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Citation
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HERO ID
4641884
Reference Type
Journal Article
Title
Effect of water addition on the simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol over amberlyst (TM) 35
Author(s)
Soto, R; Fite, C; Ramirez, E; Tejero, J; Cunill, F
Year
2015
Is Peer Reviewed?
Yes
Journal
Catalysis Today
ISSN:
0920-5861
Volume
256
Page Numbers
336-346
DOI
10.1016/j.cattod.2014.12.031
Web of Science Id
WOS:000360657000014
Abstract
The simultaneous liquid-phase etherification of isobutene and isoamylenes with ethanol has been carried out at 353 K over Amberlyst (TM) 35. The initial molar ratios of alcohol/olefins and isobutene/isoamylenes were both maintained constant at 0.5 and 1, respectively. The effect of water presence on the reaction system has been studied by the addition of water to the initial reactant mixture, ranging from 0 to 1 wt.%. Under experimental conditions, product distribution, as well as etherification reaction rates, have been clearly affected by the addition of water. Water favors the formation of tertiary alcohols through olefins hydration because of its preferential adsorption on the active sites, while it hinders etherification and dimerization reactions. The inhibitory effect of water was more noticeable on dimerization than on etherification. Based on specific theories about the dissociation of the active sites from the catalytic network, the amount of water required to dissociate all the sulfonic groups has been estimated. Finally, the feasibility of the bioethanol use as a reactant has also been evaluated. (C) 2015 Elsevier B.V. All rights reserved.
Keywords
Olefins hydration; Simultaneous liquid phase etherification; ETBE and TAEE; Bioethanol
Tags
IRIS
•
tert-Amyl ethyl ether (TAEE)
Initial Litsearch 6/2018
WOS
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