Abstract
Abstract Aldol condensation of n-butyraldehyde to produce 2-ethylhexenal in gas-phase over solid catalysts based on niobium, tantalum or tungsten oxide supported on silica was studied. The catalysts were prepared by different procedures based on co-precipitation or impregnation methods and characterized by X-ray fluorescence, scanning electron microscopy and specific surface-area determinations. The self-condensation of n-butyraldehyde in the temperature range 150-350°C, at contact times of 1-8 s, and through a continuous-flow microreactor at atmospheric pressure, was investigated. Supported niobium oxide, either co-precipitated or impregnated, gave better yields than both tantalum and tungsten oxide, with selectivities to 2-ethylhexenal higher than 95% up to 250°C. The performances of the niobium oxide-supported catalyst were also much better than those hitherto stated in the literature for a catalyst based on reduced tin supported on silica gel.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
