A lignin-base flocculant LSDC was prepared by the Mannich reaction of the calcium lignosulfonate - acryamide copolymer.

• 本文以造纸工业副产物-木质素磺酸钙为原料,通过接枝共聚和曼尼希反应合成了两性木素絮凝剂(LSDC)。