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Alkylation of toluene with t-butyl alcohol over zeolite catalysts / Hong-jun Dong in Industrial & engineering chemistry research, Vol. 49 N° 5 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2091–2095 Titre : Alkylation of toluene with t-butyl alcohol over zeolite catalysts Type de document : texte imprimé Auteurs : Hong-jun Dong, Auteur ; Shi Li, Auteur Année de publication : 2010 Article en page(s) : pp. 2091–2095 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Alkylation;  Toluene;  t-Butyl  Alcohol;  Zeolite  Catalysts Résumé : Alkylation of toluene with tert-butylalcohol was investigated over three zeolite catalysts (HY, Hβ, and HMCM-22). The acid properties of zeolites were characterized by FT-IR. The fact that the reaction was influenced by the mount of acid was discussed emphatically, and the reaction temperature on conversion of toluene and selectivity for 4-tert-butyl toluene was also studied. The main products have been identified as 4-tert-butyltoluene and 3-tert-butyltoluene. The best result was obtained when temperature was 473 K, the space velocity was 4.0 h−1, and the mole ratio of toluene to tert-butylalcohol was 6. Zeolite HMCM-22, with the highest total acid and the lowest ratio of the total B acid to the total L acid, possessed high activity for toluene conversion and high paraselectivity over the three types of zeolite catalysts. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901080t [article] Alkylation of toluene with t-butyl alcohol over zeolite catalysts [texte imprimé] / Hong-jun Dong, Auteur ; Shi Li, Auteur . - 2010 . - pp. 2091–2095. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2091–2095 Mots-clés : Alkylation;  Toluene;  t-Butyl  Alcohol;  Zeolite  Catalysts Résumé : Alkylation of toluene with tert-butylalcohol was investigated over three zeolite catalysts (HY, Hβ, and HMCM-22). The acid properties of zeolites were characterized by FT-IR. The fact that the reaction was influenced by the mount of acid was discussed emphatically, and the reaction temperature on conversion of toluene and selectivity for 4-tert-butyl toluene was also studied. The main products have been identified as 4-tert-butyltoluene and 3-tert-butyltoluene. The best result was obtained when temperature was 473 K, the space velocity was 4.0 h−1, and the mole ratio of toluene to tert-butylalcohol was 6. Zeolite HMCM-22, with the highest total acid and the lowest ratio of the total B acid to the total L acid, possessed high activity for toluene conversion and high paraselectivity over the three types of zeolite catalysts. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901080t

Study on alkylation of toluene with tert - butanol over La2O3 - modified HY zeolite / Lin-bo Chen in Industrial & engineering chemistry research, Vol. 49 N° 16 (Août 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7234–7238 Titre : Study on alkylation of toluene with tert - butanol over La2O3 - modified HY zeolite Type de document : texte imprimé Auteurs : Lin-bo Chen, Auteur ; Hong-jun Dong, Auteur ; Shi Li, Auteur Année de publication : 2010 Article en page(s) : pp. 7234–7238 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Zeolite  catalysts Résumé : Alkylation of toluene with tert-butanol was investigated over La2O3-modified HY zeolite catalysts in the microfixed bed reactor. The affect factors of conversion of toluene and the selectivity of tert-butyltoluene were studied. The main reaction products have been identified as p-tert-butyltoluene and m-tert-butyltoluene, La2O3 modified HY zeolite catalyst can significantly improve the selectivity of p-tert-butyltoluene. The result showed that 5% La2O3-modified HY zeolite catalyst was catalytic active (32.4% conversion of toluene), with para-selectivity near 82% at 473 K after 8 h. At the same time the catalysts were characterized by the X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. The FT-IR results showed that the modifier could increase the concentration of weak B acid of HY zeolite and obviously improve the selectivity of p-tert-butyltoluene. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100695k [article] Study on alkylation of toluene with tert - butanol over La2O3 - modified HY zeolite [texte imprimé] / Lin-bo Chen, Auteur ; Hong-jun Dong, Auteur ; Shi Li, Auteur . - 2010 . - pp. 7234–7238. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 16 (Août 2010) . - pp. 7234–7238 Mots-clés : Zeolite  catalysts Résumé : Alkylation of toluene with tert-butanol was investigated over La2O3-modified HY zeolite catalysts in the microfixed bed reactor. The affect factors of conversion of toluene and the selectivity of tert-butyltoluene were studied. The main reaction products have been identified as p-tert-butyltoluene and m-tert-butyltoluene, La2O3 modified HY zeolite catalyst can significantly improve the selectivity of p-tert-butyltoluene. The result showed that 5% La2O3-modified HY zeolite catalyst was catalytic active (32.4% conversion of toluene), with para-selectivity near 82% at 473 K after 8 h. At the same time the catalysts were characterized by the X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. The FT-IR results showed that the modifier could increase the concentration of weak B acid of HY zeolite and obviously improve the selectivity of p-tert-butyltoluene. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100695k