Batchwise and Continuous Nanofiltration of POSS-Tagged Grubbs-Hoveyda-Type Olefin Metathesis Catalysts

• Published in: ChemSusChem Vol. 6; no. 1; pp. 182 - 192
• Main Authors: Kajetanowicz, Anna, Czaban, Justyna, Krishnan, G. Rajesh, Malińska, Maura, Woźniak, Krzysztof, Siddique, Humera, Peeva, Ludmila G., Livingston, Andrew G., Grela, Karol
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01-01-2013; WILEY‐VCH Verlag; Wiley Subscription Services, Inc
• Subjects: Alkenes - chemistry; Catalysis; homogeneous catalysis; membranes; Membranes, Artificial; metathesis; microporous materials; Nanotechnology - instrumentation; Nanotechnology - methods; Organosilicon Compounds - chemistry; ruthenium; Ruthenium - chemistry; Ultrafiltration - instrumentation; Ultrafiltration - methods
• ISSN: 1864-5631; 1864-564X
• DOI: 10.1002/cssc.201200466

New molecular‐weight‐enlarged metathesis catalysts, which bear polyhedral oligomeric silsesquioxane (POSS) tags, were synthesized and characterized. The catalysts can be recovered from the reaction mixture by using nanofiltration techniques and can be reused. It was found that the membranes Starmem 228 and PuraMem 280 successfully separate the catalyst from the post‐reaction mixtures to below 3 ppm. The application of these POSS‐tagged catalysts in a continuous metathesis reaction was also investigated.
Making metathesis plus nanofiltration POSS‐ible: New molecular‐weight‐enlarged metathesis catalysts, which bear polyhedral oligomeric silsesquioxane (POSS) tags, have been synthesized and characterized. The catalysts can be recovered from the reaction mixture by using nanofiltration techniques and can be reused. The membranes Starmem 228 and PuraMem 280 can be used to successfully separate the catalyst from the post‐reaction mixtures.