Production process of fluorinated benzonitrile

Details Production process of fluorinated benzonitrile Production process of fluorinated benzonitrile

2003-07-23

2009-08-04

Wilson, James O. (Department: 1624)

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

Organic compounds

Nitriles

Reexamination Certificate

active

07569718

ABSTRACT:
The invention enables reduction of catalyst in producing tetrafluorobenzonitrile by decyanation of one cyano group of tetrafluorodicyanobenzene by using a synthetic zeolite, particularly Zeolite 3A, 4A or 5A, in the reaction. Therefore, the invention provides an industrially useful process capable of producing tetrafluorobenzonitrile, a useful agrochemical and drug intermediate, by hydrogenolysis of tetrafluorodicyanobenzene to decyanate one cyano group with the use of catalyst in small amounts.

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patent: 6020517 (2000-02-01), Morinaka et al.
patent: 37 05 224 (1988-09-01), None
patent: 0164619 (1985-12-01), None
patent: WO 98/08795 (1998-03-01), None

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