Process for the preparation of a crystallized 4a zeolite

B - Operations – Transporting – 01 – J

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B01J 29/04 (2006.01) C11D 3/12 (2006.01)

Patent

CA 2055228

L'invention concerne un procédé de préparation en continu de zéolithe 4A cristallisée par mélange direct dans un réacteur non agité de solutions aqueuses de silicate et d'aluminate de sodium, mise en présence de l'hydrogel formé avec un pied de cuve d'aluminate de sodium, cristallisation, lavage, filtration et éventuellement séchage. La zéolithe 4A ainsi préparée a une forte capacité d'échange des ions calcium. L'invention concerne également l'utilisation de la zéolithe 4A obtenue par le procédé ci-dessus mentionné, comme adjuvant de compositions détergentes.

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