The mannered null pulp liquid which separates the sulfide from the liquid for pulping making use of

摘要

(57) Abstract The ion suppression separable device (9) it is included, as snake cage electrolytic resin the white liquid of kraft pulp conversion (8) the component which is rich in the sulfide (12) with the component which is rich in caustic alkali (10) with it separates by the manner which uses the ion-exchange resin which is informed. The component which is rich in the sulfide (12), pulping (1) it can also use with early phase and preliminary treatment of the lumber tip/chip which precedes pulping and, although or the liquid which is rich in the polysulfide is prepared, it can also use. The component which is rich in caustic alkali (10), it can also use at last delignification conversion phase and, it can also use in sodium hydroxide or place of the white liquid in the scrubbing of oxygen delignification conversion, pH adjustment and the flue gas. The same system as description above, the green liquor (6) and the polysulfide liquid (8a) separates from into the component which is rich in the sulfide and the component which is lacking in the sulfide, although the sulfide is removed from the flow of the other factory caustic alkali which in addition was contaminated with the sulfide can use.