Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1994-07-29
1995-04-25
Mars, Howard T.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C07C 4118
Patent
active
054100950
ABSTRACT:
A process for the manufacture of pentafluorodimethyl ether is disclosed which involves contacting at least one starting compound selected from the group consisting of compounds having a formula (CF.sub.3 OCF.sub.2 CO.sub.2)A and compounds having he formula (CF.sub.3 OCF.sub.2 CO.sub.2).sub.2 A' wherein A is selected from the group consisting of hydrogen, ammonium, alkali metals (e.g., sodium or potassium) and R (wherein R is a C.sub.1 to C.sub.4 alkyl group) and A' is an selected from the group consisting of alkaline-earth metals (e.g., magnesium or calcium), with at least one hydroxylic compound selected from the group consisting of water, mono-alcohols of the formula R'OH (wherein R' is a C.sub.1 to C.sub.12 straight or branched chain alkyl group) and alkanediols of the formula R" (OH).sub.2 (wherein R" is a C.sub.2 to C.sub.8 alkylene group) at temperature of about 120.degree. C. to 170.degree. C.
REFERENCES:
LaZerte, J. D. et al, Pyroleses of the Salts of Perfluoro Carboxylic Acids, 75, 4525-4528 (Sep. 20, 1953).
Schack, C. J. et al, J. of Fluorine Chemistry, 14, 519-522 (1979).
Berenblit, V. V. et al, "The Nature of the Products of the Electrochemical Fluorination of Ethers of Ethylene Glycol", Trans. from Zhurnal Organicheskoi Khimii, 10 (10), 2031-2035, Oct. 1974.
Berenblit, V. V. et al, "Electrochemical Fluorination of Alkoxycarboxylic Acids", Trans. from Zhurnal Prikladnoi Khimii, 47(11), 2433-2435, Nov., 1974.
Resnick Paul R.
Sievert Allen C.
E. I. Du Pont de Nemours and Company
Mars Howard T.
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