and a molecular sieve, each said line containing an admission valve upstream from said first chamber and having an orifice of 40 mms, a first pipe passing from said first chamber to said second chamber and containing a connecting valve having an orifice of 40 mms., a second pipe exiting from said second chamber and containing a withdraw valve having an orifice of 40 mms., a third pipe passing from said second chamber to said first chamber and containing a second connecting valve having an orifice of 100 mms., a fourth pipe exiting from said first chamber and containing an air connection valve having an orifice of 100 mms., a fifth pipe leading to said second chamber and containing a front raising valve having an orifice of 25 mms. and a sixth pipe passing to said second chamber and containing an elution valve having an orifice of 16 mms.
References Cited (Backward Citations)
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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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |