Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1993-03-30
1994-10-04
Richter, Johann
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544106, 549511, 564497, 564498, 564510, 564 2, 568580, 568581, 568682, 568 19, 568 24, 568 65, 570118, 570134, 570177, C07D26500, C07C20984, C07C 4134, C07C 1738
Patent
active
053527852
ABSTRACT:
A process for the purification of a perfluorochemical composition comprises continuously mixing the perfluorochemical composition, comprising a liquid mixture of inert perfluorochemicals (e.g., perfluoroalkanes, perfluoroethers, perfluoroaminoethers, or perfluoroalkyl tertiary amines) and isomeric fluorohydrochemicals, with a stabilization composition comprising water-miscible alkanol and an aqueous solution of base (such as potassium hydroxide) made by dissolving the base in an amount of water sufficient to dissolve or disperse the fluoride salt by-products of the subsequent reaction of the base with the fluorohydrochemicals to form fluoroolefins, the amount of the alkanol in the stabilization composition being in stoichiometric excess of the amount needed to completely convert the fluoroolefins to alkoxyvinyl ethers. The process can be utilized to purify the product mixtures resulting from fluorination methods such as direct fluorination or ECF.
REFERENCES:
patent: 3737470 (1973-06-01), Cottle
patent: 4029552 (1977-06-01), Fozzard
patent: 4035250 (1977-07-01), Walters et al.
patent: 4618731 (1986-10-01), Beck
patent: 4766261 (1988-08-01), Bierl
patent: 4929317 (1990-05-01), Nishimura et al.
patent: 5093432 (1992-03-01), Bierschenk et al.
Arcus et al., Testing for Chemical Inertness in Electronic Coolants, Int. Electronic Circuit Packaging Symposium, 10th Symposium, paper 2/4, 1969.
R. J. Kaufman, "Medical Oxygen Transport Using Perfluorochemicals," Biotechnology of Blood, edited by J. Goldstein, Chapter 7, pp. 127-162, Butterworth-Heinemann, Stoneham, Mass. (1991).
Kirk-Othmer Encyclopedia of Chemical Technology, Third Edition, vol. 10, pp. 874-881 (especially, p. 878), John Wiley & Sons, New York (1980).
Moore et al., J. Fluorine Chem. 32, 41 (1986).
Nishimura et al., J. Printed Circuitry 6 (4), 203 (1991).
Fletcher Robert B.
Henderson Randall F.
Herzberg Thomas C.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Page Margaret J.
Richter Johann
LandOfFree
Continuous process for purifying perfluorochemical compositions does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Continuous process for purifying perfluorochemical compositions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous process for purifying perfluorochemical compositions will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-582418