<正>用元素分析、1 H -NMR和1 3C -NMR波谱比较了硫化钠预处理硫酸盐制浆和常规硫酸盐制浆溶出木质素的化学结构。结果表明 ,预处理制浆溶出木质素的硫元素与甲氧基含量及脱木质素反应均不同于常规硫酸盐制浆。硫化钠预处理木质素降解反应有其特殊的规律

Chemical structure characteristics of dissolved lignins from sodium sulfide pretreatment and control kraft pulping were studied by the elemental analysis, 1H-NMR and 13 C-NMR spectra. The results indicate that the contents of sulfur and methoxyl group and the delignification process of sodium sulfide pretreatment kraft pulping are different from those of control pulping. The lignin removal reaction of sodium sulfide pretreatment kraft pulping has its own special rule.