A procedure for the recovery of purified phosphoric acid and possibly more concentrated. (Machine-translation by Google Translate, not legally binding)

摘要

A process for the recovery of purified phosphoric acid, and possibly more concentrated, from a phosphoric acid of technical purity, in which sulfuric acid is incorporated in the aqueous crude acid, in a proportion of from 0.1 to 5% in weight; the acid thus acidified is subjected to extraction with a solvent of the specified kind; the resulting extract is separated from the residual acid and is subjected to a treatment by means of which a higher organic phase and a lower aqueous phase are separated into layers, and the latter is recovered as a product. (Machine-translation by Google Translate, not legally binding)