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頁籤選單縮合
題 名 | A Study of Donnan Equilibria and Selectivities of Salt-Sugar Solutions for the Desugarization of Cane Molasses (Ⅰ) |
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作 者 | Gupta,B.; Bhatt,S.; Shukla,R. P.; | 書刊名 | Taiwan Sugar |
卷 期 | 44:1 民86.01-02 |
頁 次 | 頁14-21 |
分類號 | 463.31 |
關鍵詞 | 蔗糖; |
語 文 | 英文(English) |
英文摘要 | Donnan (ion-exclusion) equilibria and selectivities of sodium chloride-dextrose-sucrose mixtures have been studied on a strongly acidic cation exchange resin (Dowex 50) in a nonexchangeable (Na��) form. The effect of six variables was studied, i.e. % cross-linking and particle size of the resin, feed volume and concentration of the feed, flow rate and temperature. Analysis of the equilibrium curves indicated that an increase in feed volum (% bed-volume) increased the yield of products per batch but decreased the recovery. A decrease in % crosslinking of the resin markedly improved the product separation but gave slightly diluted products whereas, a finer mesh resin increased the purity as well as the concentration of the products. Higher feed concentrations increased the product concentrations but decreased their purities and the recoveries. A high flow rate resulted in a worse separation, i.e. purity drop and decreased product concentration. An increased column temperature (70 ℃) under the high flow rate conditions, however, restored the product concentration. Overall, sodium chloride-dextrose separations were better than sodium chloride-sucrose separations. |
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