VERFAHREN ZUM HYDRIEREN

摘要

The invention relates to a process for hydrogenating native fats, oils and fatty derivatives like fatty acids and fatty acid esters to form fatty alcohols in fixed-bed reactors, especially with constant flow, in which hydrogen is passed through the circuit in stoichiometric excess, especially to the extent of 10 to 100-fold and the fat, oil or fatty derivative passes through the reactor only once. To reduce the specific hydrogen consumption without substantial penalties relating to the specific reactor load, product selectivity and catalyst life, it is proposed that the hydrogen is taken through at least two fixed-bed reactors (4, 10) in succession without allowing the gas leaving the reactors (4), and entering the subsequent reactors (10) to cool and that the fat, oil or fatty derivative is fed in parallel into the reactors (4, 10).