کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7591809 | 1492108 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ion-exchange equilibrium of N-acetyl-d-neuraminic acid on a strong anionic exchanger
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
N-acetyl-d-neuraminic acid (Neu5Ac) is a high value-added product widely applied in the food industry. A suitable equilibrium model is required for purification of Neu5Ac based on ion-exchange chromatography. Hence, the equilibrium uptake of Neu5Ac on a strong anion exchanger, AD-1 was investigated experimentally and theoretically. The uptake of Neu5Ac by the hydroxyl form of the resin occurred primarily by a stoichiometric exchange of Neu5Acâ and OHâ. The experimental data showed that the selectivity coefficient for the exchange of Neu5Acâ with OHâ was a non-constant quantity. Subsequently, the Saunders' model, which took into account the dissociation reactions of Neu5Ac and the condition of electroneutrality, was used to correlate the Neu5Ac sorption isotherms at various solution pHs and Neu5Ac concentrations. The model provided an excellent fit to the binary exchange data for Clâ/OHâ and Neu5Acâ/OHâ, and an approximate prediction of equilibrium in the ternary system Clâ/Neu5Acâ/OHâ. This basic information combined with the general mass transfer model could lay the foundation for the prediction of dynamic behavior of fixed bed separation process afterwards.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 183, 15 September 2015, Pages 259-264
Journal: Food Chemistry - Volume 183, 15 September 2015, Pages 259-264
نویسندگان
Jinglan Wu, Xu Ke, Xudong Zhang, Wei Zhuang, Jingwei Zhou, Hanjie Ying,