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【答案】应助回帖
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赵飞媛: 金币+30, 翻译EPI+1, ★有帮助, 谢谢你 2015-10-18 22:06:12
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The experiment using malt sugar as raw materials and respectively using NaHSO4, Zn(CH3COO)2, H3PO4, NaOH, H2SO4 as catalyst to convert into 5-HMF by dehydration condensation under 95℃. Take the absorbance values of the 5-HMF when its λ equals to 284mm as the measure of the extent of reaction. Choose NaOH as catalyst after comparing the related data. Get the best reaction condition with analyzing experiment data with various temperature, time and reagents. The result is malt sugar and NaOH with 5:1 to react for about 7 hours under 90 ℃. |
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