US4038332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ethyl fluoride
Assignee: Phillips Petroleum Co
•
Filing: 1975-10-09
•
Granted: 1977-07-26
•
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 03:21
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.
References Cited (Backward Citations)
US2759032A
Cited
US3204010A
Cited
US3204011A
Cited
US3751517A
Cited
US3761540A
Cited
US3767727A
Cited
US3825616A
Cited
US3763265A
Cited
US3767726A
Cited
US3864423A
Cited
USB426674I5
Cited
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 |