Process for the preparation of an additive-containing...

Details Process for the preparation of an additive-containing... Process for the preparation of an additive-containing...

B - Operations, Transporting

01

J

B01J 21/16 (2006.01)

Patent

CA 2564729

Process for the preparation of an additive-containing anionic clay comprising the steps of (a) milling a physical mixture of a divalent metal compound and a trivalent metal compound, (b) calcining the physical mixture at a temperature in the range 200-800~C, and (c) hydrating the calcined mixture in aqueous suspension, wherein an additive is present in the physical mixture and/or the aqueous suspension of step (c). With this process additive-containing anionic clays with a homogeneous additive distribution can be prepared.

L'invention concerne un procédé destiné à la préparation d'une argile anionique contenant un additif, consistant (a) à moudre un mélange physique renfermant un composé métallique divalent et un composé métallique trivalent, (b) à calciner le mélange physique à une température comprise entre 200 et 800 ·C, et (c)à hydrater le mélange calciné dans une suspension aqueuse, le mélange physique et/ou la suspension aqueuse de l'étape (c) contenant un additif. Ce procédé permet d'obtenir des argiles anioniques contenant un additif avec une répartition homogène.

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