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Monatshefte für Chemie / Chemical Monthly

, Volume 107, Issue 5, pp 1153–1165 | Cite as

Study of the mechanism of hydroformylation at industrial reaction conditions

Mechanism of hydroformylation, Part III
  • Naim H. Alemdaroğlu
  • Johannes L. M. Penninger
  • Ernst Oltay
Organische Chemie und Biochemie

Abstract

With a newly developed analytical technique, i.e. high temperature/pressure IR cell coupled to the reactor, it was possible to study the mechanism of hydroformylation at reaction conditions. It has been conclusively found that the hydrogenolysis of the acyl cobalt complex is performed by HCo(CO)4 and not by molecular H2, as proposed byHeck andBreslow.

Therefore the formation of HCo(CO)4 from Co2(CO)8 is an intermediate step in the sequence of hydroformylation reaction steps. The rate of hydroformylation of any of the olefins is smaller than the rate of formation of HCo(CO)4 from Co2(CO)8. The IR spectra reveal that always more than 30% of the cobalt is in the form of HCo(CO)4 under the reaction conditions.

It is found that the formation of HCo(CO)4 from Co2(CO)8 is the slowest and most temperature-dependent step of the hydroformylation reaction. Also the reaction between olefin and HCo(CO)4 is slower than the hydrogenolysis of the acyl complex.

The experiments were carried out under industrial oxo conditions. The diffusional effects were eliminated.

Keywords

Physical Chemistry Analytical Chemistry Cobalt Inorganic Chemistry Organic Chemistry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Naim H. Alemdaroğlu
    • 2
  • Johannes L. M. Penninger
    • 3
  • Ernst Oltay
    • 1
  1. 1.Laboratory for Chemical Technology Twente University of TechnologyEnschedeThe Netherlands
  2. 2.AnkaraTurkey
  3. 3.AKZO Chemie Nederland B.V.AmersfoortThe Netherlands

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