Producing aldol condensates, comprises reacting a carbonyl compound with itself or other carbonyl compound with the exception of the reaction of citral with acetone to pseudoionone

摘要

Producing aldol condensates, comprises reacting carbonyl compound (I) with itself or other carbonyl compound (II) with the exception of the reaction of citral with acetone to pseudoionone, where heterogeneous catalysts on the basis of oxides consists of rare earth metal as unsupported catalysts, or are used as supported catalysts obtained by deposition of the oxides of the rare earth metals on titanium dioxide carrier or zirconium dioxide carrier or on at least partially or completely tetragonal zirconium dioxide carrier and/or mixtures as the carrier material. Producing aldol condensates, comprises reacting carbonyl compound of formula (RCH 2COR1a) (I) with itself or other carbonyl compound of formula (R1bCOR1c) (II) with the exception of the reaction of citral with acetone to pseudoionone, where heterogeneous catalysts on the basis of oxides consists of rare earth metal as unsupported catalysts or are used as supported catalysts obtained by deposition of the oxides of the rare earth metals on titanium dioxide carrier or zirconium dioxide carrier or on at least partially or completely tetragonal zirconium dioxide carrier and/or mixtures as the carrier material. R, R1, R1b, R1c : H, linear or branched alkyl, cycloalkyl, aryl, aralkyl, heterocyclic with N, O or S as hetero atoms or heteroaryl with N, O or S as heteroatoms, where mono-or polysubstituted aryl rings are optionally substituted with linear or branched alkyl, cycloalkyl, hydroxy, alkoxy, phenoxy, carboxy, amino and halo, preferably F or CF 3, where R, R1a, R1b, and R1c form rings (which includes N, O or S) having a carbon-number of 4-12, preferably 5-6.