Producing phosphate compounds, comprises heat treating bones and/or fish bones of oxygen under redu

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The invention relates to a method for the preparation of phosphates and/or phosphate-containing compounds, in particular alkaline earth metal phosphates and [...] and-oxides, comprising the steps of : . Heating of bone and/or appliances or a composition of these components among oxygen conclusion under reducing conditions at temperatures between 500° to 1100 °C, wherein, inter alia, high energy gases/vapors arise and carbon ; . (A) post-combustion of the carbon resulting under oxidizing conditions in step, wherein an inorganic radical from alkaline earth carbonates and alkaline earth oxides and alkaline earth phosphates is created.