乙醇溶析结晶法由棉籽壳制备木糖

采用乙醇溶析结晶方法，以棉籽壳为原料，经一系列处理步骤，得到一种木糖晶体产品；对该晶体产品进行了红外光谱分析、熔程分析、环境扫描电镜分析、液相色谱分析和粒度分析。结果表明，该晶体产品与由玉米芯得到的木糖晶体具有类似的红外光谱曲线和熔程，但在晶形上，该晶体呈长棱形，而玉米芯木糖晶体呈方形；按本文优化的操作条件进行操作，结晶产品纯度为99.64%，收率为77.6%，中间粒度(M.S.)为151μm，变异系数(C.V.)为47%。表明乙醇溶析结晶是一种很有潜力的结晶方法。

Production of d-xylose from cottonseed hull by ethanol solventing-out crystallization

Xylose crystal was obtained from cottonseed hull by the ethanol solventing-out crystallization process.The crystal was analyzed and determined by infrared spectrometer (IR),melting point tester, environmental scanning electron microscope (ESEM),high performance liquid chromatography (HPLC), and particle analyzer.The results showed that this xylose crystal is similar to that came from corncob in the IR spectroscopy and melting point, but their shape is different, the former likes long prism and the later is square.Under the optimized operation conditions, the purity of the crystal could be up to 99.64%(mass), and the yield 77.6%.The particle size at mediam is 151 μm with the variation 47%.These data indicate that ethanol solventing-out crystallization can be an industrial potential method for production of xylose.