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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/4795

Title: Low temperature transalkylation of o-diethylbenzene with benzene to ethylbenzene using triflic acid as a catalyst
Authors: Al-Kinany, M.C.
Jibril, B.Y.
Al-Khowaiter, S.H.
Al-Dosari, M.A.
Al-Megren, H.A.
Al-Zahrani, S.M.
Al-Humaizi, K.I.
Keywords: Trifilic acid
Transalkylation
Isomerization
Disproportionation
Ethylbenzene
Diethylbenzenes
Issue Date: 2005
Publisher: Elsevier
Citation: Chemical Engineering and Processing: 44(8); 841–846
Abstract: The catalytic performance of trifluoromethanesulphonic acid (triflic acid) has been investigated for synthesis of ethylbenzene (EB) by transalkylation of o-diethylbenzene (DEB) with benzene (B). Different mole ratios of benzene to the isomer (1:1, 3:1 and 6:1) were used at atmospheric pressure and low temperatures (15–35 ◦C). Ethylbenzene was the main product of the transalkylation. From isomerization reactions, the products were o-diethylbenzene isomers (meta- and para-), and from disproportionation reactions, 1,3,5-triethylbenzene was also obtained. In the case of 1:1 mole ratio of benzene to the isomer, yield of ethylbenzene of 49 mol% was obtained after 6 h of reaction at 35 ◦C. This decreased, at the same temperature, to 25 and 8 mol% for 3:1 and 6:1 mole ratios, respectively. A decrease in the temperature to 25 and 15 ◦C (with 1:1 mole ratio), caused the yield of ethylbenzene to decrease to 43 and 32 mol%, respectively. Similar trends were observed with 3:1 and 6:1 ratios. The conversion of o-diethylbenzene to ethylbenzene and ethylated benzenes appeared to depend strongly on mole ratio of benzene/diethylbenzene at a given temperature. The study has shown that the triflic acid is active as a catalyst for the reaction. It exhibited high yield of ethylbenzene from o-diethylbenzene at low temperatures and atmospheric pressure.
URI: http://dx.doi.org/10.1016/j.cep.2004.08.011
ISSN: 0255-2701
Appears in Collections:College of Engineering

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