Hydroformylation of 1-hexene by soluble and zeolite-supported rhodium species part II |
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| Affiliation: | 1. Instituto de Catálisis y Petroleoquímica, ICP-CSIC, C/Marie Curie 2, 28049, Cantoblanco, Madrid, Spain;2. Institute of Chemistry, University of Campinas, Rua Monteiro Lobato, 270, 13084-861 Campinas, SP, Brazil;3. Laboratory of Crystallography, ETH Zürich, CH-8093 Zürich, Switzerland;1. School of Material Science and Engineering, Shenyang Ligong University, Shenyang 110159, PR China;2. School of Chemistry, The University of Nottingham, Nottingham NG7 2RD, UK;3. Department of Chemistry, Imperial College London, London SW7 2AZ, UK;1. Otto von Guericke University, Institute of Process Engineering, Magdeburg, Germany;2. Max Planck Institute for Dynamics of Complex Technical Systems, Molecular Simulations and Design Group, Sandtorstrasse 1, 39106 Magdeburg, Germany;3. Anhalt University of Applied Sciences, Department of Bioscience and Process Engineering, Köthen, Germany;1. Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore;2. School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, PR China;3. Catalytic Chemistry Division, Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 2268503, Japan;4. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore;1. Discipline of Inorganic Materials and Catalysis, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research (CSIR), G.B. Marg, Bhavnagar 364 002, Gujarat, India;2. KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia;3. R&D Center, Vadodara Manufacturing Division, Reliance Industries Limited, Vadodara, Gujarat, India |
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| Abstract: | The hydroformylation of 1-hexene at 50 and 125°C and 300 psig CO:H2 (1:1) using soluble and zeolite-supported rhodium species is reported. The presence of excess phosphine during homogeneous catalysis in shown to inhibit isomerization of 1-hexene and thus give high normal/branched aldehyde ratios for all levels of conversion. However, the absence of phosphine allows significant isomerization, causing the normal/branched ratio to vary with conversion. The activity of the immobilized catalysts is affected by the type and amount of phosphine. The homogeneous and heterogeneous catalysts can be poisoned by mercaptans, provided an excess of phosphine is not present. The data from the immobilized catalysts suggest that claims of intrazeolitic hydroformylation with rhodium-containing faujasites must be taken with caution. |
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