Oil and modified products lignosulfonate

Lignin is the only way to provide renewable natural aromatic compounds of non-petroleum resources. It mainly comes from the black oil expeller. To alkaline papermaking get is alkaline lignin, sulfite method to get the paper is lignin sulfonate. Lignin molecular structure is very complex, but constitute lignin points
The basic unit is a sub-phenylpropyl group. In addition, lignin molecules containing aromatic rings? Phenolic hydroxyl? Carboxyl? Carbonyl group such as a functional group reactive ability, can be further modified in order to widen the application fields. Lignosulfonate strong hydrophilicity, but the lack of long-chain lipophilic and machine for pellets alone, but a rich source of inexpensive, become the focus of research carried out modification. Modification of lignin mainly focused on increasing lipophilic group, including alkylation of alkali lignin, sodium and potassium permanganate and then oxidized high, and the use of etherified or substitution reaction on wood lignosulfonates been introduced into the molecular hydrocarbon modified products.