Refinement of wet-process phosphoric acid on coal adsorbents

The ways for the development of refined phosphoric acid (RPA) production were shown with respect to changing the structure of the world production and consumption of technical and food phosphoric acid. The analysis of RPA production methods evidenced the major problem related to purification from such components as fluorine compounds and soluble complex fluorine compounds. The necessary product quality was achieved by the application of universal complex refinement methods with wet-process phosphoric acid (EPA) using coal adsorbents. A higher efficiency of the proposed RPA production method was achieved by combining the stages of fluorine compounds elimination and catalytic adsorption refinement.