论文部分内容阅读
着重研究以原位合成碘(即三氯化铬和碘化钠发生氧化还原反应产生的碘)为催化剂,蔗糖为原料制备羟甲基糠醛。考察了反应时间、反应温度、催化剂用量(以三氯化铬和碘化钠质量计)、蔗糖质量百分数对羟甲基糠醛收率的影响。得到以原位合成碘为催化剂的优化条件:时间45min、温度130℃、催化剂用量0.25g、蔗糖质量百分数8%。在此优化条件下,用单质碘做催化剂制备羟甲基糠醛,把两者的结果相比较。以原位合成碘为催化剂,收率达到79.5%(根据果糖部分计算);以碘为催化剂,收率达到51.1%。产物经紫外可见分光光度计检测。
Focus on the synthesis of iodine in situ (ie chromium trichloride and sodium iodide redox reaction produced by the catalyst), sucrose as raw material to produce hydroxymethyl furfural. The effects of reaction time, reaction temperature, amount of catalyst (mass of chromium trichloride and sodium iodide) and mass percentage of sucrose on the yield of HMF were investigated. The optimum conditions for the synthesis of iodine in situ were as follows: time 45min, temperature 130 ℃, catalyst dosage 0.25g, mass fraction of sucrose 8%. Under this optimized condition, hydroxymethylfurfural was prepared using elemental iodine as a catalyst, and the results of the two were compared. In situ synthesis of iodine as catalyst, the yield reached 79.5% (calculated according to the fructose part); with iodine as catalyst, the yield reached 51.1%. The product was detected by UV-Vis spectrophotometer.