Continuous catalytic Friedel–Crafts acylation in the biphasic medium of an ionic liquid and supercritical carbon dioxide
… A range of early transition metal triflates and lanthanide salts have been shown as
promising FCA catalysts, 4 most recently in combination with ionic liquids (ILs) as solvents.
Nonetheless, the majority of previous examples either need a stoichiometric co-catalyst for
their application or are carried out in organic solvents, rendering recycling and continuous
operation difficult. … Previously, due to ion exchange between the IL and the zeolite,
forming an active homogeneous catalyst, rapid deactivation of zeolite catalysts in a …
promising FCA catalysts, 4 most recently in combination with ionic liquids (ILs) as solvents.
Nonetheless, the majority of previous examples either need a stoichiometric co-catalyst for
their application or are carried out in organic solvents, rendering recycling and continuous
operation difficult. … Previously, due to ion exchange between the IL and the zeolite,
forming an active homogeneous catalyst, rapid deactivation of zeolite catalysts in a …
Immobilisation of catalytically-active metal salts in ionic liquids, with extraction by supercritical carbon dioxide, affords continuous Friedel–Crafts acylation, with in situ-recycling of the catalyst.
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