| 摘要 |
PROBLEM TO BE SOLVED: To provide the process for producing ammonium hexafluoroaluminate [(NH4)3AlF6] having high bulk density and high average particle size. SOLUTION: When ammonia is reacted with a slurry of ammonium tetrafluoroaluminate containing 5-50 wt.% ammonium hexafluoroaluminate in a hydrofluoric acid solution, seed crystals of ammonium hexafluoroaluminate are added to the ammonium tetrafluoroaluminate containing ammonium hexafluoroaluminate, by 5 to 30 wt.%.
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