Process for the reductive dehalogenation of polyhaloaromatics wi

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

1990-06-14

1993-02-09

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

From nonhydrocarbon feed

2082621, 2082625, 423155, 423179, C07C 120, C10G 1700

Patent

active

051854880

ABSTRACT:
A process for the reductive dehalogenation of halogenated aromatics. The process comprises reacting halogenated aromatics with sodium or calcium in the presence of a lower alcohol selected from the group comprising methanol, ethanol or isopropanol and mixtures thereof in order to convert the halogenated aromatics to hydrogenated aromatics. The halogenated aromatics are preferably reacted with sodium in the presence of methanol under reaction conditions whereby said sodium is in molten form. The preferred starting sodium/methanol/halogen molar ratio ranges from 30-40/15-20/1. The process is particularly useful for dechlorinating polychlorinated biphenyl found in electrical transformer oil.

REFERENCES:
patent: 4351978 (1982-09-01), Hatano et al.
patent: 4447667 (1984-05-01), Parker et al.
patent: 4776947 (1988-10-01), Streck et al.
patent: 4839042 (1989-06-01), Tumiatti et al.

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