Efficient Catalysis of Calcium Carbide for the Synthesis of Isophorone from Acetone

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• 作者：Yingjie Li ; Hong Meng ; Yingzhou Lu ; Chunxi Li
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：May 11, 2016
• 年：2016
• 卷：55
• 期：18
• 页码：5257-5262
• 全文大小：413K
• 年卷期：0
• ISSN：1520-5045

文摘

The liquid-phase aldol condensation of acetone for the synthesis of isophorone (IP) was studied under catalysis of CaC₂ powder for the first time. The reaction products were analyzed by gas chromatography, gas chromatography–mass spectrometry, and X-ray diffraction. The catalytic behavior of CaC₂ was studied at varying temperature, particle size, and dosage and compared with that of Ca(OH)₂ and other basic catalysts. It was found that CaC₂ shows excellent catalytic performance because of its strong Lewis basicity and dehydrating ability, and CaC₂ is converted to Ca(OH)₂ and acetylene simultaneously by the resulting water. Higher temperature, smaller catalyst size, and higher mass ratio of CaC₂ are beneficial to the IP synthesis. The overall catalytic performance of CaC₂ is superior to that of all basic catalysts reported heretofore. This process combines the hydrolysis of CaC₂ and the aldol condensation of acetone into a one-pot reaction, which promotes the condensation of acetone greatly along with the quantitative reclamation of acetylene. Thus, this process can be thought of as a green, cost-effective, and efficient route for the synthesis of IP and provides a valuable use of CaC₂.