Rhodium catalysts, process for their preparation and process for

Details Rhodium catalysts, process for their preparation and process for Rhodium catalysts, process for their preparation and process for

1989-01-09

1990-02-20

Sneed, H. M. S.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Inorganic carbon containing

502218, 502243, 502313, 502330, 564 45, 564462, B01J 2118, B01J 27053, B01J 2000

Patent

active

049026615

ABSTRACT:
Diphenylamine which is unsubstituted or substituted by alkyl or alkoxy groups can be prepared by treating appropriately substituted dicyclohexylamine with 1-10 bar of H.sub.2 over catalysts containing 0.05-5% by weight of rhodium at 250.degree.-450.degree. C. In addition to rhodium, the catalysts contain at least one other platinum metal from the group consisting of palladium, platinum and iridium on a support containing the noble metals in a total amount of 0.05-5% by weight, the percentage by weight of rodium with respect to all noble metals being 10-90%, and furthermore containing additives of 1-6% by weight of an alkali metal hydroxide and 1-6% by weight of an alkali metal sulphate. All percentages are based on the total weight of the catalyst.

REFERENCES:
patent: 4057581 (1977-11-01), Krall et al.

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