Method for obtaining low molecular weight lignin
AssigneeMetgen Oy
InventorsAnu Minna Maaret Suonpää, Matti Wilhelm Heikkilä, Joana Raquel Amaral Antunes, Klara Birikh
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Abstract
The invention relates to obtaining lignin preparations of desirable molecular size and properties. It describes a method of de-polymerizing lignin of high molecular weight into low molecular weight lignin. More in particular, the invention provides a method for producing lignin with a low molecular weight wherein high molecular weight lignin is contacted with an alkaline laccase at alkaline pH in a reaction vessel and wherein the lignin with a molecular weight below 2 kDa is selectively removed from the reaction vessel during the reaction.
Claims11
A method for producing lignin with a low molecular weight, the method comprising
- contacting high molecular weight lignin with an alkaline laccase at alkaline pH in a reaction vessel, and
- selectively removing lignin with a molecular weight below 2 kDa from the reaction vessel during the contacting.
Dependencies are inferred from the claim text.