The use of sugar beet pulp lignin for the production of vanillin

Aazam Aarabi; Maryam Mizani; Masoud Honarvar

doi:10.1016/j.ijbiomac.2016.10.004

The use of sugar beet pulp lignin for the production of vanillin

Int J Biol Macromol. 2017 Jan;94(Pt A):345-354. doi: 10.1016/j.ijbiomac.2016.10.004. Epub 2016 Oct 4.

Authors

Aazam Aarabi¹, Maryam Mizani², Masoud Honarvar²

Affiliations

¹ Department of Food Science and Technology, Shahreza Branch, Islamic Azad University, Shahreza, Iran; Department of Food Science and Technology, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran. Electronic address: aarabi@iaush.ac.ir.
² Department of Food Science and Technology, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran.

PMID: 27717789
DOI: 10.1016/j.ijbiomac.2016.10.004

Abstract

The objectives of this work is to produce vanillin from sugar beet pulp by lignin oxidation and evaluate the effect of process parameters (temperature, partial pressure of oxygen, reaction time, CuSO₄ as a catalyst) on the yield of vanillin. Purification and separation of vanillin from pressurized extract was carried out by organic solvent and crystallization. HPLC, FT-IR, H NMR, GC/MS and DSC methods were performed to approve the vanillin crystal. Results showed that production of vanillin was significantly affected by four parameters, and an optimal conditions for production of vanillin was found 4.3bar for an oxygen partial pressure under a temperature of 156°C and duration of time 30min without CuSO₄, corresponding to 1439.3mg/100g vanillin. Thermal property of syntesis vanillin was coincide to DSC pure vanillin curve but there were differences in ΔH°_f and ΔH_c.

Keywords: Lignin oxidation; Sugar beet pulp; Vanillin.

MeSH terms

Benzaldehydes / chemical synthesis*
Beta vulgaris / chemistry
Crystallization
Hydrogen-Ion Concentration
Lignin / chemistry*
Oxidation-Reduction
Spectroscopy, Fourier Transform Infrared

Substances

Benzaldehydes
Lignin
vanillin