MEMBRANE CASCADE WITH FALLING SEPARATING TEMPERATURE

摘要

The invention relates to a method for separating a substance mixture with the aid of a membrane cascade having at least two stages, according to which method a substance separation using at least one membrane takes place in each stage, at a separating temperature assigned to the respective stage. The invention also relates to a corresponding membrane cascade, to the use of said membrane cascade for catalyst separation from homogeneously catalysed reaction mixtures and to a method for hydroformylation, in which the catalyst separation takes place by means of a membrane cascade. The invention addresses the problem of specifying a membrane-based method for separating substance mixtures, which manages with the smallest possible membrane area and still fulfils the required separation task and separation output. This problem is solved by the use of a membrane cascade with falling separating temperature.