PROCEDURE AND DEVICE FOR THE ELIMINATION OF IMPURITIES, WHICH CONSISTS OF FLUORINE AND ORGANIC COMPOUNDS, FROM PHOSPHORIC ACID OF PROCEDURE IN WET

摘要

The disclosure provides for phosphoric acid to be freed in a single process stage from fluorine and organic contaminants. To this end, the disclosure provides for the acid to be introduced into the upper portion of a closed structural element, for it to be treated therein at elevated temperature and pressure with steam flowing countercurrently to the acid, and for the acid so treated to be reacted in the lower portion of the structural element with hydrogen peroxide. The disclosure also provides an apparatus for carrying out the process.