Synthesis of Propylene Carbonate from Urea and 1,2-Propylene Glycol in a Monolithic Stirrer Reactor

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• 作者：Dongfang Wu ; Yali Guo ; Shu Geng ; Yinghao Xia
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：January 23, 2013
• 年：2013
• 卷：52
• 期：3
• 页码：1216-1223
• 全文大小：379K
• 年卷期：v.52,no.3(January 23, 2013)
• ISSN：1520-5045

文摘

A monolithic stirrer reactor, in which the cordierite monolith-supported metal oxide and mixed-metal oxide catalysts are used as stirrer blades, is applied for the alcoholysis of urea with 1,2-propylene glycol to synthesize propylene carbonate. It is shown that the mixed-metal oxides give much higher urea alcoholysis performances than the metal oxides, arising from the existence of a strong synergetic effect in the mixed-metal oxides. The zinc鈥揷hromium mixed oxide not only shows an excellent catalytic performance but also has extremely strong adhesion strength on the monolithic substrate. For the monolith-supported zinc鈥揷hromium mixed oxide catalyst, the monolithic stirrer reactor performs very well, and the highest yield of propylene carbonate reaches 97.8%. The performance is comparable to that of a conventional mechanically agitated slurry reactor, revealing the monolithic stirrer reactor can be an attractive alternative to the slurry reactor for heterogeneously catalyzed liquid鈥搇iquid reactions.