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Effective synthesis of cis-3-hexen-1-yl acetate via transesterification over KOH/γ-Al2O3: Structure and catalytic performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
40341 45851 2013 7 PDF Available
Title
Effective synthesis of cis-3-hexen-1-yl acetate via transesterification over KOH/γ-Al2O3: Structure and catalytic performance
Abstract

Cis-3-hexen-1-yl acetate is a significant green note flavor compound and widely used in the food and cosmetic industry. In this research, a series of solid base KOH/γ-Al2O3 have been prepared and been utilized for the synthesis of cis-3-hexen-1-yl acetate via transesterification from cis-3-hexen-1-yl and ethyl acetate. The catalysts were also characterized by several physic-chemical techniques such as X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, N2 adsorption, CO2-temperature-programmed desorption (CO2-TPD), and X-ray fluorescence (XRF). 30%KOH/Al2O3 was suggested to be the best conversion due to the cis-3-hexen-1-ol conversion of 59.3% at a temperature 88 °C within 2 h. Characterization results showed that KOH transformed into Al–O–K and K2O·CO2 species during the calcination process. It was confirmed that K2O·CO2 disappeared and Al–O–K groups existed on the surface of the water-washing 30%KOH/Al2O3 which was inactive for transesterification. K2O·CO2 species might be the major active species on KOH/Al2O3, and Al–O–K groups was inactive for cis-3-hexen-yl acetate synthesis.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (150 K)Download as PowerPoint slideHighlights► Synthesis of cis-3-hexen-1-yl acetate via transesterification catalyzed by KOH/γ-Al2O3. ► Cis-3-hexen-1-yl acetate was synthetized at a low temperature (88 °C). ► The K2O·CO2 species were main active compounds on the surface of KOH/γ-Al2O3. ► The catalyst only containing Al–O–K groups without K2O·CO2 species was inactive for transesterification.

Keywords
Cis-3-hexen-1-yl acetate; Cis-3-hexen-1-ol; Transesterification; KOH/γ-Al2O3; Flavor
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Effective synthesis of cis-3-hexen-1-yl acetate via transesterification over KOH/γ-Al2O3: Structure and catalytic performance
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 455, 30 March 2013, Pages 1–7
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us