Method for improving capacity when filtering green liquor

Details Method for improving capacity when filtering green liquor Method for improving capacity when filtering green liquor

D - Textiles, Paper

21

C

D21C 11/00 (2006.01)

Patent

CA 2188941

The invention relates to a method for improving the filterability of the green liquor in the kraft pulp process by means of adding aluminium in the form of elemental aluminium or an aluminium-containing chemical compound to the process in a quantity such that the major part of the magnesium content of the green liquor is precipitated out together with aluminium in the form of hydrotalcite.

L'invention concerne un procédé d'amélioration de la capacité de filtrage de la liqueur verte dans la fabrication de la pâte à papier au moyen d'apport d'aluminium, sous forme d'aluminium élémentaire ou d'un composé chimique contenant de l'aluminium, selon une quantité provoquant la précipitation de la majeure partie de la teneur en magnésium de la liqueur verte avec l'aluminium sous forme d'hydrotalcite.

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