Preparation and Properties of Catalysts

Methyl mercaptan production – catalysts and processes

“…A number of activated alumina catalysts in combination with oxides of the alkali and alkaline earth metals, alkali metal carbonates, phosphates, halides, sulfides, and sulfates, as well as the salts of an oxy acid of tungsten, chromium, molybdenum, uranium, and vanadium, were evaluated in this process. 10,[13][14][15][16][17][18][19][20] Yields higher than 90% of methylmercaptan were obtained over Al 2 O 3 -(8-10)% K 2 WO 4 catalysts.…”

Internal Heterogeneity in Catalysts – Methods of Preparation and their Influence on Final Activity and Selectivity

“…Maatman and Prater [5, 61 were the first to consider internal heterogeneity, later mentioned by several authors [7][8][9][10][11]. No study was developed explaining this fact, though it was pointed out that preparation variables should explain these internal heterogeneities.…”