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Influence of acidity of modified chloroaluminate based ionic liquid catalysts on alkylation of iso-butene with butene-2

Titelangaben

Bui, Thi Le Thuy ; Korth, Wolfgang ; Jess, Andreas:
Influence of acidity of modified chloroaluminate based ionic liquid catalysts on alkylation of iso-butene with butene-2.
In: Catalysis Communications. Bd. 25 (2012) . - S. 118-124.
ISSN 1566-7367
DOI: https://doi.org/10.1016/j.catcom.2012.03.018

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

In the present work, aluminium chloride based ionic liquids (ILs) were used as catalysts for alkylation of iso-butane with butene-2. Some additives such as, transition metal salts, water and acidic cation exchange resins were used to improve the selectivity of the main products and the yield of reaction. A high content of the desired trimethylpentanes (TMPs) (up to 72.3%) and thus a high research octane number (RON up to 98) of the alkylate were received on using CuCl modified triethylamine hydrochloride aluminium chloride ([Et3NH]Cl/AlCl3) (molar fraction of AlCl3 is 0.6) at − 5 °C over a period of 15 min. The effectiveness of additives is assumed to explain by the formation of Brønsted acid or complexes which exhibit the Brønsted acidity or superacidity. The acidity of investigated catalytic systems was evaluated by FT-IR and confirmed that. The Brønsted and Lewis acidic sites were detected by FT-IR. The Lewis acidity can be adjusted mainly by mol fraction of AlCl3 while the Brønsted acidity can be increased by using the suitable amounts of additives. This is a valuable guide to explain the mechanism and to select the catalysts for alkylation.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Alkylation
Ionic liquids
Acid cation exchange resins
Metal transition salts
Acidity
FT-IR
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Chemische Verfahrenstechnik > Lehrstuhl Chemische Verfahrenstechnik - Univ.-Prof. Dr.-Ing. Andreas Jess
Fakultäten
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 660 Chemische Verfahrenstechnik
Eingestellt am: 22 Jan 2015 06:48
Letzte Änderung: 22 Jan 2015 06:48
URI: https://eref.uni-bayreuth.de/id/eprint/5741