光叶楮白皮碱性过氧化氢草酸盐法制浆工艺条件的优化

Optimization of Alkaline Hydrogen Peroxide Oxalate Pulping Conditions for Guangyechu White Bast

讨论了影响光叶楮白皮制浆的各种因素,筛选出APO(碱性过氧化氢草酸盐)法制浆的最佳工艺条件为:H2O2用量9%,Na2C2O4用量20%,NaOH用量9%,AQ用量0.10%,EDTA用量0.20%,液比1∶9,最高温度85℃,保温时间3 h。在此条件下制浆,所得浆料得率63.5%,高锰酸钾值7.6,白度69.7%ISO。

Various factors that influence the alkaline hydrogen peroxide oxalate （APO） pulping process for guargyechu white bast are studied. The optimum process conditions are as following： the dosage of sodium oxalate （Na2C2O4） 20%, hydrogen peroxide （H2O2） 9%, sodium hydroxide （NaOH） 10%, AQ 0.10%, EDTA 0.20% ; liquor ratio 1：9, the maximum temperature 85℃, the time at the maximum temperature 3h. The pulp yield, K value and brightness are 63.5 %, 7.6 and 69.7 % （ISO） respectively under the optimum process conditions. The analysis of the pulp chemical composition testifies that the APO pulping process is suitable for the raw materials of high pectin content.