Selective synthesis of 2,5-dimethyl-2,4-hexadiene by condensation of iso-butyl aldehyde with tert-butyl alcohol over molecular sieve catalysts

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• 作者：Wang ; Hua ; Liu ; Zhongmin ; Sun ; Chenglin ; Wang ; Gongwei
• 关键词：2 ; 5-Dimethyl-2 ; 4-hexadiene ; HZSM-5 molecular sieve ; Iso-butyl aldehyde ; Liquid-phase ; Prins reaction ; Tert-butyl alcohol
• 刊名：Catalysis Communications
• 出版年：2004
• 出版时间：January, 2004
• 年：2004
• 卷：5
• 期：1
• 页码：41-43
• 全文大小：145 K

文摘

Several molecular sieve catalysts have been investigated for Prins condensation of iso-butyl aldehyde with tert-butyl alcohol in a liquid phase reaction. The results demonstrate that acidic molecular sieves are effective catalysts for the condensation reaction, and HZSM-5 molecular sieves possessed strong enough acidity and proper channel systems exhibit high activity and selectivity. Up to 78.6 % iso-butyl aldehyde conversion is obtained with a 57.8 % 2,5-dimethyl-2,4-hexadiene yield over HZSM-5 with Si/Al of 39 after 8 h at 160 °C, which provides a useful and economical potential industrial application way on a large scale to manufacture 2,5-dimethyl-2,4-hexadiene.