Assertion: gaseous phosphine | /r/HasProperty | collected
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Source sentences:
text: According to the present invention, we provide a process for making phosphine, which comprises reducing, in a first step, anhydrous zinc phosphate to zinc phosphide by treatment with carbon at a temperature higher than 1000° C., and, in a second step, reacting the zinc phosphide formed in the first step with phosphoric acid, the resulting gaseous phosphine being collected, and the resulting zinc phosphate being dried, dehydrated and recycled to the first step.