caa a22 4500 606196072 CHVBK 20210128100922.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s10934-015-9914-z doi (NATIONALLICENCE)springer-10.1007/s10934-015-9914-z Diatomite-entrapped hydrosulfate catalysts for the efficient nitration of toluene with nitric acid [Elektronische Daten] [Chuan-Jun Yue, Shan-Shan Yao, Li-Ping Gu] Diatomite-entrapped hydrosulfate catalysts with the enhanced acidity were prepared by impregnation and 20wt% KHSO4/diatomite was selected as a heterogeneous catalyst for the catalytic nitration of toluene. The characterization of the catalyst by X-ray diffraction, Scanning electron microscopy, Brunauer-Emmett-Teller, Fourier-transform infrared spectroscopy and NH3 temperature-programmed desorption technique presented that potassium sulfate could be properly dispersed on the surface of the diatomite, the analysis with back titration showed that the total acidity of the catalyst was 0.85mmol/g, indicating an excellent catalytic activity for the nitration of toluene. The catalyst with outside surface processed by alkali improved the para-selectivity for the nitration of toluene besides the undiminished activity, due to the pore shape of the acidified diatomite to improve the para-selectivity of the nitration process. Under optimal conditions, the catalytic nitration of toluene obtains 88.21% of total yield and 1.87 of para/ortho (p/o) ratio. Springer Science+Business Media New York, 2015 Toluene nationallicence Diatomite nationallicence Immobilization of hydrosulfate nationallicence Catalytic nitration nationallicence Shape-selective catalysis nationallicence Yue Chuan-Jun Department of Chemical Engineering, School of Science, Changzhou Institute of Technology, 213022, Changzhou, People's Republic of China aut Yao Shan-Shan Department of Chemical Engineering, School of Science, Changzhou Institute of Technology, 213022, Changzhou, People's Republic of China aut Gu Li-Ping Department of Chemical Engineering, School of Science, Changzhou Institute of Technology, 213022, Changzhou, People's Republic of China aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/2(2015-04-01), 455-464 1380-2224 22:2<455 2015 22 10934 https://doi.org/10.1007/s10934-015-9914-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9914-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yue Chuan-Jun Department of Chemical Engineering, School of Science, Changzhou Institute of Technology, 213022, Changzhou, People's Republic of China aut NATIONALLICENCE 700 1- Yao Shan-Shan Department of Chemical Engineering, School of Science, Changzhou Institute of Technology, 213022, Changzhou, People's Republic of China aut NATIONALLICENCE 700 1- Gu Li-Ping Department of Chemical Engineering, School of Science, Changzhou Institute of Technology, 213022, Changzhou, People's Republic of China aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/2(2015-04-01), 455-464 1380-2224 22:2<455 2015 22 10934