title: Separation of phthalate esters from bio-oil derived from rice husk by a basification-acidification process and column chromatography.
abstract: Solid precipitate containing phthalate esters was obtained from rice-husk-derived oil through a basification-acidification process. After separation by column chromatography, the solid precipitate was divided into two mono-component fractions, two bi-component fractions and a tetra-component fraction. The major compounds of the five fractions were all consisted of phthalate esters. Especially, phthalate esters accounted for a proportion higher than 80% in both Fractions I and II. The generation and precipitation mechanisms of phthalate esters were proposed. Phthalate esters were considered to be derived from a series of complicated chemical reactions of small molecules in the biomass pyrolysis process, and precipitated from bio-oil by catalytic hydrolysis and esterification.
authors.affiliation: Department of Chemistry, University of Science and Technology of China, PR China.
authors.forename: Fanxin
authors.initials: F
authors.lastname: Zeng
authors.forename: Wujun
authors.initials: W
authors.lastname: Liu
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.forename: Han-Qing
authors.initials: HQ
authors.lastname: Yu
authors.forename: Raymond J
authors.initials: RJ
authors.lastname: Zeng
authors.forename: Qingxiang
authors.initials: Q
authors.lastname: Guo
mesh_terms: D000143:Acids / Q000737:chemistry; D000468:Alkalies / Q000737:chemistry; D056804:Biofuels / Q000032:analysis*; D005591:Chemical Fractionation; D011232:Chemical Precipitation; D002845:Chromatography / Q000379:methods*; D004951:Esterification; D004952:Esters / Q000737:chemistry / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D009821:Oils / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry / Q000302:isolation & purification*; D014866:Waste Products / Q000032:analysis*
chemical_list: D000143:Acids; D000468:Alkalies; D056804:Biofuels; D004952:Esters; D009821:Oils; D010795:Phthalic Acids; D014866:Waste Products; C032279:phthalic acid