Use of metal chelate complexes in dehalogenation

Details Use of metal chelate complexes in dehalogenation Use of metal chelate complexes in dehalogenation

1993-04-19

1994-09-06

Evans, Joseph E.

Hazardous or toxic waste destruction or containment

Containment

Solidification, vitrification, or cementation

540139, 540145, 570205, 570230, 585733, 588206, 422129, C07C 1724, C07C 904, A62D 300

Patent

active

053450329

ABSTRACT:
A method for dehalogenation of organohalogen compounds, e.g. environmental pollutants in industrial waste. The organohalogen is reacted with a reducing agent in the presence of a selected metal-centered corrin, porphyrin or phthalocyanine complex. Preferred complexes are hydrolysis products of cyanocobalamin, of formula (I), in which R.sup.1 is NH.sub.2 or OH, R.sup.2 is H, CH.sub.2 CH.sub.2 COOH or CH.sub.2 CH.sub.2 CONH.sub.2, R.sup.3 is H, CH.sub.2 CH.sub.2 COOH or CH.sub.2 CH.sub.2 CONH.sub.2, and R.sup.4 is NHCH.sub.2 CH(OH)CH.sub.3, OH or NH.sub.2. The complex is preferably immobilized on a substrate. Some novel metal-centered porphyrin complexes are also described. A dehalogenation apparatus using the method of the invention is also described. ##STR1##

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