US4330305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of CO2 and/or H2 S from gases
Assignee: BASF SE
•
Filing: 1978-06-05
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Granted: 1982-05-18
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Expires: 1998-06-05
Abstract
Abstract Acid constituents, eg. H 2 S and CO 2 or their mixtures, are removed from industrial gases or natural gases by means of a washing agent which contains the methyl isopropyl ethers of polyethylene glycols. The washing can be carried out with simultaneous drying of the gas, especially in the case of natural gases, since the anhydrous ethers are able to absorb water.
Inventors
- 👤 Klaus Kuessner
- 👤 Rudolf Irnich
- 👤 Hans-Georg Scharpenberg
- 👤 Klaus Volkamer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:44
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D53/1493; C; C07; C07C; C07C7/00; C07C7/11; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
58 words
A process for removing H 2 S or CO 2 or both from a gaseous mixture containing H 2 S or CO 2 or both which comprises washing the gases under pressure with a solvent comprising polyethylene glycol methyl isopropyl ethers containing from 3 to 7 [--CH 2 CH 2 --O--] units, with subsequent regeneration of the solvent.
Claim 2
Dependent Claim
58 words
A process for removing H 2 S or CO 2 or both from a gaseous mixture containing H 2 S or CO 2 or both which comprises washing the gases under pressure with a solvent comprising polyethylene glycol methyl isopropyl ethers containing from 3 to 7 [--CH 2 CH 2 --O--] units, with subsequent regeneration of the solvent.
Claim 3
Dependent Claim
48 words
A process according to claim 1, wherein the mixture of polyethylene glycol methyl isopropyl ethers has been obtained by reacting mixing of polyethylene glycol monomethyl ethers containing from 3 to 7 [--CH 2 CH 2 --O--] units in the presence of strongly acid cation exchange resins with propylene.
Claim 4
Dependent Claim
25 words
A process according to claim 2 wherein the mixture of polyethylene glycol monomethyl ethers contains from 3 to 5 [--CH 2 CH 2 --O--] units.
Claim 5
Dependent Claim
229 words
A process for removing H 2 S or CO 2 or both from gaseous mixture containing H 2 S or CO 2 or both which comprises (a) contacting said gaseous mixture in a first zone with a solvent comprising a mixture of polyethylene glycol methyl isopropyl ethers containing from 3 to 7 [--CH 2 CH 2 --O--] units to effect absorption of substantially all of the H 2 S or CO 2 or both and a minor portion of other gases, (b) passing the solvent containing the absorbed gases to a second zone maintained at a pressure substantially lower than that in the absorption zone to effect liberation of at least a portion of the absorbed gases, (c) withdrawing from said second zone gases liberated therein, (d) withdrawing solvent containing H 2 S or CO 2 or both from said second zone, (e) and introducing the solvent to a third zone to effect removal of substantially all of the H 2 S or CO 2 or both therefrom by heating the solvent or by stripping with steam or inert gases or by heating and stripping, (f) returning at least a portion of the desorbed solvent to the top of the absorption zone after adjusting the water content to not more than 8% by weight, based on the solvent, if steam has been added to the solvent in step (e).
Claim 6
Dependent Claim
229 words
A process for removing H 2 S or CO 2 or both from gaseous mixture containing H 2 S or CO 2 or both which comprises (a) contacting said gaseous mixture in a first zone with a solvent comprising a mixture of polyethylene glycol methyl isopropyl ethers containing from 3 to 7 [--CH 2 CH 2 --O--] units to effect absorption of substantially all of the H 2 S or CO 2 or both and a minor portion of other gases, (b) passing the solvent containing the absorbed gases to a second zone maintained at a pressure substantially lower than that in the absorption zone to effect liberation of at least a portion of the absorbed gases, (c) withdrawing from said second zone gases liberated therein, (d) withdrawing solvent containing H 2 S or CO 2 or both from said second zone, (e) and introducing the solvent to a third zone to effect removal of substantially all of the H 2 S or CO 2 or both therefrom by heating the solvent or by stripping with steam or inert gases or by heating and stripping, (f) returning at least a portion of the desorbed solvent to the top of the absorption zone after adjusting the water content to not more than 8% by weight, based on the solvent, if steam has been added to the solvent in step (e).
Claim 7
Dependent Claim
25 words
A process according to claim 4 wherein the mixture of polyethylene glycol monomethyl ethers contains from 3 to 5 [--CH 2 CH 2 --O--] units.
References Cited (Backward Citations)
US2139375A
Cited
US2649166A
Cited
US3362133A
Cited
US3533732A
Cited
US3590555A
Cited
US3589104A
Cited
GB1429396A
Cited
US3824766A
Cited
US3837143A
Cited
US3915674A
Cited
US4011066A
Cited
DE2544569A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |