Purification of pentachloronitrobenzene by distillation

Details Purification of pentachloronitrobenzene by distillation Purification of pentachloronitrobenzene by distillation

1987-10-08

1989-06-27

Bascomb, Wilbur

Distillation: processes, separatory

Convective distillation with normally gaseous medium, e.g., air

203 91, 203DIG2, 203DIG11, 568938, B01D 334, C07C 7910

Patent

active

048426962

ABSTRACT:
Pentachloronitrobenzene (PCNB) which initially contains in excess of 0.5% hexachlorobenzene (HCB) is purified by distilling the impure PCNB at a temperature between 100.degree.-250.degree. C. and a pressure below or at atmospheric pressure to obtain a PCNB product having a HCB content lower than 0.5%, and preferably lower than 0.1%.

REFERENCES:
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patent: 4090922 (1978-05-01), Bauer et al.
patent: 4147732 (1979-04-01), Mendiratta
patent: 4289589 (1981-09-01), Koehler et al.

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