Process for production of 3,4-dichlorobutene-1

Details Process for production of 3,4-dichlorobutene-1 Process for production of 3,4-dichlorobutene-1

2011-01-18

2011-01-18

Parsa, Jafar (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

Reexamination Certificate

active

07872163

ABSTRACT:
3,4-Dichlorobutene-1 is produced by a process comprising the step of contacting 1,4-dichlorobutene-2 with either 1) a ferric carboxylate catalyst of the formulawhere R is an alkyl or alkenyl group of 4-18 carbon atoms, a cycloalkyl or cycloalkenyl group of 6-18 carbon atoms or an aryl group selected from phenyl, benzyl, xylyl, tolyl, and naphthyl groups, whereby a portion of the 1,4-dichlorobutene-2 is isomerized to form 3,4-dichlorobutene-1, or 2) a ferric carboxylate catalyst of the formulawhere R, R′ and R″ are independently alkyl or alkenyl groups of 4-18 carbon atoms, cycloalkyl or cycloalkenyl groups of 6-18 carbon atoms or aryl groups selected from phenyl, benzyl, xylyl, tolyl, and naphthyl groups, the sum of m, n and o is 3 and m, n and o are independently 0, 1 or 2, whereby a portion of the 1,4-dichlorobutene-2 is isomerized to form 3,4-dichlorobutene-1.

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G. Henrici-Olive and S. Olive, Kinetics and Mechanism of the Iron Catalyzed Positional Isomerization of Dichlorobutenes, J. Organometal. Chem. 1971, 301-311, 29, Elsevier Sequoia, S.A., Lausanna, The Netherlands.
C.A. Stewart, Jr., et al., Chloroprene Polymers, Encyclopedia of Polymer Science and Engineering, 1985, 441-462, vol. 3, John Wiley & Sons, Inc.

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