title: Biobutanediol-mediated liquefaction of empty fruit bunch saccharification residues to prepare lignin biopolyols.
abstract: Saccharification residue from empty fruit bunch (EFB) was liquefied with bio-butanediol to produce lignin biopolyols for the preparation of biopolyurethane. To substitute petroleum-derived polyhydric alcohols, butanediol isomers (1,4-butanediol, levo-2,3-bio-butanediol, and meso-2,3-bio-butanediol) or PEG#400-blended butanediol isomers were used as liquefaction solvents in the presence of sulfuric acid catalyst. Lignin biopolyols with a conversion of 63.3%, a hydroxyl number of 582.7 mg KOH/g and an acid number of 21.7 mg KOH/g were obtained under the optimal condition consisting of 25% biomass loading, 3% acid loading, and a temperature of 150°C for 120 min when liquefied with 1,4-butanediol/PEG#400 blended solvent (9/1, w/w). When the levo-2,3-bio-butanediol solvent was used in the absence of PEG#400, the highest conversion, 68.9%, was obtained. Lignin biopolyol-based biopolyurethanes were synthesized with toluene diisocyanate. FT-IR analysis revealed that EFB lignin biopolyols liquefied with bio-butanediols were suitable monomers for the preparation of biopolyurethane.
authors.affiliation: Department of Chemical Engineering, Kyung Hee University, Gyeonggi-do 446-701, Republic of Korea.
authors.forename: Jae Hoon
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Department of Chemical Engineering, Kyung Hee University, Gyeonggi-do 446-701, Republic of Korea. Electronic address: eunylee@khu.ac.kr.
authors.forename: Eun Yeol
authors.initials: EY
authors.lastname: Lee
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002072:Butylene Glycols / Q000032:analysis / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry; D007220:Industrial Waste; D007536:Isomerism; D008031:Lignin / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D011140:Polyurethanes / Q000138:chemical synthesis; D012997:Solvents / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013464:Sulfuric Acids / Q000737:chemistry; D013696:Temperature
chemical_list: D002072:Butylene Glycols; D007220:Industrial Waste; D011108:Polymers; D011140:Polyurethanes; D012997:Solvents; D013464:Sulfuric Acids; C024617:polyol; D011092:Polyethylene Glycols; C039681:1,4-butanediol; D008031:Lignin; C033158:sulfuric acid
keywords: Bio-butanediol isomer; Empty fruit bunch; Lignin biopolyol; Liquefaction; Polyethylene glycol blending