Method and apparatus for manufacturing of a calcium...

Details Method and apparatus for manufacturing of a calcium... Method and apparatus for manufacturing of a calcium...

C - Chemistry, Metallurgy

01

F

C01F 11/18 (2006.01) D21H 19/38 (2006.01)

Patent

CA 2572776

A method and apparatus for producing a calcium carbonate product formed of small < 100 nm sized separate calcium carbonate particles. Calcium hydroxide is fed through a disintegration and spraying apparatus (14), operating on the principle of a pin mill, into a gas which contains carbon dioxide for precipitating calcium carbonate particles and which is inside a precipitation reactor (10). The temperature in the precipitation reactor is maintained at < 65~C.

L'invention concerne un procédé et un appareil permettant de produire un produit de carbonate de calcium constitué de petites particules de carbonate de calcium distinctes de dimensions inférieures à 100 nm. L'hydroxyde de calcium est alimenté dans un appareil de désintégration et de pulvérisation (14), fonctionnant selon le principe d'un broyeur à pointes, dans un gaz renfermant du dioxyde de carbone permettant de précipiter les particules de carbonate de calcium et se trouvant dans un réacteur de précipitation (10). La température dans le réacteur de précipitation est maintenue à moins de 65°.

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