Process for preparing halophosphazene mixtures

Details Process for preparing halophosphazene mixtures Process for preparing halophosphazene mixtures

1975-12-08

1977-12-27

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Halogen containing

423302, C01B 2510

Patent

active

040655466

ABSTRACT:
Process for the preparation of chlorophosphazene mixtures having a high proportion of cyclic trimer and tetramer by preparing a dispersion of finely divided ammonium chloride in an amount sufficient to initiate the formation of chlorophosphazene, then, after heating the dispersion to reflux, co-feeding ammonia and a solution of phosphorus pentachloride in a suitable solvent at a rate such that no free PCl.sub.5 concentration is allowed to exist in the reaction mass, and then recovering the cyclic chlorophosphazene produced.

REFERENCES:
patent: 3347643 (1967-10-01), Nielsen
patent: 3667992 (1972-06-01), Proctor
patent: 3780162 (1973-12-01), Bergeron et al.

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