Commercial Lignosulfonate Research Articles

The reactions of lignosulfonic acid with chlorosulfamic acid

A commercial lignosulfonate preparation consumed a small amount of chlorosulfamic acid. The reaction was probably due to the presence of sulfite in the preparation and to some reactive lignin groups. About one tenth of these reactive groups seem to be stilbene groups. The structures of the other groups are unknown. Simple phenols did not react or reacted only slowly with chlorosulfamic acid.

Utilization and polymerization of lignosulfonates by wood-rotting fungi

The susceptibility of lignosulfonates to the action of lignin-degrading wood-rotting fungi was studied by submitting commercial lignosulfonate (Peritan Na) and fractions of calcium lignosulfonate of different molecular weights to the action of selected white rot fungi.