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Continuous hydroformylation with phosphine-functionalized polydimethylsiloxane rhodium complexes as nanofilterable homogeneous catalysts

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<mark>Journal publication date</mark>14/10/2015
<mark>Journal</mark>Industrial and Engineering Chemistry Research
Issue number43
Volume54
Number of pages5
Pages (from-to)10656-10660
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Commercially available polydimethylsiloxane (PDMS) was functionalized with phosphine and used to form a Rh complex catalyst. The PDMS-based Rh catalyst complex shows promise as an inexpensive, readily synthesized and nanofilterable homogeneous catalyst for performing continuous hydroformylation. Batch hydroformylation of several substrates including 1-octene, 1-decene, 1-dodecene and styrene showed good activity and selectivity. For 1-octene hydroformylation, the observed catalyst activity with the PDMS-based Rh complex is 2-fold greater compared to that with a conventional Rh-triphenylphosphine complex under similar conditions. Continuous 1-octene hydroformylation for up to 120 h was demonstrated in a membrane nanofiltration system, showing stable conversion (∼60%) and high chemoselectivity (>95%). The total turnover number (TON) after 120 h was approximately 12 000 and the permeate Rh concentration was <2 ppm.