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Liquid Phase Isobutane/2-Butene Alkylation Promoted by Hydrogen Chloride Using Lewis Acidic Ionic Liquids

Title data

Pöhlmann, Ferdinand ; Schilder, Lisa ; Korth, Wolfgang ; Jess, Andreas:
Liquid Phase Isobutane/2-Butene Alkylation Promoted by Hydrogen Chloride Using Lewis Acidic Ionic Liquids.
In: ChemPlusChem. Vol. 78 (2013) Issue 6 . - pp. 570-577.
ISSN 2192-6506
DOI: https://doi.org/10.1002/cplu.201300035

Official URL: Volltext

Abstract in another language

In isobutane/2-butene alkylation, chloroaluminate ionic liquid catalysts (CAIL) deactivate fast with time on stream with respect to activity and selectivity. Hence, the effect of anhydrous hydrogen chloride (HCl), which shows co-catalytic behavior, was studied in a batch reactor and its effect on both parameters was investigated. The co-catalyst leads to an increased reaction rate and improves the yield of trimethylpentanes, the primarily desired high-octane compounds of alkylation. Moreover, already deactivated CAIL catalysts are reactivated by gaseous HCl. In addition saturation of the ionic liquid with HCl prior to the reaction effectively suppresses the deactivation of the CAIL catalyst. Thus, the solubility of hydrochloric acid is reported for both the CAIL (IL: [BMIM]Cl/AlCl3, x AlCl 3=0.64) and organic phase to gain a deeper understanding of the reaction system. Finally conjunct polymers dissolved in the ionic liquid were extracted to study their influence on deactivation.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: alkylation
deactivation
hydrogen chloride
ionic liquids
solubility
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Research Institutions > Research Units > ZET - Zentrum für Energietechnik
Research Institutions
Research Institutions > Research Units
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 21 Jan 2015 15:17
Last Modified: 17 May 2017 07:23
URI: https://eref.uni-bayreuth.de/id/eprint/5729