Process for purification of phosphonitrilic chloride polymers

Details Process for purification of phosphonitrilic chloride polymers Process for purification of phosphonitrilic chloride polymers

1974-11-06

1976-08-10

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Halogen containing

C01B 2510

Patent

active

039742610

ABSTRACT:
A method for the selective purification of phosphonitrilic chloride polymer mixtures to obtain substantially pure cyclic trimeric and tetrameric phosphonitrilic chloride polymers by distillaton under reduced pressure with inert solvent passed through the molten phosphonitrilic chloride mixture, optionally with prior solvent extraction and/or subsequent recrystallization from solvent.

REFERENCES:
patent: 3372005 (1968-03-01), Jaszka et al.
patent: 3378353 (1968-04-01), Hands
patent: 3379510 (1968-04-01), Jaszka
patent: 3677720 (1972-07-01), Maund et al.
patent: 3694171 (1972-09-01), Dreifas

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