Process for the reductive dehalogenation of polyhaloaromatics

Details Process for the reductive dehalogenation of polyhaloaromatics Process for the reductive dehalogenation of polyhaloaromatics

1989-09-28

1990-08-21

Pal, Asok

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

From nonhydrocarbon feed

2082625, 210909, C07C 120

Patent

active

049508334

ABSTRACT:
The present invention relates to a process for the reductive dehalogenation of polyhaloaromatic compounds. It comprises reacting polyhaloaromatics in a hydrocarbon or silicone-based oil or an organic diluent, with an alkali metal in the presence of an ammonium salt to reduce the polyhaloaromatics to hydrogenated aromatics and to convert the halogen content to metal halides. Preferably, the polyhaloaromatics and the ammonium salt are to be reacted with the alkali metal in the form of a suspension. Other preferred features include the use of an amount of alkali metal ranging from 5 to 10 moles and the use of an amount of ammonium salt also ranging from 5 to 10 moles for each mole of the polyhaloaromatic compound to be reduced, carrying out the reaction under an inert atmosphere and carrying out the reaction at a temperature ranging from 40.degree. to 60.degree. C.

REFERENCES:
patent: 4340471 (1982-07-01), Jordan
patent: 4377471 (1983-03-01), Brown et al.
patent: 4379746 (1983-04-01), Norman et al.
patent: 4416767 (1983-11-01), Jordan

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