Microencapsulated catalyst, methods of preparation and...

B - Operations – Transporting – 01 – J

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B01J 13/18 (2006.01) B01J 23/40 (2006.01) B01J 31/06 (2006.01) B01J 35/00 (2006.01) C07B 37/04 (2006.01) C07C 5/03 (2006.01) C07C 29/17 (2006.01) C07C 29/48 (2006.01) C07C 45/30 (2006.01) C07C 45/62 (2006.01) C07C 45/68 (2006.01) C07C 201/12 (2006.01) C07C 205/06 (2006.01) C07C 205/35 (2006.01) C07C 205/45 (2006.01) C07C 205/56 (2006.01) B01J 31/28 (2006.01) B01J 37/02 (2006.01)

Patent

CA 2453113

A microencapsulated catalyst is prepared by dissolving or dispersing a catalyst in a first phase (for example an organic phase), dispersing the first phase in a second, continuous phase (for example an aqueous phase) to form an emulsion, reacting one or more microcapsule wall-forming materials at the interface between the dispersed first phase and the continuous second phase to form a microcapsule polymer shell encapsulating the dispersed first phase core and optionally recovering the microcapsules from the continuous phase. The catalyst is preferably a transition metal catalyst and the encapsulated catalyst may be used for conventional catalysed reactions. The encapsulated catalyst may recovered from the reaction medium and re-cycled.

Selon la présente invention, un catalyseur microencapsulé est préparé par dissolution ou dispersion d'un catalyseur dans une première phase (par exemple, une phase organique), dispersion de la première phase dans une seconde phase continue (par exemple, une phase aqueuse) pour former une émulsion, mise en réaction d'une ou de plusieurs matières de formation de paroi à microcapsules sur l'interface entre la première phase dispersée et la seconde phase continue pour former une enveloppe polymère à microcapsules par encapsulation de la première âme de phase dispersée et éventuellement par extraction des microcapsules de la phase continue. Ledit catalyseur est de préférence un catalyseur de métal de transition et ledit catalyseur encapsulé peut être utilisé pour des réactions catalysées classiques. Ledit catalyseur encapsulé peut être extrait du milieu réactionnel et recyclé.

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