Title:
METHOD OF REMOVING HEXAFLUOROPROPYLENE DIMERS
Document Type and Number:
WIPO Patent Application WO2004094025
Kind Code:
A3
Abstract:
A method of removing hexafluoropropylene dimers ("HFP dimers"), dimer hydrides and other oligomers from a fluid is described. The method comprises heating the fluid to isomerize the HFP dimers to the thermodynamic isomer, and contacting the fluid with a tertiary amine (or salts thereof) to form a hexafluoropropylene dimer - tertiary amine adduct. The method may further comprise the step of separating the dimer adducts from the reaction mixture.
Inventors:
ZHANG ZHONGXING (US)
QIU ZAI-MING (US)
VITCAK DANIEL R (US)
FLYNN RICHARD M (US)
QIU ZAI-MING (US)
VITCAK DANIEL R (US)
FLYNN RICHARD M (US)
Application Number:
PCT/US2004/006113
Publication Date:
March 30, 2006
Filing Date:
February 27, 2004
Export Citation:
Assignee:
3M INNOVATIVE PROPERTIES CO (US)
International Classes:
C07C17/358; C07C17/395; C07C41/44; C07C45/00; C07C45/67; C07C45/85; (IPC1-7): C07C17/358; C07C17/395; C07C21/18; C07C41/44; C07C45/00; C07C49/167; C07C45/67; C07C45/85
Domestic Patent References:
| WO2003022981A1 | 2003-03-20 |
Foreign References:
| US2738371A | 1956-03-13 |
Other References:
RUDIGER S ET AL: "On reactions of carbon disulphide induced by @?naked@? fluoride Part 2: Reactions with 2-H-heptafluoropropane, hexafluoropropene, and bis(2,2,2-trifluoroethyl)amine", JOURNAL OF FLUORINE CHEMISTRY, ELSEVIER SEQUOIA. LAUSANNE, CH, vol. 82, no. 1, April 1997 (1997-04-01), pages 29 - 32, XP004064243, ISSN: 0022-1139
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