Continuous process for producing anionic clay

Details Continuous process for producing anionic clay Continuous process for producing anionic clay

C - Chemistry, Metallurgy

01

F

C01F 1/00 (2006.01) C01F 5/00 (2006.01) C01F 7/02 (2006.01)

Patent

CA 2320094

This patent describes an economical and environment friendly continuous process for the synthesis of anionic clays with carbonate and/or hydroxide anions as the charge-balancing interlayer species. It involves reacting a slurry comprising aluminium trihydrate and/or its calcined form, with a magnesium source. There is no necessity to wash or filter the product. It can be spray dried directly to form microspheres or can be extruded to form shaped bodies. The product can be combined with other ingredients in the manufacture of catalysts, absorbents, pharmaceuticals, cosmetics, detergents, and other commodity products.

L'invention concerne un procédé continu, économique et sans danger pour l'environnement, qui permet de synthétiser des argiles anioniques en utilisant des anions carbonate et/ou hydroxyde comme espèces de liaison intercouches d'équilibrage des charges. Le procédé consiste à faire réagir une boue renfermant un trihydrate d'aluminium et/ou sa forme calcinée avec une source de magnésium. Il n'est pas nécessaire de laver ou de filtrer le produit. Celui-ci peut être soit directement séché par pulvérisation de façon à former des microsphères, soit extrudé de façon à former des corps façonnés. Le produit peut être associé à d'autres ingrédients dans la fabrication de catalyseurs, d'absorbants, de produits pharmaceutiques ou cosmétiques, de détergents et d'autres biens de consommation courante.

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