Patent US4038332A successfully refreshed from Google Patents.
US4038332A
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US
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Separation of ethyl fluoride
Assignee: Phillips Petroleum Co
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Filing: 1975-10-09
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Granted: 1977-07-26
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Expires: 1995-10-09
Abstract
Abstract An overall process for the separation of ethyl fluoride from a propane stream containing same is provided wherein said propane stream is extractively distilled using HF, as the extractive solvent producing a first mixture consisting essentially of propane and HF and a second mixture consisting essentially of ethylfluoride and HF, and wherein this second mixture is then mixed with water followed by phase separation.
Inventors
- 👤 C. O. Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:36
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C7/00; C07C7/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A process for separating ethyl-fluoride from an ethyl fluoride containing propane stream comprising a. introducing said ethyl fluoride containing propane stream into an ethyl fluoride extraction zone, b. introducing a dry liquid HF stream into said ethyl fluoride extraction zone to extract ethyl fluoride from said ethyl fluoride containing propane stream, c. withdrawing a first stream comprising propane and being essentially free of ethyl fluoride from said ethyl fluoride extraction zone, d. withdrawing a second stream comprising ethyl fluoride and HF from said ethyl fluoride extraction zone, e. mixing said second stream with an aqueous extractant consisting esentially of to form a mixture, and f. separating said mixture into a first phase consisting essentially of ethyl fluoride and into a second phase consisting essentially of HF and water.
Claim 2
Dependent Claim
128 words
A process for separating ethyl-fluoride from an ethyl fluoride containing propane stream comprising a. introducing said ethyl fluoride containing propane stream into an ethyl fluoride extraction zone, b. introducing a dry liquid HF stream into said ethyl fluoride extraction zone to extract ethyl fluoride from said ethyl fluoride containing propane stream, c. withdrawing a first stream comprising propane and being essentially free of ethyl fluoride from said ethyl fluoride extraction zone, d. withdrawing a second stream comprising ethyl fluoride and HF from said ethyl fluoride extraction zone, e. mixing said second stream with an aqueous extractant consisting esentially of to form a mixture, and f. separating said mixture into a first phase consisting essentially of ethyl fluoride and into a second phase consisting essentially of HF and water.
Claim 3
Dependent Claim
23 words
A process in accordance with claim 1 comprising fractionally distilling said second phase to form a dry HF stream and a water stream.
Claim 4
Dependent Claim
33 words
A process in accordance with claim 2 comprising recycling said water stream as said extractant in step e, and recycling said dry HF stream into said ethyl fluoride extraction zone in step (b).
Claim 5
Independent Claim
74 words
A method for separating ethyl fluoride from a first mixture consisting essentially of ethyl fluoride and HF, which comprises a. contacting said first mixture with an aqueous extractant consisting essentially of water to produce a second mixture consisting essentially of ethyl fluoride, HF and said aqueous extractant and, b. phase separating said second mixture into a first phase consisting essentially of ethyl fluoride, and into a second phase consisting essentially of HF and water.
Claim 6
Independent Claim
74 words
A method for separating ethyl fluoride from a first mixture consisting essentially of ethyl fluoride and HF, which comprises a. contacting said first mixture with an aqueous extractant consisting essentially of water to produce a second mixture consisting essentially of ethyl fluoride, HF and said aqueous extractant and, b. phase separating said second mixture into a first phase consisting essentially of ethyl fluoride, and into a second phase consisting essentially of HF and water.
Claim 7
Dependent Claim
40 words
The method of claim 4 also including the steps of a. fractionating said second phase into a dry HF stream and into a water comprising stream, and b. utilizing said water-comprising stream as said aqueous extractant for said first mixture.
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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) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |