Bronsted acid-functionalized choline chloride-butane sultone for the catalytic decomposition of cumene hydroperoxide to phenol

Choline chloride and 1,4-butane sultone were combined to obtain a sulphonic acid-functionalized ionic liquid. The structural properties of the ionic liquid were evaluated with AT-IR, NMR, mass and elemental analysis. The Bronsted acidity of the ionic liquid was confirmed from the AT-IR analysis of p...

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Bibliographic Details
Published in:Journal of chemical sciences (Bangalore, India) India), 2018-04, Vol.130 (4), p.1-7, Article 36
Main Authors: Padma priya, M P, Rajarajeswari, G R
Format: Article
Language:English
Subjects:
Catalysis
Catalytic activity
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Chloride
Choline
Conversion
Cumene
Cumene hydroperoxide
Environmental impact
Infrared radiation
Ionic liquids
Ions
Miscibility
NMR
Nuclear magnetic resonance
Phenols
Process parameters
Reaction kinetics
Recyclability
Regular Article
Solvents
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Summary:Choline chloride and 1,4-butane sultone were combined to obtain a sulphonic acid-functionalized ionic liquid. The structural properties of the ionic liquid were evaluated with AT-IR, NMR, mass and elemental analysis. The Bronsted acidity of the ionic liquid was confirmed from the AT-IR analysis of pyridine-adsorbed samples. The catalytic activity of the ionic liquid was studied for the preparation of phenol from cumene hydroperoxide by Hock process. Various reaction parameters were optimized and kinetics of the reaction was evaluated. This Bronsted acidic choline chloride-butane sultone-based ionic liquid was highly selective towards the conversion of cumene hydroperoxide to phenol. Ease of use and recovery, low environmental impact, and effective reduction of activation energy make it a potential candidate for industrial production of phenol. Graphical Abstract Synthesis of a Bronsted acid ionic liquid based on choline chloride and 1,4-butane sultone was described. This ionic liquid was selective in the conversion of cumene hydroperoxide to phenol. Simple synthetic procedure, immiscibility with reaction mixture, recyclability are the added advantages of this ionic liquid.
ISSN:0974-3626
0973-7103
DOI:10.1007/s12039-018-1445-0