Oxidative Production of Vanillin from Industrial Lignin Using Oxygen and Nitrobenzene: A Comparative Study
Journal Title: International Journal of Farming and Allied Sciences - Year 2013, Vol 2, Issue 24
Abstract
Vanillin production from lignin oxidation is a biomass-based process that employs a byproduct of the pulp and paper industry. Lignins are phenolic polymers which are found in plant cell walls with a structure depending strongly on the source of lignin and the process condition, which should be adjusted for different samples. In this work, lignin was extracted from kraft cooking liquor of Pinus eldarica. The amount of extracted lignin was 27%, based on oven dry weight of wood. Comparative oxidation of Pinus eldarica lignin for producing vanillin was separately carried out using oxygen (batch reactor) and alkaline nitrobenzene. The FT-IR spectrum of vanillin was similar to standard. Finally, the vanillin concentration in product solution was analyzed by high performance liquid chromatography (HPLC). The result showed that the amount of vanillin in oxidation of lignin with oxygen was more than that of with nitrobenzene. The yield obtained from oxidation with oxygen and nitrobenzen was 4.2% and 1.2%, respectively.
Authors and Affiliations
Alireza Shakeri, Sepideh Maghsodlou Rad and Ali Ghasemian
Keywords
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