Stable aqueous suspension of precipitation silica

C - Chemistry – Metallurgy – 01 – B

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6/226, 9/58, 9/6

C01B 33/141 (2006.01) D21H 19/40 (2006.01) D21H 19/58 (2006.01)

Patent

CA 1334602

L'invention concerne une suspension aqueuse de silice dont la formulation est telle qu'elle soit stable, non gélifiante, pompable et dispersible après plusieurs jours de stockage. Cette suspension est caractérisée en ce qu'elle comprend une silice de précipitation constituée par un gâteau de filtration issu de la réaction de précipitation et délité; de l'aluminium ou un composé de l'aluminium; et un dispersant anionique. Cette suspension est notamment utilisable dans l'industrie papetière pour le couchage du papier.

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