| 摘要 |
<p>The invention consists of a process for producing a mixture of esters of aliphatic unsaturated dicarboxylic acids, wherein the acid contains 6 to 12 carbon atoms and the alcohol is a C1-C18 alkanol, a C5-C12 cycloalkanol, or a C7 to C10 arylalkanol, by passing acetylene or methylacetylene into the anhydrous alcohol, at 30 to 120 DEG C., or at most containing 5% water, and simultaneously introducing nickel tetracarbonyl and less than the equivalent amount of nickel of an organic or inorganic non-oxidising acid, and discontinuing the supply of acetylene or methyl acetylene before the alkanol is completely used up. Up to 80% of the nickel tetracarbonyl may be replaced by free carbon monoxide. There may also be added to the reaction mixture ligand field complex formers, a large number of which is specified, a halide, or ligand field complex of copper, iron, cobalt, zinc, cadmium, mercury, tin or bismuth and one or more polymerisation inhibitors. The product may be hydrogenated and/or worked up for free acids. The examples relate to the use of ethanol, isopropanol, isobutanol, cyclohexanol.</p> |
