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Rhodium catalysts, method for producing them and method for producing diphenylamine using the same
Rhodium catalysts, method for producing them and method for producing diphenylamine using the same
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机译:铑催化剂,其制备方法和使用该催化剂的二苯胺的制备方法
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摘要
Diphenylamine which is unsubstituted or substituted by alkyl or alkoxy groups can be prepared by treating appropriately substituted dicyclohexylamine with 1-10 bar of H2 over catalysts containing 0.05-5% by weight of rhodium at 250 DEG -450 DEG 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.
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