US3926591A
Expired / Lapsed
US
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Regeneration of scrubbing agent used for the removal of co' 2 'and h' 2's from gases containing polymerizable hydrocarbons
Assignee: Linde GmbH
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Filing: 1973-12-06
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Granted: 1975-12-16
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Expires: 1993-12-06
Abstract
Abstract A system for the purification of a gas containing a thermally polymerizable diolefin, e.g., propadiene, and at least one acidic component such as carbon dioxide or hydrogen sulfide, by: A. SCRUBBING A GAS SUCH AS A CRACKED HYDROCARBON GAS, WITH NORMALLY LIQUID, ALKALINE, HEAT-REGENERABLE SCRUBBING AGENT SUCH AS AN AQUEOUS SOLUTION OF TRIETHANOLAMINE; B. EXTRACTING THE LOADED SCRUBBING AGENT WITH A LIQUID HYDROCARBON SOLVENT TO REMOVE A SUBSTANTIAL PORTION OF DIOLEFIN, AND SEPARATING THE RESULTANT DIOLEFIN-LOADED HYDROCARBON SOLVENT FROM THE LOADED SCRUBBING AGENT, THE LATTER CONTAINING RESIDUAL DIOLEFIN; C. THERMALLY REGENERATING THE LOADED SCRUBBING AGENT IN A REGENERATING COLUMN TO FORM A GASEOUS OVERHEAD CONTAINING THE ACIDIC COMPONENT AND RESIDUAL DIOLEFIN, AND A BOTTOM LIQUID OF REGENERATED SCRUBBING AGENT; AND D. COOLING THE GASEOUS OVERHEAD TO FORM A CONDENSATE CONTAINING SAID RESIDUAL THERMALLY POLYMERIZABLE DIOLEFIN, AND PREVENTING RESULTANT CONDENSATE FROM BEING REFLUXED INTO SAID REGENERATING COLUMN, THEREBY MITIGATING THE EXTENT OF POLYMERIZATION OF SAID THERMALLY POLYMERIZABLE DIOLEFIN WITHIN SAID REGENERATION COLUMN, AND RECYCLING THE CONDENSATE TO THE LOADED SCRUBBING AGENT PRIOR TO THE EXTRACTION THEREOF WITH HYDROCARBON SOLVENT.
Inventors
- 👤 Alfred Wildmoser
- 👤 Erich Dannhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:37
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; B; B01; B01D; B01D53/00; B01D53/14; B01D53/1425; B01D53/1456; B01D53/1462; C07; C07C; C07C7/00; C07C7/11; B01D2257/00; B01D2257/70; B01D2257/702; B01D2257/7022; Y; Y02; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
214 words
IN A PROCESS FOR THE PURIFICATION OF GAS CONTAINING A MAJOR PORTION OF HYDROCARBON A THERMALLY POLYMERIZABLE DIOLEFIN AND AT LEAST ONE ACIDIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE, WHICH PROCESS COMPRISES: A. SCRUBBING SAID GAS WITH NORMALLY LIQUID, ALKALINE, HEATREGENERATED SCRUBBING MEANS CAPABLE OF REMOVING THE ACIDIC COMPONENT AND DISSOLVING AT LEAST A PORTION OF SAID POLYMERIZEABLE DIOLEFIN TO FORM LOADED SCRUBBING MEANS CONTAINING SAID ACIDIC COMPONENT AND SIAD POLYMERIZEABLE DIOLEFIN; B. CONTACTING SAID LOADED SCRUBBING MEANS WITH LIQUID HYDROCARBON SOLVENT TO EXTRACT OUT THAN 100% OF SAID THERMALLY POLYMERIZABLE DIOLEFINE, AND SEPARATING RESULTANT LOADED HYDROCARBON SOLVENT FROM RESULTANT HYDROCARBON TREATED SCRUBBING MEANS AND C. THERMALLY REGENERATING SAID RESULTANT HYDROCARBON TREATED LOADED SCRUBBING MEANS IN A REGENERATING COLUMN TO FORM A GASEOUS OVERHEAD CONTAINING SAID AT LEAST ONE ACIDIC COMPONENT AND RESIDUAL THERMALLY POLYMERIZABLE DIOLEFIN, AND A BOTTOMS OF REGENERATED SCRUBBING MEANS, THE IMPROVEMENT WHEREIN SAID GASEOUS OVERHEAD IS COOLED TO FORM A CONDENSATE CONTAINING SAID RESIDUAL THERMALLY POLYMERIZABLE DIOLEFIN, AND PREVENTING RESULTANT CONDENSATE FROM BEING REFLUXED INTO SAID REGENERATING COLUMN THEREBY MIGITATING THE EXTEND OF POLYMERIZATION OF SAID THERMALLY POLYMERIZABLE DIOLEFIN WITHIN SAID REGENERATION COLUMN AND WHEREIN SAID CONDENSATE IS RECYCLED TO THE LOADED SCRUBBING MEANS IMMEDIATELY PRIOR TO THE CONTACTING THEREOF WITH SAID HYDROCARBON SOLVENT.
Claim 2
Dependent Claim
214 words
IN A PROCESS FOR THE PURIFICATION OF GAS CONTAINING A MAJOR PORTION OF HYDROCARBON A THERMALLY POLYMERIZABLE DIOLEFIN AND AT LEAST ONE ACIDIC COMPONENT SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE AND HYDROGEN SULFIDE, WHICH PROCESS COMPRISES: A. SCRUBBING SAID GAS WITH NORMALLY LIQUID, ALKALINE, HEATREGENERATED SCRUBBING MEANS CAPABLE OF REMOVING THE ACIDIC COMPONENT AND DISSOLVING AT LEAST A PORTION OF SAID POLYMERIZEABLE DIOLEFIN TO FORM LOADED SCRUBBING MEANS CONTAINING SAID ACIDIC COMPONENT AND SIAD POLYMERIZEABLE DIOLEFIN; B. CONTACTING SAID LOADED SCRUBBING MEANS WITH LIQUID HYDROCARBON SOLVENT TO EXTRACT OUT THAN 100% OF SAID THERMALLY POLYMERIZABLE DIOLEFINE, AND SEPARATING RESULTANT LOADED HYDROCARBON SOLVENT FROM RESULTANT HYDROCARBON TREATED SCRUBBING MEANS AND C. THERMALLY REGENERATING SAID RESULTANT HYDROCARBON TREATED LOADED SCRUBBING MEANS IN A REGENERATING COLUMN TO FORM A GASEOUS OVERHEAD CONTAINING SAID AT LEAST ONE ACIDIC COMPONENT AND RESIDUAL THERMALLY POLYMERIZABLE DIOLEFIN, AND A BOTTOMS OF REGENERATED SCRUBBING MEANS, THE IMPROVEMENT WHEREIN SAID GASEOUS OVERHEAD IS COOLED TO FORM A CONDENSATE CONTAINING SAID RESIDUAL THERMALLY POLYMERIZABLE DIOLEFIN, AND PREVENTING RESULTANT CONDENSATE FROM BEING REFLUXED INTO SAID REGENERATING COLUMN THEREBY MIGITATING THE EXTEND OF POLYMERIZATION OF SAID THERMALLY POLYMERIZABLE DIOLEFIN WITHIN SAID REGENERATION COLUMN AND WHEREIN SAID CONDENSATE IS RECYCLED TO THE LOADED SCRUBBING MEANS IMMEDIATELY PRIOR TO THE CONTACTING THEREOF WITH SAID HYDROCARBON SOLVENT.
Claim 3
Dependent Claim
19 words
A process as defined by claim 1 wherein said thermally polymerizable diolefin is propadiene, butadiene, cyclopentadiene or mixtures thereof.
Claim 4
Dependent Claim
19 words
A process as defined by claim 2 wherein the thermal regeneration is conducted at 95* C to 120* C.
Claim 5
Dependent Claim
18 words
A process as defined by claim 3 wherein said condensate is cooled down to at least 50* C.
Claim 6
Dependent Claim
36 words
A process as defined by claim 4 wherein said scrubbing means is an aqueous solution of potash, sodium hydroxide, potassium hydroxide, mono-, di-, or triethanolamine, or an aqueous solution of the potassium salt of N-methylaminopropionic acid.
Claim 7
Dependent Claim
19 words
A process as defined by claim 1 wherein the thermal regeneration is conducted at 95* C to 120* C.
Claim 8
Dependent Claim
18 words
A process as defined by claim 6 wherein said condensate is cooled down to at least 50* C.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |