Supported Ionic Liquid Catalysts for the Oxidation of S- and N-Containing Compounds—The Effect of Bronsted Sites and Heteropolyacid Concentration

In this article, a series of effective catalysts based on betaine and sulfuric or phosphomolybdic acids was obtained. These compositions were characterized by various physicochemical methods tested in the oxidation sulfur- nitrogenous-containing compounds H2O2. An increase amount heteropolyacid (HPA) leads to non-linear change acidity, degree removal sulfur-containing correlates with concentration Bronsted acid sites surface. On contrary, pyridine is determined primarily content heteropolyacids catalyst.