Removal of potassium values from pulp mill liquors

Details Removal of potassium values from pulp mill liquors Removal of potassium values from pulp mill liquors

D - Textiles, Paper

21

C

9/2, 9/36.3

D21C 11/00 (2006.01) C01D 3/06 (2006.01) D21C 3/02 (2006.01)

Patent

CA 1113207

ABSTRACT OF THE DISCLOSURE The accumulation of potassium values in a closed cycle pulp mill process usually using sodium hydroxide as a pulping chemical is prevented by removal of potassium values as potassium chloride by crystallization. A variety of pro- cedures are described, including coprecipitation from white liquor with sodium chloride followed by separation of the codeposited salts, precipitation from white liquor separate from sodium chloride precipitation, and intermittent precipi- tation from green liquor with intermittent precipitation of sodium chloride from white liquor.

324472

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