Process for preparing alcohols
AssigneeSumitomo Chemical Company, Limited
InventorsTetsuo Takano, Gohu Suzukamo, Masaru Ishino, Kiyoshi Ikimi
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Abstract
An alcohol is produced in a high selectivity with a good yield from the corresponding carboxylic acid by reducing the latter with hydrogen in the presence of a rhenium catalyst in the coexistence of an organic base. An arylacetic acid, which is included in the starting carboxylic acid, can be produced in an excellent yield from the corresponding aryl aldehyde by reacting the latter with carbon monoxide and water in the presence of rhodium or its compound and hydrogen iodide.
Claims12
A process for preparing an alcohol from the corresponding carboxylic acid by reducing said carboxylic acid with hydrogen in the presence of a rhenium catalyst, characterized in that at least one organic base selected from the group consisting of organic amines and organic phosphines is present in the reaction system.
A process for preparing a carboxylic acid of of the formula:
- Ar--CH.sub.2 --COOH wherein Ar is a substituted or unsubstituted, monocyclic or condensed polycyclic, aromatic hydrocarbon group by reacting the corresponding aldehyde of the formula:
- Ar--CHO wherein Ar is as defined above with carbon monoxide and water in the presence of a catalyst system, characterized in that the catalyst system comprises rhodium or its compound with hydrogen iodide, the molar ratio (gram atom ratio) of hydrogen iodide to rhodium or its compound being from 1 to 10.
Dependencies are inferred from the claim text.