硫酸盐苇浆电化学漂白的研究

ELECTROCHEMICAL BLEACHING OF REED KRAFT PULP

用二氧化铅做阳极,不锈钢做阴极,铁氰化钾为催化剂,对硫酸盐苇浆进行电化学漂白,详细讨论了电流密度、温度、用碱量、漂白时间、催化剂用量以及纸浆浓度等因素对纸浆卡伯值和粘度的影响。通过综合分析得出硫酸盐苇浆电化学漂白的最佳条件是:用碱量0.4%、电流密度6.67mA/cm2、漂白时间30min、漂白温度80℃、催化剂浓度12.50mmol/L,浆浓1.3%。

Electrochemical bleaching of reed kraft pulp employing a graphite plate anode and a stainless steel screen cathode adding K3Fe(CN)6 as catalyst was carried out.Influences of current density,alkali charge,bleaching time,concentration of catalyst and pulp consistency on pulp Kappa number and viscosity were discussed.Experimental results indicate that the optimum condition for electrochemical bleaching of reed kraft was:current density 6.67 mA/cm2,alkali 0.4%,K3Fe(CN)6 12.50 mmol/L,pulp consistency 1.3% at 80 ℃ for 30 min.