Production of pharmaceutical barium sulphate

Details Production of pharmaceutical barium sulphate Production of pharmaceutical barium sulphate

C - Chemistry, Metallurgy

01

F

23/101

C01F 11/46 (2006.01) C01F 1/00 (2006.01)

Patent

CA 1050235

PRODUCTION OF PHARMACEUTICAL BARIUM SULPHATE Abstract of the Disclosure A new simplified process is described for producing pharmaceutical barium sulphate in which the barium sulphate does not require dissolution for purification. The new process comprises grinding a naturally occurring barite ore containing individual crystals of substantially pure barium sulphate together with gangue minerals to form a finely divided particulate ore material, passing this finely divided ore through a high intensity wet magnetic separator to remove magnetic particles, leaving a non-magnetic fraction containing barium sulphate and low specific gravity minerals, subjecting the non-magnetic fraction to gravity separation to separate a substantially pure barium sulphate fraction, leaching the barium sulphate fraction with sulphuric acid to remove acid soluble impurities and washing the leached product.

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