CHEMICAL PROCESSING OF AGRICULTURE WASTES INTO VANILLIN, PULP AND GLUCOSE
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Published:2023-12-15
Issue:4
Volume:
Page:137-145
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ISSN:1029-5143
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Container-title:chemistry of plant raw material
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language:
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Short-container-title:JCPRM
Author:
Golubkov Viktor A.,Tarabanko Valery E.,Kaygorodov Konstantin L.,Shestakov Semen L.,Chelbina Yulia V.,Smirnova Marina A.,Popov Arkady A.,Skripnikov Andrey M.,Vigul Dmitry O.,Borovkova Valentina S.
Abstract
Agrotechnical wastes from processing herbaceous plants consist of lignin and polysaccharides, which can be processed into monomers – phenols and carbohydrates. The prospects of chemical processing of several agrotechnical waste types with a high lignin content (flax shives, sunflower seed husks and buckwheat husks) into vanillin, pulp, and glucose by oxidation and acid hydrolysis were studied. It has been shown that despite the distant phylogenetic relationship of the studied plants, their lignins have a similar structure: they contain a similar amount of methoxyl groups (10–13 wt.% per lignin) and give close yields of aromatic aldehydes upon oxidation with nitrobenzene (17–19%) and oxygen (14–16%). In general, the suitability of agrotechnical wastes for oxidation to aromatic aldehydes determines by the lignin content. Among the studied wastes, flax shives are the most promising feedstock for chemical processing into vanillin and glucose. Cellulose-containing solid residues of oxidation process are more easily hydrolyzed compared to the initial lignocellulosic biomass. The inversion of glucose oligomers during the hydrolysis of cellulose with H2SO4 is limited by the hydrolysis of the tetra- and octamers.
Publisher
Altai State University
Subject
Organic Chemistry,Plant Science,Biomaterials
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