Noble metal on rare earth modified silica alumina as hydrocarbon conversion catalyst
AssigneeExxon Research & Engineering Co.
InventorsStuart L. Soled, Gary B. McVicker, William E. Gates
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Abstract
Rare earth oxides, such as Nd.sub.2 O.sub.3 disperse onto the surface of SiO.sub.2 /Al.sub.2 O.sub.3 and act as weakly basic titrants. This lowers the acidity of SiO.sub.2 /Al.sub.2 O.sub.3 to close to that of chlorided alumina, as shown by model compound reaction tests. This support also disperses a noble metal such as Pt much better than undoped SiO.sub.2 /Al.sub.2 O.sub.3 and similar to chlorided alumina. Platinum on the rare earth modified silica alumina can function as a hydrocarbon conversion catalyst in reactions where Pt/chlorided Al.sub.2 O.sub.3 is used, such as in reforming, and isomerization, especially wax isomerization.
Claims8
A catalyst composition comprising an amorphous silica-alumina support having at least about 50 wt% silica, a rare earth oxide, and metal(s) selected from the group consisting of Group VIII noble metal(s), mixtures of Group VIII noble metal(s) and rhenium and mixtures of Group VIII noble metal(s) and tin.
Dependencies are inferred from the claim text.