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Description of the kraft process
CHEMICAL REACTIONS OF WOOD
29 other sections not shown
acid amount batch digester black liquor bleach plant bleaching chemicals calciner calcium capacity carbohydrate carbonate causticizing cellulose chemical pulp chip chlorine dioxide combustion concentration condensate consistency cyclone decrease delignification diffusion dilution discharge dissolved dregs effective alkali efficiency evaporator extraction feed fiber filter filtrate fuel furnace green liquor hardwood heat transfer hemicellulose higher hydrocyclones hypochlorite increase inlet kappa number kiln kraft process kraft pulping lignin lime mud lower material mechanical pulp mill multiple-effect evaporator Na2S NaOH operation oxidation oxygen paper particles pressure production pump pyrolysis ratio reaction recovery boiler reject rate removal residual scaling screen plate sheet shives shown in Fig slaking soap sodium hydroxide sodium sulfide softwood solids content solubility specific stage steam sulfate sulfide sulfur surface Table tall oil TAPPI temperature tion tube typical valve variables velocity viscosity washer washing white liquor wood xylan yield