Process for preparing zirconium phosphate

Details Process for preparing zirconium phosphate Process for preparing zirconium phosphate

1981-12-02

1983-04-26

McCarthy, Helen M.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423305, C01B 1516, C01B 2526

Patent

active

043812899

ABSTRACT:
Crystalline alpha zirconium phosphate Zr(HPO4).sub.2.H.sub.2 O, which can selectively remove ammonia and heavy metal ions from solution by ion exchange, is made by forming a room-temperature solution of zirconyl chloride ZrOCl.sub.2 in hydrochloric acid and adding sodium fluoride; the pH is now at most 1.6, the zirconium concentration is about 0.1M and the molar ratio sodium:zirconium is 5:1. Then, with rapid mixing, this composition is added to 15M phosphoric acid H.sub.3 PO.sub.4 (molar ratio phosphate:zirconium at least 3:1). Zirconium phosphate is precipitated.

REFERENCES:
patent: 3056647 (1962-10-01), Amphlett
patent: 4025608 (1977-05-01), Tavill et al.

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