Separation and purification of hemicellulose-derived saccharides from wood hydrolysate by combined process.
Prehydrolysis of wood biomass prior to kraft cooking provides a stream containing hemicellulose-derived saccharides (HDSs) but also undesired non-saccharide compounds (NSCs) that were resulted from lignin depolymerization and carbohydrate degradation. In this study, a combined process consisting of lime treatment, resin adsorption, and gel filtration was developed to separate HDSs from NSCs. The macro-lignin impurities that accounted for 32.2% of NSCs were removed by lime treatment at 1.2% dosage with negligible HDSs loss. The majority of NSCs, lignin-derived phenolics, were eliminated by mixed bed ion exchange resin, elevating NSCs removal to 94.0%. The remaining NSCs, furfural and hydroxymethylfurfural, were excluded from HDSs by gel filtration. Chemical composition analysis showed that xylooligosaccharides (XOS) with the degree of depolymerization from 2 to 6 accounted for 28% of the total purified HDSs.
Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China.
Xiaojun
X
Wang
Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China.
Jingshun
J
Zhuang
Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China.
Jungang
J
Jiang
Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China.
Yingjuan
Y
Fu
Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China; Laboratory of Organic Chemistry, Taishan University, Taian 271021, China. Electronic address: qmh@qlu.edu.cn.
Menghua
M
Qin
Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510641, China. Electronic address: wzj@qlu.edu.cn.
Zhaojiang
Z
Wang
D018533:Biomass; D017610:Calcium Compounds / Q000737:chemistry; D050260:Carbohydrate Metabolism; D002241:Carbohydrates / Q000302:isolation & purification*; D002850:Chromatography, Gel / Q000379:methods*; D005662:Furaldehyde / Q000031:analogs & derivatives / Q000302:isolation & purification; D006868:Hydrolysis; D007475:Ion Exchange Resins; D008031:Lignin / Q000737:chemistry / Q000378:metabolism; D010087:Oxides / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry*; D032107:Populus / Q000737:chemistry; D014934:Wood / Q000737:chemistry*
D017610:Calcium Compounds; D002241:Carbohydrates; D007475:Ion Exchange Resins; D010087:Oxides; D011134:Polysaccharides; C008046:5-hydroxymethylfurfural; C007916:hemicellulose; D008031:Lignin; C016538:lime; D005662:Furaldehyde
Hemicellulose; Hydrolysis; Lignin; Purification; Saccharide