US4293322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distillative separation of carbon dioxide from hydrogen sulfide
Assignee: PROCESS SYSTEMS INTERNATIONAL Inc A CORP OF MASSACHUSETTS
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Filing: 1980-04-23
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Granted: 1981-10-06
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Expires: 2000-04-23
Abstract
Abstract A distillative separation of carbon dioxide and hydrogen sulfide is improved by adding a C 3 -C 6 alkane, a mixture of C 3 -C 6 alkanes, SO 2 or SO 3 to a distillation column to increase the relative volatility of carbon dioxide to hydrogen sulfide. Increasing the relative volatility facilitates the separation.
Inventors
- 👤 James M. Ryan
- 👤 Arthur S. Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:55
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/143; B01D3/146; B01D3/32; B01D3/322; B01D3/34; C; C01; C01B; C01B17/00; C01B17/16; C01B17/167; C01B17/168; C01B32/00; C01B32/50; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y10; Y10S; Y10S62/00; Y10S62/922; Y10S62/928
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
62 words
In a separation of carbon dioxide from hydrogen sulfide in a distillation column, the improvement of adding an agent for raising the relative volatility of carbon dioxide to hydrogen sulfide to said column at a point above the feed, said agent comprising a C 3 -C 6 alkane, a mixture of C 3 -C 6 alkanes, SO 2 or SO 3 .
Claim 2
Dependent Claim
62 words
In a separation of carbon dioxide from hydrogen sulfide in a distillation column, the improvement of adding an agent for raising the relative volatility of carbon dioxide to hydrogen sulfide to said column at a point above the feed, said agent comprising a C 3 -C 6 alkane, a mixture of C 3 -C 6 alkanes, SO 2 or SO 3 .
Claim 3
Independent Claim
99 words
A method for separating carbon dioxide from a mixture containing carbon dioxide and hydrogen sulfide, comprising: a. introducing said mixture into a distillation column containing a plurality of vapor-liquid contact devices; b. operating said distillation column at conditions of pressure, temperature and composition sufficient to produce an enriched carbon dioxide overhead stream and an enriched hydrogen sulfide bottoms stream; and, c. introducing into said distillation column at a location above the feed point thereof a C 3 -C 6 alkane or mixture of C 3-C 6 alkanes, to thereby increase the relative volatility of carbon dioxide to hydrogen sulfide.
Claim 4
Independent Claim
99 words
A method for separating carbon dioxide from a mixture containing carbon dioxide and hydrogen sulfide, comprising: a. introducing said mixture into a distillation column containing a plurality of vapor-liquid contact devices; b. operating said distillation column at conditions of pressure, temperature and composition sufficient to produce an enriched carbon dioxide overhead stream and an enriched hydrogen sulfide bottoms stream; and, c. introducing into said distillation column at a location above the feed point thereof a C 3 -C 6 alkane or mixture of C 3-C 6 alkanes, to thereby increase the relative volatility of carbon dioxide to hydrogen sulfide.
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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |