Lignosulfonates, i.e. technical lignins derived from the
sulphite process, suffer from high heterogeneity. With the
aim of obtaining materials with more homogeneous and
defined characteristics, this contribution focuses on
lignosulfonate fractionation, specifically by applying
sequential solvent extraction (SSE) to softwood and
hardwood lignosulfonate samples. The obtained fractions
are fully characterized from the physicochemical point of
view
