VERFAHREN ZUR HERSTELLUNG VON GROBKOERNIGEM DICALCIUMPHOSPHAT-DIHYDRAT

VERFAHREN ZUR HERSTELLUNG VON GROBKOERNIGEM DICALCIUMPHOSPHAT-DIHYDRAT

A process for the preparation of coarse-particle dicalcium phosphate dihydrate having a virtually spherical crystal shape and a particle size range between about 63 and 450 mu m, preferably between about 90 and 300 mu m, by reacting pure aqueous phosphoric acid with aqueous suspensions of precipitat...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BRACHTEL, GEROLD, RAAB, GUENTER, SCHOBER, DETLEV
Format: Patent
Sprache:ger
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Beschreibung
Zusammenfassung:A process for the preparation of coarse-particle dicalcium phosphate dihydrate having a virtually spherical crystal shape and a particle size range between about 63 and 450 mu m, preferably between about 90 and 300 mu m, by reacting pure aqueous phosphoric acid with aqueous suspensions of precipitated chalks, wherein an amount of suspension corresponding to the reaction product formed is removed continuously or semicontinuously and the dicalcium phosphate dihydrate is separated off, washed and dried. Also disclosed is coarse-particle dicalcium phosphate dihydrate produced by the above process.