| 摘要 |
PURPOSE:To improve the yield of the titled compound, without causing the problems such as environmental pollution, lowering of catalytic activity, etc., in the preparation of the titled compound by the hydrogenation of an unsaturated aldehyde, unsaturated fatty acid, etc., by using a composite catalyst having a specific composition and obtained from iron sulfate. CONSTITUTION:The objective compound can be prepared by hydrogenating an unsaturated aldehyde, unsaturated fatty acid or its ester in the presence of a composite catayst containing iron oxide and zinc oxide at an atomic ratio (Fe: Zn) of 9:1-8:2 and obtained from iron sulfate. The catalyst can be prepared, e.g. by adding a precipitant to a mixed aqueous solution of iron sulfate and a zinc salt, and drying and calcining the resultant coprecipitate. The pH of the system in the coprecipitation process is adjusted to 7.0-11.0, preferably 8.0- 9.0. the temperature for the pyrolysis of the precipitate to oxides is 300-800 deg.C, preferably 350-500 deg.C. |
