Preparation of functionalized Kraft lignin beads

Kraft lignin from black liquor wastes have been converted into epichlorohydrin-crosslinked beads by inverse suspension polymerization. A careful control of the different parameters allowed the preparation of spherical beads with a relatively narrow diameter size distribution. The obtained beads, without permanent porosity, swell well in hydroalcoholic media. Grafting of the sulfonylhydrazine moiety using a two-step route was further performed to apply them to carbonyl compounds scavenging.