Maleic anhydride (MA) is first reacted with 1,4-butanediol in a molar ratio of 1,4-butanediol:MA=1.1-2:1 to give an oligoester which is subsequently hydrogenated with excess hydrogen at 100-400 bar in two hydrogenation steps to give 1,4-butanediol. The first hydrogenation step is carried out at 60.degree.-130.degree. C. over a support-free catalyst of compacted metal powder of Ni, Fe, Co or mixtures thereof; the second hydrogenation step is carried out at 190.degree.-230.degree. C. over a reduced, support-free catalyst of compacted powders of copper oxides, ZnO and Al.sub.2 O.sub.3 containing proportions of oxides of Ni, Fe, Co or mixtures of a plurality thereof. A temperature difference of 60.degree.-130.degree. C. is set between the two hydrogenation steps.
首先,将
马来酸酐(MA)与
1,4-丁二醇以摩尔比
1,4-丁二醇:MA = 1.1-2:1反应,得到寡
酯类,然后在两个氢化步骤中使用过量氢在100-400巴的压力下进行氢化,得到
1,4-丁二醇。第一步氢化反应在60℃-130℃的温度下进行,使用无支撑催化剂,催化剂为紧密压缩的Ni,Fe,Co或其混合物
金属粉末;第二步氢化反应在190℃-230℃的温度下进行,使用经还原的无支撑催化剂,催化剂为紧密压缩的
氧化铜、ZnO和
Al2O3的粉末,其中含有Ni、Fe、Co或其混合物的氧化物比例。两个氢化步骤之间设置60℃-130℃的温度差。