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Continuous, Ionic Liquid‐Catalysed Propylation of Toluene in a Liquid‐Liquid Biphasic Reaction Mode using a Loop Reactor Concept
Author(s) -
Ladnak Viktor,
Hofmann Norbert,
Brausch Nicole,
Wasserscheid Peter
Publication year - 2007
Publication title -
advanced synthesis and catalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.541
H-Index - 155
eISSN - 1615-4169
pISSN - 1615-4150
DOI - 10.1002/adsc.200600414
Subject(s) - ionic liquid , chemistry , toluene , selectivity , imide , catalysis , ion , inorganic chemistry , organic chemistry
Acidic ionic liquids of the type [cation] [bis(trifluoromethanesulfonyl)imide anion]/aluminium trichloride {[cation][(CF 3 SO 2 ) 2 N]/AlCl 3 } have been applied to realise for the first time a continuous Friedel–Crafts alkylation reaction in liquid‐liquid biphasic reaction mode using a loop reactor concept. Exemplified for the continuous propylation of toluene we have proved that the acidic catalyst layer is successfully immobilised over at least 18 h in the loop reactor. After 8 h time‐on‐stream, a steady state has been reached followed by at least 10 h time‐on‐stream without any loss of activity or change in selectivity. Our results reveal the high potential of this class of acidic ionic liquids in continuous arene functionalisation reactions.