Process for rapid conversion of fluoroanhydrite to gypsum

Details Process for rapid conversion of fluoroanhydrite to gypsum Process for rapid conversion of fluoroanhydrite to gypsum

C - Chemistry, Metallurgy

04

B

23/103

C04B 11/02 (2006.01)

Patent

CA 1185070

Process for Rapid Conversion of Fluoroanhydrite to Gypsum Abstract of the Disclosure A process for making an industrially usable gypsum from fluoroanhydrite in which fluoroanhydrite is contacted with a fluid reaction medium slurry containing soluble sulfate ions and a substantial proportion of small gypsum seed crystals to rapidly hydrate a large proportion of the fluoroanhydrite to a coarser, substantially pure gypsum. The slurry is clarified to separate coarse purified gypsum reaction product, and the reaction medium is reconstituted and recycled containing gyp- sum crystals less than the desired reaction product size and constituting about 50-90% of the total solids of the recon- stituted fluid reaction medium.

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