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.

• 用元素分析、1H-NMR和13C-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。