US3634028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for removing sulfur from gases
Assignee: GEA Group AG
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Filing: 1967-10-23
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Granted: 1972-01-11
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Expires: 1987-10-23
Abstract
Abstract Use of activated carbon; having a steep absorption isotherm, that is carbon having a surface area of about 1,200 to 1,500 square meters per gram, a most frequent (median) pore radius of about 4 to 12 angstroms, a micropore (less than 100-angstrom diameter) volume of about 0.8 cubic centimeters per gram, and a bulk density of up to about 350 grams per liter, as adsorbent for sulfur in sulfur-containing gases; and to regeneration of the adsorbent by treatment thereof with hot, at least about 280* C., inert gases.
Inventors
- 👤 Reinhard Hohne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:38
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0462; C; C10; C10K; C10K1/00; C10K1/32; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/30; B01D2253/302; B01D2253/306; B01D2253/308; B01D2256/00; B01D2256/22; B01D2257/00; B01D2257/30; B01D2259/00; B01D2259/40; B01D2259/40011; B01D2259/40043; B01D2259/4005; B01D2259/40056; B01D2259/40077; B01D2259/40081; B01D2259/40083; B01D2259/40088; B01D2259/4009; B01D2259/403; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
22 words
The improved process claimed in claim 1, wherein said regeneration is carried out at a temperature of about 380* to 480* C.
Claim 2
Dependent Claim
22 words
The improved process claimed in claim 1, wherein said carbon has a bulk density of about 280 to 320 grams per liter.
Claim 3
Dependent Claim
28 words
The improved claimed in claim 1, wherein said inert gas is at least one selected from the group consisting of nitrogen, methane, sulfur-free natural gas and mixtures thereof.
Claim 4
Dependent Claim
22 words
The improved process claimed in claim 1, wherein said inert gas having desorbed sulfur therein is cooled to precipitate said sulfur therefrom.
Claim 5
Dependent Claim
24 words
The improved process claimed in claim 5, wherein said inert gas, relieved of at least part of its sulfur, is recycled to desorption utilization.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |