[ThomasHs]

Is it possible to obtain elementary phosphorus, from H3PO4. If so, how?

[billnotgatez]

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Then tell us what you have learned so far about phosphorus

[Radu]

 I don't think you could obtain it in the lab.....I mean, electrolysis is out of question, and even the strong reductants, like MgH2 or H2 cannot be used in a solvent. An industrial method could be treating the solutiuon of phosphoric acid with calcium hydroxide, and then evaporating and heating the residuum with graphite, at 850°C..