Polychloropyridines from polychloropicolines contaminated with h

Details Polychloropyridines from polychloropicolines contaminated with h Polychloropyridines from polychloropicolines contaminated with h

1986-10-31

1988-02-02

Rotman, Alan L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D21172

Patent

active

047230193

ABSTRACT:
Trichloro- and tetrachloro(trichloromethyl)pyridines contaminated with hexachlorobenzene are converted to useful products containing acceptably low levels of hexachlorobenzene by chlorination under conditions of chlorinolysis to tetrachloro- and pentachloropyridine and then removing the hexachlorobenzene by distillation. For example, 2,3,6-trichloro-5-(trichloromethyl)pyridine contaminated with hexachlorobenzene is converted to 2,3,5,6-tetrachloropyridine containing less than 50 ppm hexachlorobenzene.

REFERENCES:
patent: 3420833 (1969-01-01), Taplin
patent: 4256894 (1981-03-01), Dietsche et al.
patent: 4517369 (1985-05-01), Marinak et al.

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