Process for removing anthraquinone type scale

Details Process for removing anthraquinone type scale Process for removing anthraquinone type scale

B - Operations, Transporting

08

B

149/12

B08B 3/08 (2006.01) C23G 1/14 (2006.01) D21C 11/10 (2006.01)

Patent

CA 1182723

ABSTRACT OF THE DISCLOSURE: A process for removing an anthraquinone type scale comprises condensing steam evaporated from a black liquor obtained by separating pulp from a digested mixture of lignocelluloses containing an anthraqui- none type digesting assistant; and contacting a heated aqueous solution of a base in the presence or absence of a reducing agent or an alkali resistant surfactant with a wall of a condenser of an evaporator on which said anthraquinone type scale is adhered.

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