Liquid phase selective oxidation of diphenylmethane to benzophenone over ternary hydrotalcites with tert-butylhydroperoxide

• Type: Article in International Scientific Journal
• Date: 2009

Authors

Kishore, D (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: Catalysis Communications

Vol. 10

Pages: 1212-1215

ISSN: 1566-7367

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 9 Citations

Other information

Authenticus ID: P-003-ME7

DOI: 10.1016/j.catcom.2009.01.023

Abstract (EN): Selective oxidation of diphenylmethane to benzophenone was carried out over M-MgAl ternary hydrotalcites, where M is Cu, Co or Fe, using tert-butylhydroperoxide (TBHP) as an oxidant. Influence of various reaction parameters, such as reaction temperature, reaction time, substrate: catalyst mass ratio, substrate: oxidant mole ratio and nature of solvent on the activity and selectivity for the desired reaction were evaluated. Among the catalysts studied CuMgAl-13 showed a maximum diphenylmethane conversion of 95% with 100% selectivity towards benzophenone, at 65 degrees C/24 h with TBHP as an oxidant and acetonitrile as a solvent. Redox metal species present in the hydrotalcite structure were thought to be the active centers involved and a reaction mechanism involving free radicals was proposed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4