@article { ISI:000237725100015, title = {Regioselective nitration of cumene to 4-nitro cumene using nitric acid over solid acid catalyst}, journal = {Catalysis Communications}, volume = {7}, number = {6}, year = {2006}, month = {JUN}, pages = {394-398}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

The regioselective nitration of cumene to 4-nitro cumene (4-NC) has been carried out using 70\% nitric acid over MoO3/SiO2 solid acid catalyst with high conversion (62\%) and selectivity (68\%) for 4-NC. A series of MoO3/SiO2 catalysts with different MoO3 loadings (1-20 mol\%) were prepared by sol-gel technique and characterized using different characterization techniques. XRD analysis revealed the amorphous nature of the catalyst up to 10-mol\% MoO3 loading and formation of alpha-MoO3 crystalline phase on amorphous high surface area mesoporous silica support at higher MoO3 loading. Maximum conversion and selectivity has been obtained with slower addition of nitric acid and simultaneous azeotropic removal of water formed during the reaction. (c) 2006 Elsevier B.V. All rights reserved.

}, keywords = {cumene, nitration, ring nitration, side chain nitration, solid acid catalyst}, issn = {1566-7367}, doi = {10.1016/j.catcom.2005.12.022}, author = {Mathew, Sanyo M. and Biradar, Ankush V. and Shubhangi B. Umbarkar and Dongare, Mohan K.} } @article { ISI:000264521700002, title = {Selective synthesis of cumene by isopropylation of benzene using catalytic membrane reactor}, journal = {Chemical Engineering Journal}, volume = {147}, number = {2-3}, year = {2009}, month = {APR}, pages = {97-101}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

Selective isopropylation of benzene to cumene is demonstrated using catalytic membrane reactor (CMR), to our knowledge for the first time and the performance was evaluated against conventional plug flow reactor (PFR). Almost complete elimination of byproducts like polyalkylated benzene and higher aromatics could be made possible by using CMR. These are present in significant amount when reaction is carried out with PFR. The cumene selectivity increased up to a maximum of 97.25\% by CMR as against 90.05\% with conventional PFR. The effect of reaction parameters that can greatly influence the process economics, such as liquid hourly space velocity (LHSV), reactant mole ratio and catalyst/reactor volume ratio were investigated. Changes in these parameters made for CMR are industrially advantageous. The process by CMR is more economical and ecofriendly than PFR as far as milder process parameters (higher LHSV, lower reactant feed mole ratio, less catalyst require, etc.) and process intensification (reaction and separation in single reactor) are concerned. The study provides new insights for benzene isopropylation reaction. (C) 2008 Elsevier B.V. All rights reserved.

}, keywords = {Benzene, Catalytic membrane reactor, cumene, Diisopropyl benzene, Friedel-Craft alkylation}, issn = {1385-8947}, doi = {10.1016/j.cej.2008.06.035}, author = {Bokade, Vijay V. and Kharul, Ulhas K.} } @article { ISI:000307209400005, title = {Alkylation of benzene to cumene over mor zeolite catalysts}, journal = {Revue Roumaine De Chimie}, volume = {57}, number = {2}, year = {2012}, month = {FEB}, pages = {107-113}, publisher = {EDITURA ACAD ROMANE}, address = {CALEA 13 SEPTEMBRIE NR 13, SECTOR 5, BUCURESTI 050711, ROMANIA}, abstract = {

The vapor phase alkylation of benzene to cumene (isopropyl benzene) is studied over MOR (mordenite) type zeolite at different process parameters. The reaction was also studied by adopting different methodologies (pyridine poisoning, passing of moist propylene, alkali dominant mordenite, use of coked catalyst and metal impregnated zeolite) to check the nature of product distribution and the extent of activity and selectivity to alkylated product IPB, DIPB (isopropyl benzene and diisopropyl benzene) and n-PB (n-propyl benzene). It is revealed that the adoption of different methodologies affects the activity and selectivity significantly by suppressing of alkylation / isomerisation reactions.

}, keywords = {Alkylation, cumene, isopropanol, MOR zeolite, propylene}, issn = {0035-3930}, author = {Vyawahare, Yogesh K. and Chumbhale, Vilas R. and Aswar, Anand S.} }