Isopropylation of xylenes catalyzed by ultrastable zeolite Y (USY) and some other solid acid catalysts
Metadata of CSIR Papers
View Archive Info| Field | Value | |
| Title |
Isopropylation of xylenes catalyzed by ultrastable zeolite Y (USY) and some other solid acid catalysts
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| Creator |
Patra, CR
Kumar, R |
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| Subject |
Chemistry, Physical; Engineering, Chemical
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| Description |
The isopropylation of all three xylene isomers was carried out over ultrastable zeolite Y (USY) catalyst to give corresponding dimethyl (1-methylethyl) benzenes, or in other words dimethyl cumenes (DMCs), using isopropanol as alkylating agent. The effect of reaction temperature, space velocity, substrate-to-alkylating-agent molar ratio, and time-on-stream on conversion of xylene isomers and selectivity to dimethyl cumene was studied. Isopropylation of xylenes over USY gives quite high (80 to 95%) DMC selectivity among the dimethyl cumenes, along with a 70-90% yield of DMCs in total products with respect to limiting reagents, i.e., isopropylating agents at relatively low reaction temperatures (423 +/- 10 K) and at quite high xylene conversions (85-97% of theoretical maximum value). The solid acid catalysts zeolites H-Y, H-beta, H-mordenite, as well as silica-alumina and sulfated zirconia, were included for comparative studies in the isopropylation of m-xylene. (C) 2002 Elsevier Science (USA).
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| Publisher |
ACADEMIC PRESS INC ELSEVIER SCIENCESAN DIEGO525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USA
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| Date |
2011-09-24T09:45:45Z
2011-09-24T09:45:45Z 2002 |
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| Type |
Article
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| Identifier |
JOURNAL OF CATALYSIS
0021-9517 http://hdl.handle.net/123456789/24195 |
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| Language |
English
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