Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Reexamination Certificate
2007-04-03
2010-06-01
Parsa, Jafar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
C570S238000
Reexamination Certificate
active
07728183
ABSTRACT:
A process is disclosed for reducing the mole ratio of (1) compounds of the formula Y1Y2C═CF2wherein Y1and Y2are each independently H, F, Cl, Br, C1-C6alkyl or C1-C6haloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent to (2) saturated compounds of the formula CdHeFfClgBrhIkwherein d is an integer from 1 to 10, and e+f+g+h+k is equal to 2d+2, provided that g is 0, 1, 2 or 3, h is 0, 1 or 2 and k is 0 or 1 and/or unsaturated compounds of the formula Y3Y4C═CY5Y6, wherein Y3, Y5and Y6are each independently H, F, Cl, Br, C1-C6alkyl or C1-C6haloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent, provided that Y5and Y6are not both F, and Y4is C1-C6alkyl or C1-C6haloalkyl containing no more than 3 chlorine substituents, 2 bromine substituents and 1 iodo substituent, in a mixture. The process involves contacting the mixture with at least one selective removal agent selected from the group consisting of SO3and RSO3H, wherein R is selected from the group consisting of F, Cl, OH, C1-C8alkyl, C1-C8fluoroalkyl, and C1-C8fluoroalkoxyalkyl containing no more than two ether oxygens to selectively react the formula Y1Y2C═CF2compounds.
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English-language abstract for SU 1766912 A1, Nov. 30, 1993.
Cherstkov Victor Filippovich
Delyagina Nina Ivanova
Nappa Mario Joseph
Sievert Allen Capron
E.I. du Pont de Nemours and Company
Parsa Jafar
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