A process for preparing C4 to C13 monohydroxy compounds from a bottom fraction arising in the distillation of a crude mixture of C4 to C13 oxo-process aldehydes from cobalt-catalyzed or rhodium-catalyzed hydroformylation, or in the distillation of a crude mixture of C4 to C13 oxo-process alcohols, which comprises contacting the bottom fraction in the presence of hydrogen with a catalyst comprising copper oxide and aluminum oxide, at a temperature of 150° C. to 300° C. and a pressure of 20 bar to 300 bar and subjecting the resulting crude hydrogenation product to distillation, and the amount of C4 to C13 monohydroxy compounds present in the crude hydrogenation product after the hydrogenation being greater than the amount of C4 to C13 monohydroxy compounds given stoichiometrically from the hydrogenation of the ester and aldehyde compounds present in the bottom fraction, including the C4 to C13 monohydroxy compounds still present in the bottom fraction before the hydrogenation.
一种从
钴催化或
铑催化加氢甲酰化产生的 C4 至 C13 氧化过程醛粗混合物的蒸馏过程中或 C4 至 C13 氧化过程醇粗混合物的蒸馏过程中产生的底馏物中制备 C4 至 C13 单羟基化合物的工艺,该工艺包括在
氢气存在下,在 150 摄氏度至 300 摄氏度的温度和 20 巴至 300 巴的压力下,使底馏物与由
氧化铜和氧化铝组成的催化剂接触,并将得到的粗加氢产物进行蒸馏,加氢后粗加氢产物中的 C4 至 C13 单羟基化合物的含量为 0.1%至 0.2%。和 20 巴至 300 巴的压力下接触,并将得到的粗加氢产物进行蒸馏,加氢后粗加氢产物中存在的 C4 至 C13 单羟基化合物的量大于底馏分中存在的酯和醛化合物加氢后按
化学计量得到的 C4 至 C13 单羟基化合物的量,包括加氢前底馏分中仍存在的 C4 至 C13 单羟基化合物。