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化工学报  2015 

酸催化水解阿拉伯胶制备L-阿拉伯糖工艺

DOI: 10.11949/j.issn.0438-1157.20150378, PP. 2528-2533

Keywords: 阿拉伯胶,L-阿拉伯糖,催化水解,催化剂,反应

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Abstract:

阿拉伯胶是提取制备L-阿拉伯糖的理想原料,对阿拉伯胶进行酸催化水解可获得含L-阿拉伯糖、D-半乳糖、L-鼠李糖的反应液,优化酸水解条件使水解液中L-阿拉伯糖的含量和收率均达到最佳水平,是保证后续分离纯化工艺稳定性及产品品质的关键。利用单因素实验考察了反应时间、酸浓度、反应温度、固液比等因素对水解工艺的影响,获得了影响酸水解反应的关键因素及适宜的水解条件。结果表明:温度对L-阿拉伯糖的生成速率有明显影响。经优化,当固液比为1:10(g/ml)、100℃、0.1mol·L-1H2SO4水解90min或90℃、0.1mol·L-1H2SO4水解200min,水解液中L-阿拉伯糖的相对纯度分别达85%和87%,水解收率高达85%。

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