Method for preparing a group IVB, VB or VIB metal oxide on inorg

Details Method for preparing a group IVB, VB or VIB metal oxide on inorg Method for preparing a group IVB, VB or VIB metal oxide on inorg

1979-10-05

1981-05-26

Dees, Carl F.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252456, 252458, 252457, 252465, 252469, B01J 2320, B01J 2324

Patent

active

042697379

ABSTRACT:
An acid catalyst comprising a catalytic component selected from the group consisting of oxides of tungsten, niobium and mixtures thereof and tungsten or niobium oxides in combination with one or more additional metal oxides selected from the group consisting of tantalum oxide, hafnium oxide, chromium oxide, titanium oxide and zirconium oxide on an inorganic refractory oxide support is prepared by depositing by means known in the art a metal oxide precursor salt on an inorganic refractory metal oxide which is not itself an acid cracking catalyst or by intimately mixing a metal oxide precursor salt with a refractory metal oxide support precursor salt, converting the salt or salts to the respective metal oxides and subjecting the resultant combination to steaming at elevated temperatures prior to use. Catalysts prepared in this manner exhibit enhanced activity and selectivity as compared to conventional acid catalysts. They also exhibit remarkable resistance to coke make.

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patent: 3812196 (1974-05-01), Uchiyama et al.
patent: 3985641 (1976-10-01), Finch et al.

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