US3846332A
Expired / Lapsed
US
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Azeotropes of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether with acetone, methyl ethylketone and tetrahydrofuran
Assignee: BOC Inc
•
Filing: 1972-09-18
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Granted: 1974-11-05
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Expires: 1992-09-18
Abstract
Abstract Azeotropes of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether and acetone, methyl ethyl ketone or tetrahydrofuran are formed and used to separate this ether from 1-chloro-2,2,2trifluoroethyl difluorochloromethyl ether.
Inventors
- 👤 L Croix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:01
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/50; C11D7/5036; C11D7/504; C11D7/5063
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
28 words
AN AZEOTROPE OF 1-CHLORO-2,2,2-TRIFLUOROETHYL DIFLUOROMETHYL ETHER AND ACETONE HAVING A BOILING POINT OF ABOUT 66*C. AND CONTAINING ABOUT 1.2 MOLES OF ACETONE PER MOLE OF 1-CHLORO-2,2,2-TRIFUORETHYL DIFLUOROOETHYL ETHER.
Claim 2
Dependent Claim
28 words
AN AZEOTROPE OF 1-CHLORO-2,2,2-TRIFLUOROETHYL DIFLUOROMETHYL ETHER AND ACETONE HAVING A BOILING POINT OF ABOUT 66*C. AND CONTAINING ABOUT 1.2 MOLES OF ACETONE PER MOLE OF 1-CHLORO-2,2,2-TRIFUORETHYL DIFLUOROOETHYL ETHER.
Claim 3
Dependent Claim
32 words
An azeotrope of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether and methyl ethyl ketone having a boiling point of about 81*C. and containing about 5.5 moles of methyl ethyl ketone per mole of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether.
Claim 4
Dependent Claim
32 words
An azeotrope of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether and methyl ethyl ketone having a boiling point of about 81*C. and containing about 5.5 moles of methyl ethyl ketone per mole of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether.
Claim 5
Dependent Claim
28 words
An azeotrope of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether and tetrahydrofuran having a boiling point of about 68*C. and containing about 3 moles of tetrahydrofuran per mole of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether.
Claim 6
Dependent Claim
28 words
An azeotrope of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether and tetrahydrofuran having a boiling point of about 68*C. and containing about 3 moles of tetrahydrofuran per mole of 1-chloro-2,2,2-trifluoroethyl difluoromethyl ether.
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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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |