PROCESS FOR THE MANUFACTURE OF COARSE-GRAINED DICALCIUM PHOSPHATE DIHYDRATE

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...

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Bibliographic Details
Main Authors BRACHTEL, GEROLD, RAAB, GUNTER, SCHOBER, DETLEV
Format Patent
LanguageEnglish
German
Published 07.10.1987
Edition4
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary: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.
Bibliography:Application Number: EP19860101934