title: The use of sugar beet pulp lignin for the production of vanillin.
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, CuSO4as 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°fand ΔHc.
authors.affiliation: 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.
authors.forename: Aazam
authors.initials: A
authors.lastname: Aarabi
authors.affiliation: Department of Food Science and Technology, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Maryam
authors.initials: M
authors.lastname: Mizani
authors.affiliation: Department of Food Science and Technology, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Masoud
authors.initials: M
authors.lastname: Honarvar
mesh_terms: D001547:Benzaldehydes / Q000138:chemical synthesis*; D027461:Beta vulgaris / Q000737:chemistry; D003460:Crystallization; D006863:Hydrogen-Ion Concentration; D008031:Lignin / Q000737:chemistry*; D010084:Oxidation-Reduction; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D001547:Benzaldehydes; D008031:Lignin; C100058:vanillin
keywords: Lignin oxidation; Sugar beet pulp; Vanillin