Synthesis of Vanillin from Lignin
Chemical Science International Journal,
Vanillin (4-hydroxy-3-methoxybenzaldehyde) is the major flavour constituent of vanilla. It has a wide range of applications in food industry and in perfumery. Vanillin is also very useful in the synthesis of several pharmaceutical chemicals. Lignin is a phenolic polymer which is 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 wood ash. The amount of extracted lignin was 25.5%, based on oven dry weight of wood ash. The lignin obtained was then reacted with alkaline nitrobenzene and refluxed at 170°C for 3 hours to obtain vanillin. The FT-IR spectrum of vanillin was similar to standard. The yield obtained from oxidation with nitrobenzene was 3.9%.
- FT-IR and Lignin
How to Cite
Borges Da Silva EA, Zabkova M, Araojo JD, Cateto CA, Barreiro MF, Belgacem MN, Rodrigues AE. An integrated process to produce vanillin and lignin-based polyurethanes from Kraft lignin, Chemical Engineering Research and Design. 2009; 87:1276–1292.
Mussato SI, Fernandes M, Roberto IC. Lignin recovery from brewer’s spent grain black liquor; 2007.
Araujo JDP, Grande Carlos A, Rodrigues Alirio E. Vanillin production from lignin oxidation in a batch reactor, Chemical Engineering Research and Design. 2010; 88:1024-1032.
Boeriu CG, Bravo D, Gosselink RJA, Van Dam JEG. Characterization of structure dependent functional properties of lignin with infrared spectroscopy. Ind. Crops Prod. 2004;20:205-218.
Gunasekeran S, Ponusammy S. Vibrational spectra and normal cordinate analysis on organic non-linear opticacrystsal 3- methoxy-4-Hydroxy benzaldehyde. Indian Journal of Pure and Applied physics. 2005;43:838-843.
Shamsuri A, Abdullah DK. A preliminary study of oxidation of lignin from rubber wood to vanillin in ionic liquid medium. Oxidation Communications. 2013;34(3): 767-775.
Baptista C, Robert A, Duarte AP. Effects of pulping conditions on lignin structure and delignification degree in Pinus Pinaster Kraft pulps, Bioresource Technology. 2006;121:153-158.
Glidewell C, Low JN, Melguizo M, Quesda A. 4-Amino-2, 6-Dimethoxypyrimidine: hydrogen-bonded sheets of R22 (8) and R66 (28) rings, reinforced by an aromatic Pi-Pi stacking.
Rose C, Kennedy. The flavour rundown: Natural vs artificial flavours. Harvard University; 2018.
Shakeri A, Sepideh M, Ghasemian. Oxidative production of vanillin from industrial lignin using oxygen and nitrobenzene: A comparative study. International Journal of farming. 2013; 1166-1170.
Abstract View: 2508 times
PDF Download: 911 times