Reduction of Chloronitrobenzenes by Aqueous Ammonium Sulphide: Triphase Catalysis by Anion Exchange Resin. Issue 3 (2nd July 2016)

• Record Type: Journal Article
• Authors: Rao Jeeru, Lakshmana; Pradhan, Narayan C.; Kundu, Gautam
• Is Part Of: Indian chemical engineer. Volume 58:Issue 3(2016)
• Page Start: 279
• Page End: 296
• Publication Date: 2016-07-02
• Subjects: Triphase catalysis -- Hydrogen sulphide -- Anion exchange resin -- Chloronitrobenzenes -- Chloroanilines -- Kinetics; Chemical engineering -- Research -- India -- Periodicals; 660
• DOI: 10.1080/00194506.2015.1044028
• Languages: English
• ISSNs: 0019-4506

Abstract

Abstract: The reduction of chloronitrobenzenes (CNBs) by aqueous ammonium sulphide was carried out using an anion exchange resin (AER) as triphase (Liquid-Liquid-Solid) catalyst. About 66 folds enhancement in rate of reduction of p -chloronitrobenzene was obtained with 20% (W/V) loading of the catalyst. The reactions were observed to be free from mass transfer resistance with apparent activation energies of 9.3, 14.3 and 20.1 kcal/mol for m -chloronitrobenezne ( m -CNB), o -chloronitrobenezne ( o -CNB) and p -chloronitrobenezne ( p -CNB), respectively. The rate of reduction of p -CNB was established to be proportional to the concentration of p -CNB and to the cube of the concentration of sulphide. The triphase catalyst could be reused for four times with insignificant loss in activity.