Synthesis of diphenylmethane from formalin and benzene in a biphasic system with 12-tungstophosphoric acid
Abstract
Heteropoly acids such as H3PW12O40 are exceptionally active catalysts in the synthesis of diphenylmethane from benzene and formalin (aqueous formaldehyde) in a biphasic system and can be recycled simply by drying the aqueous phase at room temperature.