eprintid: 313
rev_number: 15
eprint_status: archive
userid: 67
dir: disk0/00/00/03/13
datestamp: 2007-03-02 04:00:20
lastmod: 2007-03-04 10:34:27
status_changed: 2007-03-04 10:34:27
type: article
metadata_visibility: show
contact_email: halligudi@cata.ncl.res.in
creators_name: Joseph, Trissa 
creators_name: Suman , Sahoo
creators_name: S.B., Halligudi
title: Br¨onsted acidic ionic liquids: A green, efficient and reusable catalyst system and reaction medium for Fischer esterification
ispublished: pub
subjects: QD
divisions: sch_che
full_text_status: public
abstract: Br¨onsted acidic ionic liquid containing nitrogen-based organic cations 1-methylimidazole and 1-butyl-3-methylimidazolium and inorganic anions of the type BF4−, PF6− and PTSA− has been synthesized in good yields and used as a catalysts and reaction medium for Fischer
esterification of alcohols with acids. These were characterized using FTIR and NMR spectroscopy. Ionic liquids as catalyst afforded good alcohol conversion and excellent ester selectivity. Fischer esterification of acetic acid with benzyl alcohol with different Br¨onsted acidic ionic liquids was carried out. Maximum substrate conversion 100% and product selectivity 100% was observed on using [BMIM]+PTSA− as catalyst over a period of 2 h. The ester was easily separated from the reaction mixture and the ionic liquid was reused four times after
removing water. No significant loss in catalytic activity was observed on recycling. 
date: 2005
date_type: published
publication: Journal of Molecular Catalysis A: Chemical 
volume: 234 
publisher: Elsevier
pagerange: 107-110
refereed: TRUE
citation:   Joseph, Trissa  and Suman , Sahoo and S.B., Halligudi  (2005) Br¨onsted acidic ionic liquids: A green, efficient and reusable catalyst system and reaction medium for Fischer esterification.  Journal of Molecular Catalysis A: Chemical , 234  .   pp. 107-110.      
document_url: http://catalysis.eprints.iitm.ac.in/313/1/75.pdf