@article {40}, title = {Toluene alkylation with methanol to p-xylene over heteropoly acids supported by clay}, journal = {Journal of Natural Gas Chemistry}, volume = {16}, number = {1}, year = {2007}, month = {MAR}, pages = {42-45}, publisher = {ELSEVIER SCIENCE BV}, type = {Article}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

{The alkylation of toluene with methanol for the selective formation of p-xylene was systematically studied. Very few studies have been reported on the use of superacids such as heteropolyacids on cheap supports, such as clay. This article deals with the use of different heteropoly acids (HPAs), viz, Dodeca-Tungstophosphoric acid [

}, keywords = {co-crystalline, p-xylene, toluene alkylation, ZSM-12, ZSM-5}, issn = {1003-9953}, doi = {10.1016/S1003-9953(07)60024-3}, author = {Bokade, Vijay V. and Deshpande, Suvarna S. and Patil, R. and Jain, S. and Yadav, G. D.} } @article {46827, title = {Catalytic conversion of HMF into ethyl levulinate - a biofuel over hierarchical zeolites}, journal = {Catalysis Communications}, volume = {140}, year = {2020}, month = {JUN}, pages = {105998}, type = {Article}, abstract = {

Catalytic conversion of 5-hydroxymethyl-2-furfuraldehyde (HMF, a biomass-derived platform chemical) into ethyl levulinate (EL) is an attractive approach for producing renewable transport fuels for mitigating global warming. We report here the application of hierarchical zeolites (DZSM-5 and MZSM-5 synthesized by desilication and mesoporous templating approaches, respectively) as solid acid catalysts for this transformation. Hierarchical structure of these zeolites was confirmed by X-ray diffraction, nitrogen-physisorption and electron microscopy, and acidity was determined by temperature-programmed desorption of ammonia. HMF conversion of 94.2\% with EL selectivity of 90.8\% was achieved over the MZSM-5 catalyst. Acidity, pore size and surface properties affected the catalytic activity.

}, keywords = {5-Hydroxymethyl-2-furfuraldehyde (HMF), Biofuel, ethyl levulinate, Hierarchical zeolite, ZSM-5}, issn = {1566-7367}, doi = {10.1016/j.catcom.2020.105998}, author = {Chithra, P. A. and Darbha, Srinivas} } @article {47071, title = {Effect of rice husk particle size on ZSM-5 physico-chemical properties for selective formation of 1,3,5-trimethyl-2-benzylbenzene (Pharmaceutical Intermediate)}, journal = {ChemistrySelect}, volume = {6}, year = {2021}, month = {FEB }, pages = {1255-1262}, type = {Article}, abstract = {

Rice husk, rich in silica and abundantly available as waste, is presently destroyed by burning, which creates environmental issues. Thus, it will be advantageous if this rice husk waste can be used for preparation of valuable products. One of the application is its use as silica source in the synthesis of zeolites like ZSM-5, which are silico-aluminates. Rice husk waste is available in wide range of particle sizes in agricultural farms. There is no study available in open literature on use of these wide particle ranges for its direct application. This paper is an attempt to use wide particle size rice husk, its effect on ZSM-5 synthesis and its physico-chemical properties. Further these prepared ZSM-5 catalyst was evaluated for benzylation of mesitylene reaction. The study found that, rice husk of 600 mu m particle size is optimum as far as ZSM-5 synthesis, its physicochemical properties and further its application in mesitylene benzylation reaction.

}, keywords = {Mesitylene, Particle size, rice husk, Silica Source, ZSM-5}, issn = {2365-6549}, doi = {10.1002/slct.202004802}, author = {Ghuge, Gorakh and Niphadkar, Prashant and Rathod, Simmy and Bokade, Vijay V.} }