Production of potassium hexafluotitanates using dilute hydrofluoric acid

摘要

A process is provided for recovering fluorine from dilute hydrofluoric acid solutions, such as waste scrubber solution obtained in the treatment of phosphates. The dilute solution is used to react with oxidic titanium material to solubilize the contained titanium and subsequently form, in the presence of potassium ions, crystals of K2TiF6 which are commercially useful as a grain-refining agent in the manufacture of aluminum alloys.