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Removal of trace olefins from aromatics over metal-halides-modified clay and its industrial test / Guo-liang Li in Industrial & engineering chemistry research, Vol. 50 N° 11 (Juin 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6646–6649 Titre : Removal of trace olefins from aromatics over metal-halides-modified clay and its industrial test Type de document : texte imprimé Auteurs : Guo-liang Li, Auteur ; Jin-Ning Luan, Auteur ; Xian-song Zeng, Auteur Année de publication : 2011 Article en page(s) : pp 6646–6649 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Olefins  aromatics  Metal  Halides Résumé : Commercial clay modified with metal halides was prepared to remove olefins from aromatics in the laboratory, and its industrial test was conducted. Different amounts of metal-halides-modified clay were made and characterized by XRD and pyridine adsorption followed by FT-IR. The type and nature of active sites in the removal of olefins over the prepared catalysts have been examined. The study of acidic properties of the modified clay revealed that the L acid, especially the weak L acid plays an important role in the reaction. The experimental results revealed that commercial clay modified with metal halides had much better catalytic activity. During Sinopec Qilu company industrial test, modified clay had an effective running time six times as long as that of untreated commercial clay. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2001567 [article] Removal of trace olefins from aromatics over metal-halides-modified clay and its industrial test [texte imprimé] / Guo-liang Li, Auteur ; Jin-Ning Luan, Auteur ; Xian-song Zeng, Auteur . - 2011 . - pp 6646–6649. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 11 (Juin 2011) . - pp 6646–6649 Mots-clés : Olefins  aromatics  Metal  Halides Résumé : Commercial clay modified with metal halides was prepared to remove olefins from aromatics in the laboratory, and its industrial test was conducted. Different amounts of metal-halides-modified clay were made and characterized by XRD and pyridine adsorption followed by FT-IR. The type and nature of active sites in the removal of olefins over the prepared catalysts have been examined. The study of acidic properties of the modified clay revealed that the L acid, especially the weak L acid plays an important role in the reaction. The experimental results revealed that commercial clay modified with metal halides had much better catalytic activity. During Sinopec Qilu company industrial test, modified clay had an effective running time six times as long as that of untreated commercial clay. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2001567

Study on several mesoporous materials catalysts applied to the removal of trace olefins from aromatics and commercial sidestream tests / Chang, Chih-Chen in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10359–10363 Titre : Study on several mesoporous materials catalysts applied to the removal of trace olefins from aromatics and commercial sidestream tests Type de document : texte imprimé Auteurs : Chang, Chih-Chen, Auteur ; Deh-Juan Wu, Auteur ; Xian-song Zeng, Auteur Année de publication : 2010 Article en page(s) : pp. 10359–10363 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Study--Several--Mesoporous--Materials--Catalysts--Applied--Removal  Trace  Olefins--Aromatics--Commercial--Sidestream  Tests Résumé : Deep removal of trace olefins from aromatics using mesoporous materials and modified mesoporous materials was studied with regard to the removal of trace olefins from aromatic hydrocarbons. The mesoporous materials and the modified mesoporous molecular sieve materials were characterized by X-ray diffraction and Fourier transform infrared (FT-IR) spectroscopy. Under the commercial sidestream test, the effects of four types of mesoporous materials, with regard to the removal of olefins from the aromatics, were evaluated. The result showed that the mesoporous materials that had surface areas larger than 300 m2/g and modified with AlCl3 were best, with regard to the effect on the removal of olefins from aromatics. The FT-IR results showed that the modifier could increase the concentration of weak Lewis acid of mesoporous materials and obviously enhance the effect of removing olefins and prolonging the reaction time. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901062c [article] Study on several mesoporous materials catalysts applied to the removal of trace olefins from aromatics and commercial sidestream tests [texte imprimé] / Chang, Chih-Chen, Auteur ; Deh-Juan Wu, Auteur ; Xian-song Zeng, Auteur . - 2010 . - pp. 10359–10363. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10359–10363 Mots-clés : Study--Several--Mesoporous--Materials--Catalysts--Applied--Removal  Trace  Olefins--Aromatics--Commercial--Sidestream  Tests Résumé : Deep removal of trace olefins from aromatics using mesoporous materials and modified mesoporous materials was studied with regard to the removal of trace olefins from aromatic hydrocarbons. The mesoporous materials and the modified mesoporous molecular sieve materials were characterized by X-ray diffraction and Fourier transform infrared (FT-IR) spectroscopy. Under the commercial sidestream test, the effects of four types of mesoporous materials, with regard to the removal of olefins from the aromatics, were evaluated. The result showed that the mesoporous materials that had surface areas larger than 300 m2/g and modified with AlCl3 were best, with regard to the effect on the removal of olefins from aromatics. The FT-IR results showed that the modifier could increase the concentration of weak Lewis acid of mesoporous materials and obviously enhance the effect of removing olefins and prolonging the reaction time. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901062c