An improved process for selective liquid-phase air oxidation of toluene

• Published in: Catalysis letters Vol. 81; no. 3-4; pp. 223 - 232
• Main Authors: MANNEPALLI LAKSHMI KANTAM, SREEKANTH, Pentlavalli, KOTTAPALLI KOTESWARA RAO, THELLA PRATHAP KUMAR, RAO, Bhavnari Puma C, BOYAPATI MANORANJAN CHOUDARY
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01.08.2002; Springer Nature B.V
• Subjects: Benzaldehyde; Benzyl alcohol; Catalysis; Catalysts; Catalytic reactions; Chemistry; Corrosion products; Economic conditions; Exact sciences and technology; General and physical chemistry; Liquid phases; Low concentrations; Organic chemistry; Oxidation; Recyclability; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Toluene; Mixed catalyst; Catalytic reaction; Hydrocarbon; Catalyst selectivity; Toluene; Benzaldehyde; Zinc bromide; Organic ligand; Transition metal Complexes; Acetate; Benzyl alcohol; Sodium bromide; Aldehyde; Cobalt complex; Experimental study; Manganese complex; Primary alcohol; Homogeneous catalysis; Benzenic compound; Oxidation; Recycling
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1023/A:1016537325179

An improved process for the oxidation of toluene to obtain benzaldehyde and benzyl alcohol with high selectivities using a Co/Mn/Br− composite catalytic system in liquid phase is described. A protocol for recovery and reuse of the composite catalyst is developed. The use of low concentrations of composite catalytic systems aimed at minimizing corrosion of the reaction, and higher concentrations of toluene affording higher productivity and recyclability of the catalyst giving high turnover number, are the remarkable achievements of the present methodology. Investigation into the recycle, aging and spectroscopic studies of the catalytic system improves the understanding of the process, chemistry and mechanism of the reaction. As the market demand for each product fluctuates, the dynamic system developed here to meet changing demands is very important to obtain one of the products in excess quantities with a change of the ratio of Br−/Cl−.