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Process for removing impurities of aluminium, magnesium and iron phosphoric acid obtained by umida
Process for removing impurities of aluminium, magnesium and iron phosphoric acid obtained by umida
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机译:umida获得的去除铝,镁和铁的磷酸杂质的方法
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摘要
A method of removing aluminum, magnesium, iron and other impurities from wet process phosphoric acid is provided. The method comprises partially ammoniating the acid and reacting the acid with a fluoride ion donating compound to precipitate aluminum- and magnesium-containing ralstonite and ammonium fluorosilicate which can be easily separated from the acid thereby producing a partially ammoniated wet process phosphoric acid of reduced impurities content.
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