Purification of crude chlorophosphazene compounds by...

Details Purification of crude chlorophosphazene compounds by... Purification of crude chlorophosphazene compounds by...

C - Chemistry, Metallurgy

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B

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C01B 25/10 (2006.01) C01B 21/098 (2006.01)

Patent

CA 1105673

PURIFICATION OF CRUDE CHLOROPHOSPHAZENE COMPOUNDS BY TREATMENT WITH WATER Abstract of the Disclosure A process for the purification of crude chloro- phosphazene 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 puri- fication step is conducted utilizing a conventional chloro- phosphazene 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.

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