The role of lignin products (Sodium lignosulfonate)

Sodium lignosulfonate to pulp mill as raw material, to the waste solution by adding concentrated sulfuric acid 50%, stirring 4-6 hours, and then with lime milk, by sedimentation, filtration, beating, acid, sodium carbonate Conversion, concentration, drying products. Is a natural polymer, with a strong dispersion, due to the different molecular weight and functional groups have different degrees of dispersion, is a surface active material, can be adsorbed on the surface of a variety of solid particles can be carried out Metal ion exchange, but also because of its organizational structure of the existence of a variety of active groups, which can produce condensation or hydrogenation with other compounds.