Process for the purification of phosphorus oxychloride

Details Process for the purification of phosphorus oxychloride Process for the purification of phosphorus oxychloride

1998-09-02

1999-11-30

Manoharan, Virginia

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

203 59, 203 84, 203DIG11, 423300, B01D 334, C01B 2510

Patent

active

059936096

ABSTRACT:
A process for the purification of recovered or regenerated phosphorus oxychloride contaminated by reactive organic compounds, by reacting the contaminated phosphorus oxychloride with from 0.1 to 5% by weight of an organic amine, having 1 or 2 tertiary N-atoms and a boiling point above the boiling point of phosphorus oxychloride, at the boiling temperature of the reaction mixture and subsequently carrying out fractional distillation at atmospheric pressure to obtain purified phosphorus oxychloride.

REFERENCES:
patent: 3963585 (1976-06-01), Winter et al.
patent: 3983011 (1976-09-01), Wiggill
patent: 4865696 (1989-09-01), McLaughlin et al.
patent: 4929729 (1990-05-01), Haga et al.
patent: 5464600 (1995-11-01), Newallis et al.

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