Four water reducing agents, mainly composed of lignin sulphonate, were obtained from four types of pulping waste liquor derived by different materials of different pulp-making methods.

• 摘要针对不同原料、不同制浆蒸煮方法产生的四种废液，通过简短的工艺回收、改性制得以木质素磺酸盐为主要成分的复合型减水剂。