Collaborative Research Center/Transregio 63
"Integrated Chemical Processes in Liquid Multiphase Systems"
Sub-Coordinators: Prof. Dr. Dieter Vogt, Prof. Dr. Reinhard Schomäcker
Researchers: M.Sc. Bachir Bibouche, Dr. Daniel Peral, M.Sc. Johannes Wunderlich
Latex nanoparticle microemulsions have been used as phase transfer agents in multiphasic hydroformylation reactions. Water-soluble rhodium catalysts can be used in these aqueous latex microemulsions because the higher alkenes dissolve in the hydrophobic core of the polymer nanoparticles. Product separation and recycling processes can be easily performed by simple phase separation and addition of fresh substrate. Hydroformylation of 1-octene catalysed by a rhodium trisulfonated triphenylphosphine (TPPTS) complex in aqueous latex microemulsion medium has been carried out with success.
Figure 1. Multiphasic Hydroformylation Process
The aim of this project is the development of multiphasic hydroformylation processes of higher alkenes based on latex microemulsions. For this purpose, the development of new temperature and shear-resistant lattices in order to avoid coagulation under catalytic conditions is a key factor in the project. The influence of all relevant reaction parameters in the microemulsion polymerization reaction will be studied and optimized. Of specific interest are the phase behavior of these multiphasic systems and the recovery and recycling of the catalyst in the hydroformylation reactions. Reaction conditions and ligands will be also tested in order to achieve high active and recyclable systems.
Figure 2. Synthesis and structure of Latex Nanoparticles
Peral, D.; Stehl, D.; Bibouche, B.; Yu, H.; Mardoukh, J.; Schomacker, R.; von Klitzing, R.; Vogt, D. Colloidal polymer particles as catalyst carriers and phase transfer agents in multiphasic hydroformylation reactions. J. Colloid Interface Sci., 513, 647-657. 2018. [doi.org/10.1016/j.jcis.2017.11.071]