Pulp mill process with sodium chloride removal

Details Pulp mill process with sodium chloride removal Pulp mill process with sodium chloride removal

D - Textiles, Paper

21

C

9/19

D21C 3/02 (2006.01) D21C 11/00 (2006.01)

Patent

CA 1072262

ABSTRACT OF THE DISCLOSURE Sodium chloride is removed from a pulp mill process by having a recovery and regeneration operation by deposition from regenerated white liquor. In the preferred embodiment, a solid mixture of sodium carbonate, sodium sulphate and sodium chloride first is removed from the white liquor by evaporation thereof and is recycled partly to the furnacing step of the recovery and regeneration operation and partly to smelt solution formed in the recovery and regeneration operation, and sodium chloride for removal is deposited by manipulation of the partially concentrated white liquor.

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