Effects of chloride, potassium, and sulfate on the causticizing reaction in the kraft recovery process

• Main Authors: Saeidi, Sona, Tran, Honghi, Papangelakis, Vladimiros G.
• Format: Article in Journal/Newspaper
• Language: English
• Published: TAPPI Press 2009
• Subjects: Canada; Pacific; Wilcox; Peace River
• Online Access: http://hdl.handle.net/1807/98528

We studied the effects of chloride (Cl), potassium ( k), and sulfate (S o 4 ) on the equilibrium of the causticizing reaction over a wide range of causticizing conditions, using oli , an advanced thermodynamic program for equilibrium calculations in aqueous solutions of ionic salts. Cl, k, and S o 4 were shown to have little or no effect on the causticizing equilibrium. Under a given causticizing condition, coastal mills, due to their much higher naCl concentration, are predicted to have a causticizing efficiency 1%–2% lower than that of inland mills. This work was part of the research program on Increasing Energy and Chemical Recovery Efficiency in the Kraft Pro - cess. The program is jointly supported by the Natural Scienc - es and Engineering Research Council of Canada (NSERC) and a consortium of the following companies: Abitibi-Bowater, Alstom Power, Andritz, Aracruz Celulose, Babcock & Wilcox, Boise, Celulose Nipo-Brasileira, Carter Holt Harvey, Clyde- Bergemann, Diamond Power International, Domtar, DMI Peace River Pulp, Georgia Pacific, International Paper, Irving Pulp & Paper, Metso Power, MeadWestvaco, Stora Enso Re - search, Tembec, and Votorantim Celulose e Papel.