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1976 (2)
1Author    FriedrichFranz SeeligRequires cookie*
 Title    Effects in the Hydroformylation Process  
 Abstract    The complicated and partially controversial formulations of the various steps and branchings in the hydroformylation process are comprised in a reaction scheme that ne-glects the production of different isomers and isomerisations of olefins and is a compromise between the given complexity and a theoretical tractability. Special consideration is devoted to the inhibition of the process by one of its substrates, CO. In a first approxima-tion complete inertness of the Co-tetracarbonyls is assumed and the existence of bistability and hysteresis for particular parameter combinations is proved. In the further treatment this approximation is again relaxed. Technological consequences of the analysis are discussed. 
  Reference    (Z. Naturforsch. 31b, 336—341 [1976]; received October 21 1975) 
  Published    1976 
  Keywords    Hydroformylation, Oxo-synthesis, System Theory, Stability Analysis, Hysteresis 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0336.pdf 
 Identifier    ZNB-1976-31b-0336 
 Volume    31 
2Author    FriedrichFranz SeeligRequires cookie*
 Title    System-theoretical Investigation of Possible Oscillatory States in the Hydroformylation Process in an Open Isothermal System Hydroformylation  
 Abstract    The kinetic model for the hydroformylation process as given in a previous paper (SEELIG 1) is extended in as far as the concentrations of all three substrates (olefin, H2, CO) are allowed to move freely, whilst in the first investigation this was the case only for CO, the concentrations of olefin and H2 being kept constant. So the derived hysteresis loop of [CO] vs influx of CO is shifted back and forth by the varying [olefin] and [H2], causing oscillations for particular combinations of the parameters. These oscillations are due to the substrate inhibition by CO and are not the result of instabilities of some external control circuit; so they would occur even in a perfectly isothermal open system. 
  Reference    (Z. Naturforsch. 31b, 929—934 [1976]; received March 5 1976) 
  Published    1976 
  Keywords    Oxo-synthesis, System Theory, Stability Analysis, Oscillation, Substrate Inhibition 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0929.pdf 
 Identifier    ZNB-1976-31b-0929 
 Volume    31