Hydroformylation of alkyl alkenes catalyzed by rhodium supported on MCM-41: The effect of H3PW12O40 on the catalytic activity and recycling

Heteropolyacids impregnated with rhodium(I) or (III) complexes were prepared and used as supported catalysts in the hydroformylation of alkyl alkenes. Two general types of catalysts were prepared and tested: rhodium(I) or (III) in the presence and in the absence of the heteropolyacid H3PW12O40, 25H2O (adopted as HPW12) supported on MCM-41 (30 Å). 1-Octene was chosen as a model substrate. Different types of supported catalysts were tested in the hydroformylation of 1-octene and other alkyl alkenes. The effects of the temperature and the type of solvent on the reaction were studied. The results showed that the supported catalysts containing the heteropolyacid H3PW12O40, 25H2O (HPW12) along with rhodium(I) or (III) gave higher catalytic activity. In addition, the recycling of the supported catalysts was studied and the results showed again the important effect of the presence of HPW12 on the recycling of the rhodium catalysts.

Graphical abstractHeteropolyacids were impregnated with rhodium(I) or (III) complexes on MCM-41 and used as supported catalysts in the hydroformylation of alkyl alkenes. Two types of catalysts were prepared and tested: MCM-41 supported by rhodium(I) or rhodium(III) in the presence and in the absence of the heteropolyacid H3PW12O40, 25H2O (adopted as HPW12). The supported catalysts were tested in the hydroformylation of 1-octene and other alkyl alkenes. The results showed that the supported catalysts containing the heteropolyacid HPW12 along with rhodium(I) or (III) have higher catalytic activity. The study of recycling of the supported catalyst showed the advantages of the use of HPW12 on the process of recycling of rhodium catalysts. Figure optionsDownload full-size imageDownload as PowerPoint slide