Continuous process for preparing phosphoric acid and calcium...

Details Continuous process for preparing phosphoric acid and calcium... Continuous process for preparing phosphoric acid and calcium...

C - Chemistry, Metallurgy

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C01B 25/223 (2006.01) C01B 25/222 (2006.01) C01B 25/225 (2006.01) C01B 25/226 (2006.01) C01B 25/228 (2006.01) C01B 25/229 (2006.01) C01B 25/231 (2006.01)

Patent

CA 1264408

ABSTRACT OF THE DISCLOSURE There is described a process which comprises adjusting on the one hand the flow rates of a circulating mixture relative to a base flow rate according to very specific specifications, and on the other hand so adjusting the reaction conditions in succeeding reaction zones as to obtain a production phosphoric acid with a P2O5 concentration between 33 and 52%, and a H2SO4 concentration between 0.25 and 2.5%, and calcium sulphate in the form of dihydrate, hemihydrate, anhydrite or a mixture of at least two said crystalline forms.

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