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.

• 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。