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Conversion of 1-hexanol to di-n-hexyl ether on acidic catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42134 45912 2010 7 PDF Available
Title
Conversion of 1-hexanol to di-n-hexyl ether on acidic catalysts
Abstract

Conversion, selectivity and yield of 1-hexanol liquid phase dehydration to di-n-hexyl ether (DNHE) were determined at 150–190 °C on three acidic catalysts, the thermally stable resin Amberlyst 70, the perfluoroalkanesulfonic Nafion NR50 and the zeolite H-BEA-25, in a batch reactor. The highest conversion and yield were achieved on Amberlyst 70 at 190 °C, but the most selective catalyst was Nafion NR50. Good results were obtained at 190 °C on the zeolite. Apparent activation energies for the three catalysts were in the range 108–140 kJ/mol. Unlike H-BEA-25, the reaction of DNHE synthesis on Amberlyst 70 and NR50 was a bit more active but less selective than the analogous 1-pentanol dehydration to di-n-pentyl ether (DNPE).

Graphical abstractThe reaction of dehydration of hexanol to di-n-hexyl ether (DNHE) has been studied on Amberlyst 70 (a thermally stable ion-exchange resin), NR50 (a Nafion catalyst) and the zeolite H-BEA-25 at 150–190 °C. The resin Amberlyst 70 gives the highest conversion and yield, but NR50 was a little more selective. Besides DNHE, hexanes, and branched ethers were detected as by-products. The attached graph shows hexanol conversion (XHexanol) and selectivity to DNHE (SDNHE), branched ethers (Sethers) and C6 olefins (Salkenes) at 190 °C over 1 g Amberlyst 70. As seen a selectivity of about 88% is obtained, quite attractive to a potential industrial process of obtaining the ether.Figure optionsDownload full-size imageDownload high-quality image (66 K)Download as PowerPoint slide

Keywords
Di-n-hexyl ether; 1-Hexanol; Amberlyst 70; Nafion NR50; H-BEA-25; Dehydration reaction
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Conversion of 1-hexanol to di-n-hexyl ether on acidic catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 374, Issues 1–2, 1 February 2010, Pages 41–47
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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