| 摘要 |
1,197,902. Oxo process. BRITISH PETROLEUM CO. Ltd. 28 March, 1968 [5 April, 1967], No. 15534/67. Heading C2C. Aldehydes are prepared by the hydroformylation of olefins with substantially no simultaneous formation of alcohols by a process which comprises hydroformylating an olefin with carbon monoxide and hydrogen at elevated temperature and at a pressure less than 200 p.s.i.g. and in the presence as catalyst of more than 1 mole of a square planar complex of monovalent rhodium containing a carboxylate ligand per 3600 moles of feed. Suitable complexing ligands contain a Group Vb or VIb donor atom and tertiary phosphines are preferred. A catalytic quantity of a carboxylic acid may be present to assist the stability of the catalyst on recycle. Preferred carboxylate ligands are those derived from aliphatic carboxylic acids containing less than 20 carbon atoms such as acetic, propionic and the butyric acids which are used in the examples together with the phthalate, cinnamate and p-fluoro benzoate ligands. Suitable olefin feeds have between 2 and 20 carbon atoms per molecule and in the examples those used are hexene-1, heptene-1 and octene-1. The preferred temperature range is 40‹ C. to 200‹ C. and the hydrogen to carbon monoxide molar ratio may be between 4: 1 and 1:4. In the examples hexane, heptane and octane, the hydrocarbons corresponding to the olefins are formed in small amounts and in Examples 1 and 3 hexan-1-ol and hexan-2-ol are formed. |
