Verfahren zur Herstellung von Aldehyden

摘要

The invention relates to the hydroformylation of olefins or of olefinically unsaturated compounds in the presence of an organic solution which serves as a catalyst and which contains at least one rhodium compound and at least one phosphine-substituted cobalticinium salt. The inventive method is characterised in that phosphine-substituted cobalticinium salts of general formula (I), wherein R<1> is the same or varies and is hydrogen or various substituents, are used. An aqueous solution of 1, 1'-bis(diphenylphosphino)-cobalticinium nitrate and a rhodium compound is suitable as a hydroformylation catalyst in a two phase process.