Phosphoanhydrite process

Details Phosphoanhydrite process Phosphoanhydrite process

1981-12-14

1984-06-05

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423 2, 423320, 423555, C01F 100, C01F 500, C01F 1100, C01B 2516

Patent

active

044527705

ABSTRACT:
A wet process for producing phosphoric acid and phosphoanhydrite 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% P.sub.2 O.sub.5. Further, the phosphoanhydrite may be readily converted to an industrially usable gypsum product.

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Robert Conley, The Hydration Reaction on Anhydrite, 1958.
Sekko to Sekkai No. 8, 3-10, 1953, Studies on the Hydration of Natural Anhydrite.

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