ZrO2–MoO3 for the Acetalization of 1,3-Propanediol from Dilute Solutions
ZrO2–MoO3 for the Acetalization of 1,3-Propanediol from Dilute Solutions
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DOI：
10.1021/ie202370q
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发表时间：
2012-04
影响因子：
4.2
通讯作者：
Min Wu;Chun-ling Li;Jin Zhang;Chun-Li Miao;Yingping Zheng;Yueming Sun
中科院分区：
文献类型：
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作者：
Min Wu;Chun-ling Li;Jin Zhang;Chun-Li Miao;Yingping Zheng;Yueming Sun
通过与醛的循环反应形成缩醛（2-甲基-1,3-二恶烷，2MD），在 ZrO2-MoO3 固体多相催化剂上进行了从稀水溶液中回收 1,3-丙二醇 (1,3-PD) 的反应分离方法。研究了催化剂组成、反应温度、反应时间和最佳剂量对缩醛化和水解转化率的影响。对于沉淀-浸渍法制备的ZrO2-10 wt% MoO3，缩醛化反应中1,3-PD的转化率在60 ℃、2 h时达到95.7%，在水解反应中在100 ℃、10 h时缩醛转化率达到97.0%。稳定性测试表明，使用5个周期后1,3-PD转化率仍达到87.3%。就缩醛化的催化活性而言，10 wt%催化剂在模拟发酵液中对1,3-PD表现出比乙醇、2,3-丁二醇和甘油更高的选择性。这表明 ZrO2–10 wt% MoO3 混合氧化物具有最佳...
A reactive isolation approach for the recovery of 1,3-propanediol (1,3-PD) from dilute aqueous solutions was performed on ZrO2–MoO3 solid heterogeneous catalysts through a cyclic reaction with aldehyde to form acetals (2-methyl-1,3-dioxane, 2MD). The effects of catalyst composition, reaction temperature, reaction time, and optimal dose on the conversion rates of acetalization and hydrolysis were investigated. For ZrO2–10 wt % MoO3 prepared by the precipitation–impregnation method, the conversion rate of 1,3-PD in acetalization reached 95.7% at 60 °C for 2 h, and the acetals conversion in the hydrolysis reaction reached 97.0% at 100 °C for 10 h. The stability test showed that the 1,3-PD conversion rate still reached 87.3% after five cycles of use. In terms of the catalytic activity in acetalization, the 10 wt % catalyst exhibited much higher selectivity in the simulated fermentation liquid for 1,3-PD than ethanol, 2,3-butanediol, and glycerol. This indicates that ZrO2–10 wt % MoO3 mixed oxide has the best ...