Intermediate for the production of lignin polymers and their...

C - Chemistry – Metallurgy – 08 – H

Patent

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C08H 7/00 (2011.01) C08H 8/00 (2010.01) C08L 97/00 (2006.01) C08L 97/02 (2006.01) C09D 197/00 (2006.01) C12P 7/22 (2006.01) D21H 19/14 (2006.01) D21H 21/20 (2006.01)

Patent

CA 2277784

The invention relates to an intermediate for the production of polymers from lignin derivatives from the pulp industry, produced by processing lignin derivatives with phenol oxidizing enzymes in the presence of oxidation agents. The invention is characterized in that the lignin derivatives a) are subjected to enzyme treatment for more than 3 hours in the presence of air, or b) are subjected to enzyme treatment for more than 10 minutes while air or oxygen is passed through them, or c) are oxidized by treatment with chemical oxidation agents. The intermediate is used for the production of polymers of lignin derivatives from the pulp industry, of fiber reinforced duroplastic composite materials from plant fibers, of waterproof papers and cardboards, as well as duroplastics from lignin derivatives.

Produit intermédiaire pour la production de polymères de dérivés de la lignine dans l'industrie de la cellulose, obtenu par traitement desdits dérivés de lignine par des enzymes oxydant le phénol, en présence d'agents oxydants, caractérisé en ce que les dérivés de lignine a) sont soumis à un traitement enzymatique, pendant plus de 3 heures, en présence d'air, ou bien, b) sont soumis à un traitement enzymatique, pendant plus de 10 minutes, avec balayage d'air ou d'oxygène, ou bien, c) sont oxydés par traitement avec des oxydants chimiques. Le produit intermédiaire est utilisé pour la production de polymères de dérivés de lignine, en provenance de l'industrie de la cellulose, ainsi que de composites duroplastes renforcés par des fibres, à base de fibres végétales, de papiers et de cartons imperméabilisés, et de duroplastes à base de dérivés de lignine.

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