FIELD: chemistry.
SUBSTANCE: disclosed is a method of producing lignin fragments, a lignin fragment and use thereof. Method of production involves heating the composition under acidic conditions together with aldehyde (1) and separating lignin fragments containing one or more functional groups from the mixture. In formula (1), L is absent or is an aliphatic linking group containing from 1 to 6 carbon atoms, or an aromatic linking group containing from 4 to 15 carbon atoms, R is a functional group selected from a group consisting of a carboxylic acid, an ether, an aldehyde, a chloride and a hydroxyl, x is integer from 1 to 5.
EFFECT: providing a method of producing lignin fragments which, according to the desired application, already contain active functional groups, or in which said functional groups can be further derivatized for the desired purpose.
13 cl, 5 dwg, 11 ex
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