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Selective Hydroalkoxylation of 1-Hexene with 1-Propanol and 1-Butanol over Zeolite Beta Catalyst

Authors

  • Sambhu Radhakrishnan,

    1. Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg-23, 3001 Leuven (Belgium), Fax: (+32) 1632-1998
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  • Grete Thoelen,

    1. Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg-23, 3001 Leuven (Belgium), Fax: (+32) 1632-1998
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  • Dr. Joris Franken,

    1. Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg-23, 3001 Leuven (Belgium), Fax: (+32) 1632-1998
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  • Prof. Jan Degrève,

    1. Department of Chemical Engineering, KU Leuven, W. de Croylaan 46 Bus 2423, 3001 Leuven (Belgium)
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  • Prof. Christine E. A. Kirschhock,

    1. Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg-23, 3001 Leuven (Belgium), Fax: (+32) 1632-1998
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  • Prof. Johan A. Martens

    Corresponding author
    1. Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg-23, 3001 Leuven (Belgium), Fax: (+32) 1632-1998
    • Centre for Surface Chemistry and Catalysis, KU Leuven, Kasteelpark Arenberg-23, 3001 Leuven (Belgium), Fax: (+32) 1632-1998
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Abstract

Etherification of 1-hexene with 1-propanol and 1-butanol representative of bioalcohols was performed in a liquid-phase continuous-flow process over a fixed bed of zeolite beta catalyst. Contact time and reaction temperature were optimized to maximize conversion and limit deactivation. The catalyst was stable for at least 14 h on stream. In the conversion of 1-hexene with 1-propanol, zeolite beta catalyst showed over 90 % selectivity for 2-propoxyhexane. In the conversion of 1-hexene and 1-butanol, 2-butoxyhexane was selectively formed. Dialkyl ether from the alcohol and dodecenes and hexanol from 1-hexene were the main side products. As 1-alkenes and terminal alcohols can be synthesized from biomass, this hydroalkoxylation process could be used for grading up green chemicals to high-boiling solvents and renewable ethers for the diesel pool.

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