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OwnerThomas Tacke, Helmfried Krause +3inventors
InventorsThomas Tacke, Helmfried Krause, Hermanus Gerhardus Jozef Lansink Rotgerink, Baoshu Chen, Jason Carson
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Moulded body based on pyrogenically prepared silicon dioxide, having an annular cylindrical form, the cross section of which has a void and wherein the free surface area accounts for from 1.6 to 77% of the total surface area of the cross section. Supported catalyst which contains on a support (moulded body) as the catalytically active components palladium and/or compounds and alkali metal compounds thereof, as well as additionally gold and/or compounds thereof (Pd/alkali metal/Au system) or cadmium and/or compounds thereof (Pd/alkali metal/Cd system) or barium and/or components thereof (Pd/alkali metal/Ba system) or palladium, alkali metal compounds and mixtures of gold and/or cadmium and/or barium. The catalyst is on a support having a channel which passes through it, and the active components exhibit a penetration depth of more than 0.5 mm to 1.5 mm, calculated from the surface of the support material. The supported catalyst are utilized for the production of unsaturated esters from olefins in the gas phase.
A supported catalyst comprising a shaped support containing, as a catalytically active component
A moulded body, comprising an annular cylindrical form, the cross section of which has a void and wherein free surface area of the void accounts for from 1.6 to 77% of total surface area of said moulded body.
A moulded body which is prepared from one or more pyrogenic oxides from the series SiO2, Al2O3 and ZrO2, characterised by an annular cylindrical form, whereof the cross section has a void and wherein free surface area of the void accounts for from 1.6 to 77% of the total surface area of the moulded body.
Dependencies are inferred from the claim text.