Acid Degradation of Lignin. IV. Analysis of Lignin Acidolysis Products by Gas Chromatography, Using Trimethylsilyl Derivatives.
نویسندگان
چکیده
منابع مشابه
Simplified procedure for recovery of lignin acidolysis products for determining the lignin-degrading abilities of microorganisms.
A simplified procedure for the identification and measurement of single-ring aromatic products of lignin acidolysis is described. The procedure employed a 6-h hydrolysis of spruce milled wood lignin in acidic dioxane at 87 degrees C, followed by a series of organic extractions to recover acidolysis products which were quantified by gas chromatography of trimethylsilyl derivatives. Complex gel p...
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A mild acidic dioxane extraction method was employed to isolate lignin from hardwood bleached chemimechanical pulp (BCMP). The isolated lignin was then purified and undergone elemental analysis. To study the photodegradation behavior, the lignin samples were impregnated onto the Whatman filter papers and irradiated with UV light for various periods. The photolyzed lignin was then recovered and ...
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This study is designed to investigate the biodegradation of high molecular weight (HMW) lignin under sulfate reducing conditions. With a continuously mesophilic operated reactor in the presence of co-substrates of cellulose, the changes in HMW lignin concentration and chemical structure were analyzed. The acid precipitable polymeric lignin (APPL) and lignin monomers, which are known as degradat...
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Studies made in the field of microbiological degradation of lignin have included investigations with sodium and calcium lignosulfonates. Kazanskii and Mikhailova (1936) were unable to grow several wood-rotting fungi on neutralized waste sulfite liquor, but found that infusorial earth mixed cultures could grow albeit slowly (in 50-60 days) if several alterations were made in the composition of t...
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Fast pyrolysis is an efficient technique for thermal degradation of lignin to bio-oils containing bio-phenols for the synthesis of adhesives, resins, and polymers. Lignin has a complex structure, and hence a large number of pyrolytic components are generated during the pyrolysis process. The composition of the pyrolytic products depends on the type of lignin, temperature, types of catalyst, and...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1971
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.25-0889