Selective Hydroformylation of Mixed Feedstocks

  • Author: ChemViews
  • Published Date: 12 April 2011
  • Source / Publisher: Angewandte Chemie International Edition/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
thumbnail image: Selective Hydroformylation of Mixed Feedstocks

Hydroformylation is one of the largest applications of homogeneous catalysis in industry. Immobilization of the catalyst would facilitate the isolation of the products. To this end, the continuous gas-phase hydroformylation of pure 1-alkene feedstocks has been developed with a catalyst dispersed in a thin film of ionic liquid physisorbed on the surface of a porous solid.

Peter Wasserscheid and colleagues, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, have now extended this concept to an industrial mixed C4 feedstock by including highly active and selective diphosphite ligands.
CO and H2 are selectively added to 1-butene, but 2-butenes and the large quantity of isobutene (43.1 % of the feedstock mixture) remain untouched. This gives a remarkable selectivity of 99 % n-pentanal. The catalyst is stable for more than 800 h on stream making it relevant for industrial use.

Image: A selection of the supported catalysts developed. (c) Wiley-VCH

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