Obtaining Aromatic Aldehydes from Biobutanol Production Wastes
V. E. TARABANKO, K. L. KAYGORODOV, N. V. KOROPACHINSKAYA, YU. V CHELBINA and A. A. IL’IN
Institute of Chemistry and Chemical Technology, Siberian Branch of the Russian Academy of Sciences, Ul. K. Marksa 42, Krasnoyarsk 660049 (Russia)
veta@icct.ru
Keywords: vanillin, syringaldehyde, wood, aspen, biobutanol enzymatic lignin, wastes, technology, catalytic oxidation, mechanism
Pages: 425–430
Abstract
A catalytic process of the oxygen-driven oxidation of aspen wood and enzymatic lignin as a waste of processing aspen wood into biobutanol was investigated in a static reactor using a rotating magnetic stirrer in an alkaline medium. The effect of temperature and of a mode of alkali feeding into reactor on the yield of syringaldehyde and vanillin was studied. It has been established that the fermentation lignin is close to the native lignin being much more efficient as compared with lignosulphonates for using as a feedstock for the preparation of vanillin and syringaldehyde. Separation is experimentally realized concerning the stages of lignin oxidation by oxygen, on the one hand, and the retro-aldol cleavage of oxidation products into vanillin and syringaldehyde, on the other hand.
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