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US 6,455,464 B1Granted
Preparation and use of non-chrome catalysts for Cu/Cr catalyst applications
AssigneeEngelhard Corporation
InventorJianping Chen
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AssigneeEngelhard Corporation
InventorJianping Chen
Estimating the term…
A non-chrome, copper-containing catalyst, Cu—Al—O and method of preparing the same are provided wherein the Cu—Al—O catalyst is prepared by the co-precipitation of copper nitrate (Cu(NO3)2) and sodium aluminate (Na2Al2O4) solutions using sodium carbonate (Na2CO3) as a precipitant. the precipitate is filtered, washed to remove excess sodium, and dried. The dried product, to be used in a powder form, is calcined at a preferred temperature of approximately 700 to 900° C. for approximately 1 to 4 hours. The dry powder, to be tableted or extruded, is calcined at a temperature of approximately 400 to 700° C. The activity of the Cu—Al—O catalyst can be promoted in hydrogenolysis applications by the addition of various agents. The Cu—Al—O catalyst can be employed in applications in place of Cu/Cr, or other copper-based catalysts.
A catalyst having a homogeneous bulk composition, the catalyst consisting essentially of oxides of copper and aluminum, less than 60% of the catalyst by weight comprising a spinel structure, the catalyst having less than about 10% leachable copper ions as determined by reacting 100 ml 10% acetic acid with 10 g of powder catalyst for one hour with continuous stirring.
A solid catalyst comprising a compressed homogeneous Cu—Al—O powder substantially free of chromium, the solid catalyst having a bimodal pore size distribution centering around 100 Å and around 500 Å to 2000 Å.
A solid extrudate of a catalyst having a homogeneous bulk composition, the catalyst consisting essentially of oxides of copper and aluminum, the extrudate being substantially free of binder and peptizer.
Dependencies are inferred from the claim text.