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US 5,315,040 AGranted
Production of aromatic amines
AssigneeSumitomo Chemical Company, Limited
InventorsKotohiro Nomura, Masaru Ishino
Life of this patent
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Abstract
Aminoanthraquinones which are materials for dyes are prepared by allowing nitroanthraquinones to react with carbon monoxide and water in a liquid phase in the presence of a homogeneous catalyst comprising rhodium compounds or ruthenium compounds and solvents therefor.
Claims8
A process for preparing aromatic amine compounds which comprises reacting aromatic nitro compounds excluding nitroanthraquinones with carbon monoxide and water in the presence of a homogeneous catalyst comprising ruthenium compounds and solvents therefor as well as amines having the formula (II)
- HNR.sup.4 R.sup.5 II
- wherein R.sup.4 and R.sup.5 each is a hydrogen atom, an alkyl group, a cycloalkyl group, an aralkyl group or an aryl group but both R.sup.4 and R.sup.5 are not hydrogen atoms, and R.sup.4 and R.sup.5 may together form a ring and wherein said alkyl group, said cycloalkyl group and said aryl group may have substituents selected from the group consisting of an alkyl group, a halogen atom and an alkoxy group.
Dependencies are inferred from the claim text.