Abstract
The separation of vanillin from soda lignin that was extracted from black liquor of oil palm empty fruit bunches (EFB) using 20% sulfuric acid is presented in this paper. The degradation of soda lignin using alkaline nitrobenzene oxidation was carried out at 165 ° C for 3 hours in a 2 M NaOH and nitrobenzene solution. One of the major products obtained from the breakdown of lignin is vanillin. The crys- tallization process was used as a method to separate vanillin from other compounds. Based on the solubility of vanillin in acetone, 15 mL of acetone was added to the residue of the oxidized products. The mixture was slowly heated to 40 - 50 ° C for 15 minutes until the vanillin crystalline precipitated. A yield of about 1.6% vanillin was isolated from 50 mg sample of lignin. The isolated compound was analyzed utilizing high performance liquid chromatography, Fourier transform infrared spec- trophotometry (FTIR) and nuclear magnetic resonance ( 1 H-NMR). The results of the characterization studies proved that the isolated compound was vanillin.
Published Version
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