C - Chemistry – Metallurgy – 08 – H
Patent
C - Chemistry, Metallurgy
08
H
C08H 7/00 (2011.01) C08J 5/04 (2006.01) C08J 7/02 (2006.01)
Patent
CA 2303122
A process for the preparation of a novel lignin derivative, characterized by subjecting a lignophenol derivative having diphenylpropane units prepared by bonding the carbon atom of a phenol derivative ortho to the phenolic hydroxyl group to the benzylic carbon atoms of the phenylpropane basic units of lignin to treatment with an alkali capable of dissociating the above hydroxyl group to thereby bond the oxygen atom of the hydroxyl group to the .beta.-position carbon atom, thus forming an arylcoumaran derivative having arylcoumaran units constituted of the aromatic nuclei of lignin and coumaran skeletons bonded thereto.
L'invention a trait à un procédé de préparation d'un nouveau dérivé de lignine consistant à soumettre un dérivé de lignophénol à motifs de diphénylpropane, obtenus par liaison de l'atome de carbone d'un dérivé de phénol ortho au groupe hydroxyle phénolique aux atomes de motifs basiques de phénylpropane de lignine, à un traitement par un alcali capable de dissocier le groupe hydroxyle susmentionné afin, par le fait, de lier l'atome d'oxygène du groupe hydroxyle à l'atome de carbone en position beta , ce qui donne un dérivé d'arylcoumaran possédant des motifs d'arylcoumaran constitués des noyaux aromatiques de la lignine et des squelettes de coumaran liés à ceux-ci.
Funaoka Masamitsu
Kabushiki Kaisha Maruto
Marks & Clerk
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