a process for preparing phosphates and phosphate-containing compounds, in particular alkaline earth phosphates, silica alkaline earth phosphates or alkaline earth oxides

摘要

a process for preparing phosphates and phosphate-containing compounds, in particular alkaline earth phosphates, silica alkaline earth phosphates or alkaline earth oxides. The present invention relates to a process for preparing phosphates and / or phosphate-containing compounds, in particular alkaline earth phosphates and silica alkaline earth phosphates and alkaline earth oxides, comprising the steps: (a) heating bones and / or pimples or a composition with these constituents in a pyrolysis under oxygen exclusion and under reducing conditions at temperatures from 500 to 1100 198 c, producing, inter alia, energy-rich gases, vapors and carbon, (b) after carbon combustion originated in step (a) under oxidizing conditions in an oxidation step, in which an inorganic residues of alkaline earth carbonates and alkaline earth oxides as well as alkaline earth phosphates are produced.