US3745093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating hexafluoroacetone from hydrogen fluoride
Assignee: EIDP Inc
•
Filing: 1970-07-17
•
Granted: 1973-07-10
•
Expires: 1990-07-17
Abstract
Abstract Process for separating hexafluoroacetone from hydrogen fluoride by vaporizing a hexafluoroacetone-hydrogen fluoride addition complex and subjecting the vaporized complex to non-equilibrium condensation.
Inventors
- 👤 K Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:57
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; C07C45/51; C07C45/511; C07C45/512; C07C45/85
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
22 words
A process according to claim 1 wherein the vaporization and condensation are carried out in the presence of a non-condensable inert diluent.
Claim 2
Dependent Claim
11 words
A process according to claim 2 wherein the diluent is nitrogen.
Claim 3
Dependent Claim
24 words
A process according to claim 1 comprising additionally heating the vaporized complex to a temperature of from about 35* C. to about 200* C.
Claim 4
Dependent Claim
26 words
A process according to claim 1 wherein the vaporization and condensation are carried out within a pressure range of from 1 atmosphere to about 30 atmospheres.
Claim 5
Dependent Claim
27 words
A process according to claim 5 wherein the vaporization and condensation are carried out within a pressure range of from about 10 atmospheres to about 16 atmospheres.
Claim 6
Dependent Claim
27 words
A process according to claim 6 wherein the vaporization and condensation are carried out within a pressure range of from about 12 atmospheres to about 15 atmospheres.
Claim 7
Dependent Claim
21 words
A process according to claim 1 wherein the vaporization is carried out at a temperature above the critical temperature of hexafluoroacetone.
Claim 8
Dependent Claim
17 words
A process according to claim 8 wherein the vaporization is carried out at greater than atmospheric pressure.
Claim 9
Dependent Claim
49 words
A process according to claim 1 wherein the vaporization and condensation are carried out within a pressure range of from about 10 atmospheres to about 30 atmospheres and wherein said vaporization is carried out at a temperature within the range of from about 65* C. to about 120* C.
Claim 10
Dependent Claim
47 words
A process according to claim 10 wherein the vaporization and condensation are carried out within a pressure range of from about 12 atmospheres to about 15 atmospheres and wherein said vaporization is carried out within a temperature range of from about 80* C. to about 90* C.
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |