Supported metal interaction catalysts

Details Supported metal interaction catalysts Supported metal interaction catalysts

1977-02-23

1979-04-17

Shine, W. J.

Compositions

X-ray or neutron shield

252461, 252472, B01J 2358, B01J 2364, B01J 2378, B01J 2384

Patent

active

041499980

ABSTRACT:
This invention relates to a class of heterogeneous catalysts. More particularly, it pertains to catalysts consisting of group VIII metals dispersed on oxide carriers selected from the group consisting of Ti, V, Nb and Ta and mixtures thereof, and zirconium titanate and BaTiO.sub.3, it having been discovered that these oxide carriers are capable of exerting remarkable effects on the properties of the Group VIII metals so dispersed. Among the strong effects on the properties of supported Group VIII metals which these carriers have been observed to bring about are the suppression of the capacity of the Group VIII metals to chemisorb hydrogen at room temperature, the suppression of the capacity of the Group VIII metals to chemisorb carbon monoxide at room temperature and profound alterations in the activity and/or selectivity of various Group VIII metals in reactions such as the dehydrocyclization of n-heptane and the hydrogenolysis of ethane.
These catalyst compositions which exhibit suppression of H.sub.2 and CO chemisorption are prepared by methods known in the art, but differ from the prior art methods in that reduction in a hydrogen or other reducing gas atmosphere at a temperature sufficient to result in a catalyst possessing the desired characteristics is a necessary step.

REFERENCES:
patent: 3180820 (1965-04-01), Gleim et al.
patent: 3262874 (1966-07-01), Gatsis
patent: 3278421 (1966-10-01), Gatsis
patent: 3385670 (1968-05-01), Van Hook et al.
patent: 3579569 (1971-05-01), Montgomery et al.
patent: 3784675 (1974-01-01), Kobylinski et al.
patent: 3922235 (1975-11-01), DeLuca et al.
Dollimore et al., "Energetic Nature of Catalyst Surface," J. of Catalysis 28, 275-281 (1973).

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