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US4736045A
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Process for fluorinating ethers
Assignee: EA Technology Ltd
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Filing: 1984-01-20
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Granted: 1988-04-05
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Expires: 2004-01-20
Abstract
Abstract PCT No. PCT/GB84/00013 Sec. 371 Date Sep. 11, 1984 Sec. 102(e) Date Sep. 11, 1984 PCT Filed Jan. 20, 1984 PCT Pub. No. WO84/02909 PCT Pub. Date Aug. 2, 1984.Fluorinated ether, process for their preparation, and use of the fluorinated ethers as inert fluids.
Inventors
- 👤 Frederick G. Drakesmith
- 👤 Richard L. Powell
- 👤 Richard D. Chambers
- 👤 Brian Grievson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:59
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/18; C07C; C07C41/00; C07C41/01; C07C41/18; C07C41/22; C07C41/30; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/12; C07C43/123; C07D307/10; C07D309/00; C07D309/02; C07D309/08; C07D319/00; C07D319/10; C07D319/12; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C10; C10M; C10M105/00; C10M105/50; C10M105/54; C10M107/00; C10M107/38; C10M171/00; C10M171/008; C10M2211/00; C10M2211/04; C10M2211/042; C10M2211/06; C10M2213/00; C10M2213/04; C10M2213/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
64 words
A process for the preparation of a fully fluorinated ether, wherein the process comprises forming an adduct comprising a free-radical addition of a fluoro-olefin and a hydrogen-containing ether; and fluorinating the adduct using cobalt trifluoride as a fluorinating agent at a temperature of 300° to 600° C. and substantially avoiding fragmentation of said adduct and thereby controlling the yield of the desired fluorinated ether.
Claim 2
Dependent Claim
64 words
A process for the preparation of a fully fluorinated ether, wherein the process comprises forming an adduct comprising a free-radical addition of a fluoro-olefin and a hydrogen-containing ether; and fluorinating the adduct using cobalt trifluoride as a fluorinating agent at a temperature of 300° to 600° C. and substantially avoiding fragmentation of said adduct and thereby controlling the yield of the desired fluorinated ether.
Claim 3
Dependent Claim
55 words
A process as claimed in claim 1, wherein the hydrogen-containing ether used in the formation of the adduct is of the formula R--O--R' wherein R and R' are hydrocarbon groups or together form a single hydrocarbon group and the total number of carbon atoms in the hydrocarbon groups R and R' is up to 10.
Claim 4
Dependent Claim
32 words
A process as claimed in claim 2, wherein the groups R and R' are the same or different and are selected from the group consisting of methyl, ethyl, propyl and butyl groups.
Claim 5
Dependent Claim
32 words
A process as claimed in claim 1, wherein the hydrogen-containing ether used in the formation of the adduct is of the formula R--O--R' wherein R and R' are halogen containing hydrocarbon groups.
Claim 6
Dependent Claim
27 words
A process as claimed in claim 1, wherein the fluoro-olefin used in the formation of the adduct is selected from the group consisting of tetrafluoroethylene and hexafluoropropene.
Claim 7
Dependent Claim
41 words
A process as claimed in claim 1, wherein the hydrogen-containing ether used in the formulation of the adduct is selected from the group consisting of dimethyl ether, diethyl ether, dipropyl ether, tetrahydrofuran, dioxane, tetrahydrogpyran, trimethylene oxide and ethylene glycol dimethyl ether.
Claim 8
Dependent Claim
25 words
A process as claimed in claim 1, wherein the fluorination is effected using a mixture of cobalt trifluoride and potassium fluoride as the fluorinating agent.
Claim 9
Dependent Claim
22 words
A process as claimed in claim 7, wherein the temperature employed is in the range of from 400° C. to 450° C.
Claim 10
Dependent Claim
25 words
A process as claimed in claim 1, wherein the mole ratio of the fluoro-olefin to the hydrogen-containing ether in the adduct is 6:1 to 1:1.
Claim 11
Dependent Claim
25 words
A process as claimed in claim 1, wherein the mole ratio of the fluoro-olefin to the hydrogen-containing ether in the adduct is 2:1 to 1:1.
Claim 12
Dependent Claim
19 words
Process as claimed in claim 1, wherein the adduct is fluorinated at a temperature of 400° to 500° C.
Claim 13
Dependent Claim
23 words
Process as claimed in claim 1, wherein the adduct is fluorinated at a temperature in the range of from 400° to 450° C.
Claim 14
Dependent Claim
18 words
Process as claimed in claim 1, wherein the adduct is fluorinated at a temperature of about 440° C.
Claim 15
Dependent Claim
124 words
A process for the preparation of a fully fluorinated ether, wherein the process comprises forming an adduct comprising free-radical addition of a fluoro-olefin and a hydrogen-containing ether, wherein the mole ratio of fluoro-olefin to hydrogen-containing ether in the adduct is from 6:1 to 1:1; fluorinating the adduct using a fluorinating agent comprising cobalt trifluoride at a temperature of 300° to 600° C.; wherein the fluoro-olefin is selected from the group consisting of difluoroethylene, trifluoroethylene, tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropene and perfluorocyclobutene; and wherein the hydrogen-containing ether is selected from the group consisting of dimethyl ether, diethyl ether, dipropyl ether, tetrahydrofuran, dioxane, tetrahydropyran, trimethylene oxide and ethylene glycol dimethyl ether, and substantially avoiding fragmentation of said adduct and thereby controlling the yield of the desired fluorinated ether.
Claim 16
Dependent Claim
124 words
A process for the preparation of a fully fluorinated ether, wherein the process comprises forming an adduct comprising free-radical addition of a fluoro-olefin and a hydrogen-containing ether, wherein the mole ratio of fluoro-olefin to hydrogen-containing ether in the adduct is from 6:1 to 1:1; fluorinating the adduct using a fluorinating agent comprising cobalt trifluoride at a temperature of 300° to 600° C.; wherein the fluoro-olefin is selected from the group consisting of difluoroethylene, trifluoroethylene, tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropene and perfluorocyclobutene; and wherein the hydrogen-containing ether is selected from the group consisting of dimethyl ether, diethyl ether, dipropyl ether, tetrahydrofuran, dioxane, tetrahydropyran, trimethylene oxide and ethylene glycol dimethyl ether, and substantially avoiding fragmentation of said adduct and thereby controlling the yield of the desired fluorinated ether.
Claim 17
Dependent Claim
30 words
Process as claimed in claim 14, wherein the fully fluorinated ether is in a mixture of fluorinated ethers in which at least one ether in the mixture is fully fluorinated.
Claim 18
Dependent Claim
19 words
Process as claimed in claim 14, wherein the adduct is fluorinated at a temperature of 400° to 500° C.
Claim 19
Dependent Claim
21 words
Process as claimed in claim 16, wherein the fluorinating agent consists essentially of a mixture of cobalt trifluoride and potassium fluoride.
Claim 20
Dependent Claim
23 words
Process as claimed in claim 14, wherein the adduct is fluorinated at a temperature in the range of from 400° to 450° C.
References Cited (Backward Citations)
US2644823A
Cited
US3816286A
Cited
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