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One‐step production of alkoxylated ethyl acetate with narrow adduct distribution
Author(s) -
Xia YongMei,
Shen YongAn,
Ji ShiRun,
Fang Yun,
Wang YiYou,
Tan Bing
Publication year - 2007
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1634
Subject(s) - chemistry , catalysis , acetic acid , selectivity , ethyl acetate , yield (engineering) , ethylene oxide , ethanol , ethylene glycol , propylene oxide , organic chemistry , product distribution , nuclear chemistry , materials science , polymer , copolymer , metallurgy
Oligo‐ethylene/propylene glycol ethyl ether acetate (oligo‐EGEEA and oligo‐PGEEA) used to be synthesized in a two‐step process with acetic acid as starting material. This paper describes a one‐step production process catalyzed by the AlMg composite oxide, achieved by alkoxylation of ethyl acetate directly. Aiming at a narrow adduct distribution to get high product selectivity of mono‐derivatives, the alkoxylation parameters, such as the Al/Mg molar ratio of the catalyst, molar ratio of reactants, temperature, initial reaction pressure, and reactant feed rate were investigated. The highest content of mono‐ and di‐derivatives in the products was: w (oligo‐EGEEA) = 73.8%, w (oligo‐PGEEA) = 87.9%, respectively. The product selectivity of mono‐EGEEA was decreased by only 5% after reusing the catalyst for ten runs. A 1.26‐fold increase in the yield of mono‐PGEEA was achieved by treating the catalyst surface with alcoholic potash. Copyright © 2006 Society of Chemical Industry