Patent US3359176A successfully refreshed from Google Patents.
Patent US2566137A successfully refreshed from Google Patents.
US2566137A
Expired / Lapsed
US
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Removing acetylenes from hydrocarbon mixtures and improvements in the separation of butadiene and acetylenes
Assignee: Standard Oil Development Co
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Filing: 1950-03-15
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Granted: 1951-08-28
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Expires: 1970-03-15
Abstract
No abstract record available.
Inventors
- 👤 Charles E Morrell
- 👤 Miller W Swaney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:57
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
AN IMPROVED COPPER AMMONIUM ACETATE ABSORPTION AND PURIFICATION METHOD FOR SEPERATING BUTADIENE FROM A HYDROCARBON MIXTURE CONTAINING BUTADIENE TOGETHER WITH BUTENES AND SMALL AMOUNTS OF ACETYLENES, COMPRISING THE STEPS OF CONTACTING SAID MIXTURE WITH A SOLUTION OF COPPER AMMONIUM ACETATE TO OBTAIN A RICH SOLUTION CONTAINING BUTADIENE AND ACETYLENES, SUBSEQUENTLY HEATING SAID RICH SOLUTION TO DESORB BUTADIENE WHEREBY A LEAN SOLUTION SUBSTANTIALLY FREE OF BUTADIENE IS OBTAINED, EXPOSING SAID LEAN SOLUTION TO CONDITIONS CAUSING POLYMERIZATION OF ACETYLENES, AND WASHING SAID EXPOSED SOLUTION WITH AN OXYGENATED ORGANIC SOLVENT FOR LIQUID OILY POLYMERS FORMED BY THE POLYMERIZATION OF SAID ACETYLENES.
Claim 2
Dependent Claim
98 words
AN IMPROVED COPPER AMMONIUM ACETATE ABSORPTION AND PURIFICATION METHOD FOR SEPERATING BUTADIENE FROM A HYDROCARBON MIXTURE CONTAINING BUTADIENE TOGETHER WITH BUTENES AND SMALL AMOUNTS OF ACETYLENES, COMPRISING THE STEPS OF CONTACTING SAID MIXTURE WITH A SOLUTION OF COPPER AMMONIUM ACETATE TO OBTAIN A RICH SOLUTION CONTAINING BUTADIENE AND ACETYLENES, SUBSEQUENTLY HEATING SAID RICH SOLUTION TO DESORB BUTADIENE WHEREBY A LEAN SOLUTION SUBSTANTIALLY FREE OF BUTADIENE IS OBTAINED, EXPOSING SAID LEAN SOLUTION TO CONDITIONS CAUSING POLYMERIZATION OF ACETYLENES, AND WASHING SAID EXPOSED SOLUTION WITH AN OXYGENATED ORGANIC SOLVENT FOR LIQUID OILY POLYMERS FORMED BY THE POLYMERIZATION OF SAID ACETYLENES.
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) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |