Method and an apparatus for forming a lignin fraction, a lignin composition and its use
AssigneeUpm-Kymmene Corporation
InventorMauno Miettinen
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Abstract
The invention relates to a method and an apparatus for forming a lignin fraction from crude lignin which has been processed by means of a treatment step selected from enzymatic treatment, treatment with ionic liquid and their combinations. The method comprises treating the crude lignin (1) by a lignin liberation in at least one lignin liberation step (3), and separating a lignin fraction (6) in at least one separation step (5). Further, the invention relates to a lignin composition and its use.
Claims16
A method for forming a lignin fraction from crude lignin which has been processed using enzymatic treatment, treatment with ionic liquid, or the combination thereof, wherein the method comprises:
- treating the crude lignin by a lignin liberation in at least one lignin liberation step to form two solid phases, the crude lignin having a glucan content of 3-70% by weight, analyzed as glucose;
- and
- separating a lignin fraction and a lignocellulose fraction in at least one solid-solid separation step after the lignin liberation.
Dependencies are inferred from the claim text.