Thermally assisted hydrolysis and alkylation of lignins in the presence of tetra-alkylammonium hydroxides
1995; Elsevier BV; Volume: 35; Issue: 1 Linguagem: Inglês
10.1016/0165-2370(95)00892-i
ISSN1873-250X
AutoresF. Martı́n, José C. del Rı́o, Francisco Javier González-Vila, T. Verdejo,
Tópico(s)Enzyme-mediated dye degradation
ResumoThree different milled lignins isolated from bamboo, pine and beech, corresponding to the three different structural groups, have been subjected to pyrolysis in the presence of tetramethylammonium hydroxide (TMAH) and tetrabutylammonium hydroxide (TBAH). Pyrolysis of the lignins in the presence of TMAH releases the methyl esters and methyl ethers of the different lignin monomers. Several moieties bearing carboxylic acid groups, not previously detected using pyrolytic techniques, could be released from the three lignins, suggesting that the presence of these moieties in the lignin structure have been underestimated.
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