From Waste Biomass To Solid Support: Lignosulfonate As A Cost-effective And Renewable Supporting Material For Catalysis

With the increasingly serious pollution of environment and increasing consumption ofresourse, innovation of green technology in chemistry and chemical industries has becomemore and more urgent. Biomass is a inexhaustible resource that can be renewable with lowpollution, breadth of distribution, large mount, and other characteristics. Therefore, thesubject of biomass has attracted continuedly strong concern.Lignosulfonate (LS) is an organic waste generated as a by-product of cooking processin sulfite pulping in the manufacture of paper. In this thesis, LS was used as an anionicsupporting material for immobilizing cationic species, which can then be used asheterogeneous catalyst in some organic transformations. With this strategy, threelignin-supported catalysts were prepared including (i) lignin-SO3Sc(OTf)2,(ii)lignin-SO3Cu(OTf) and lignin-IL@NH2(IL=ionic liquid). These solid materials were thenexamined in many organic transformations. It was finally found that, compared with itshomogeneous counterpart as well as some other solid catalysts that are prepared by usingdifferent supports with the same metal or catalytically active species, the lignin-supportedcatalysts showed in these reactions better performance not only in terms of activity but alsowith regard to recyclability.