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Front. Chem. Sci. Eng.    2010, Vol. 4 Issue (1) : 57-64     DOI: 10.1007/s11705-009-0295-1
Research articles |
Purification and crystallization of xylitol from fermentation broth of corncob hydrolysates
Purification and crystallization of xylitol from fermentation broth of corncob hydrolysates
Jinchao WEI,Qipeng YUAN,Tianxin WANG,Le WANG,
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
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Abstract:Xylitol, a five-carbon sugar alcohol, is a valuable sugar substitute, and widely used in the pharmaceutical, odontological and food industry due to its interesting properties. In the past decades, the xylitol industry has grown rapidly and more attention has been focused on xylitol purification, which possesses an important proportion of the whole industry. In our paper, the purification and crystallization of xylitol fermentation broth by biotechnology using corncob hydrolysates as substance were studied. An initial xylitol fermentation broth was decolored with activated carbon (1% M-1, 60°C, 165rpm), desalted with a combination of two ion-exchange resins (732 and D301), and residual sugars were separated with UBK-555(Ca2+). Then the solution was vacuum-concentrated up to supersaturation (750g/L xylitol). After adding 1% xylitol crystal seeds, the supersaturated solution was cooled to −20°C for 48h. The crystalline xylitol of a regular tetrahedral shape with purity 95% and crystallization yield 60.2% was obtained from the clarified xylitol fermentation broth. An intact, economical and environmental-friendly route of purification and crystallization of xylitol from fermentation of corncob hydrolysates was obtained, and its experimental procedure and data provided a sound basis for large-scale industrial production.
发布日期: 2010-03-05
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Qipeng YUAN
Jinchao WEI
Tianxin WANG
Le WANG
引用本文:   
Qipeng YUAN,Jinchao WEI,Tianxin WANG, et al. Purification and crystallization of xylitol from fermentation broth of corncob hydrolysates[J]. Front. Chem. Sci. Eng., 2010, 4(1): 57-64.
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http://journal.hep.com.cn/fcse/EN/10.1007/s11705-009-0295-1     OR     http://journal.hep.com.cn/fcse/EN/Y2010/V4/I1/57
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