Purification of crude chlorophosphazene compounds by treatment w

Details Purification of crude chlorophosphazene compounds by treatment w Purification of crude chlorophosphazene compounds by treatment w

1978-04-20

1979-11-20

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Halogen containing

C01B 2510

Patent

active

041751132

ABSTRACT:
A process for the purification of crude chlorophosphazene involves the use of an intermediate purification stage in which the crude chlorophosphazene is subjected to at least two water-washings, following which a final purification step is conducted utilizing a conventional chlorophosphazene purification procedure, such as recrystallization, sublimation, distillation, or melt-filtering and at least a very high purity cyclic chlorophosphazene trimer is then recovered. In a preferred process, the crude chlorophosphazene is subjected to three water-washings prior to the final purification step.

REFERENCES:
patent: 3694171 (1972-09-01), Dreifus
patent: 3952086 (1976-04-01), Fieldhouse

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