Sulfate-supported iron oxide, preparation

The formation of Fe2(S04)3 can also be prohibited by the use of other metal oxides. Because molybdenum sulfates are not known, iron-molybdenum mixed oxide absorbents were prepared and tested. Figure 7 shows a H2S absorption curve of P5/2Fel2MolO. The capacity is slightly smaller than observed with iron-molybdenum mixed oxide absorbents supported by silica due to the strong interaction of a part of the active compounds with the phosphate groups. The metal phosphates formed are not active in the absorption of H2S. 

The presence of thallium(0) led to an increase in activity and selectivity of metallic palladium catalysts supported on silica in aldose oxidation reactions. However, silica-supported thallium(0) had no activity by itself (entry 3). ° Similarly, the bimetallic catalyst platinum-thallium/ZSM-5, prepared by impregnation of thallium sulfate and chloroplatinic acid on Zeolite Socony Mobil-5 (ZSM-5), showed greater selectivity in propane aromatisation and almost the same catalytic activity as monometallic thallium/ZSM-5 (entry 4). Similar comparison of vanadium-caesium-copper and vanadium-caesium-copper-thallium catalysts supported on TiOa.SiC demonstrated that addition of thallium improved the catalytic activity in partial oxidation of p-tert-butyltoluene to p-tert-butyl-benzaldehyde (entry The application of solid-supported thallium-based catalysts in different processes includes (a) iron-thallium catalysts in carbon monoxide hydrogenations to form hydrocarbons and alcohols, and catalytic reforming of... 

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