Ocp Sa

Kamal Samrane

Abdelaali Kossir

Mehdi Khouloud

Kossir Abdelaali

A process for preparing synthetic calcium fluoride (CaF) (min 90% CaFby weight) from fluosilicic acid is provided. The processes comprises the steps of (a) reacting fluosilicic acid (HSiF) with ammonium hydroxide or ammonia in a first reactor so as to obtain a first slurry and filtering the first slurry so as to obtain a filtrate containing a solution of ammonium fluoride (b) precipitating the solution of ammonium fluoride with calcium in a second reactor so as to produce a second slurry containing calcium fluoride and (c) evolving the major part of ammonia from the second reactor and then scrubbing and returning said ammonia to the first reactor.

Process for preparing calcium fluoride from fluosilicic acid

The invention relates to a method for manufacturing an ammonium phosphate fertilizer from a phosphoric acid aqueous solution that has less than 50% POconcentration and is obtained by wet phosphate ore treatment, said phosphoric acid containing traces of cadmium, comprising the following steps:

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Casablanca, Morocco

Kamal Samrane