Phosphoanhydrite process

Details Phosphoanhydrite process Phosphoanhydrite process

C - Chemistry, Metallurgy

01

F

23/103, 23/76

C01F 11/46 (2006.01)

Patent

CA 1186867

ABSTRACT A wet process for producing phosphoric acid and phospho- anhydrite by acidulation of phosphate rock with a phosphoric acid/sulfuric acid mixture containing a very high recycle content of small sized anhydrite seed crystals. A strong phosphoric acid is obtained having a concentration of at least about 35% P2O5. Further, the phosphoanhydrite may be readily converted to an industrially usable gypsum product.

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