Purification of crude chlorophosphazene compounds by treatment with water

Abstract From the Canadian patent

Abstract of the Disclosure 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.