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A crude wet- process phosphoric acid produced by the attack on a non- calcined phosphate- bearing rock in purified by first being pre-decolorised by means of an adsorbing substance, and then extracted by means of an organic solvent that is weakly miscible with water, the organic solution is re-extracted with water and then the re-extraction phosphoric acid solution is heated, concentrated and treated by means of an oxidizing agent, thereby producing a purified and colorless concentrated acid, the thus-purified acid can be used in human foodstuffs
JO19801109A1980-12-011980-12-01Purification of phosphoric acid
JO1109B1
(en)
Removing iron from an organic extractant containing uranium and iron especially from the extractant used in the recovery of uranium from wet process phosphoric acid