Process for production of ionically crosslinked...

B - Operations – Transporting – 01 – J

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B01J 13/14 (2006.01)

Patent

CA 2557107

The invention relates to a process for preparing microspheres comprising an ionically crosslinked polymer, the process comprising: (a) producing liquid aerosol droplets (13) from a solution (3) comprising an ionically crosslinkable polyionic polymer into a continuous gas stream by using an ultrasonic nebulizer; (b) transferring the gas stream into a gelling solution (10) comprising di-, multi- or polyvalent ions, whereby crosslinked polymer microspheres (14) are formed, (c) separating the microspheres from the gelling solution, and (d) optionally, filtering the microspheres through a screen.

La présente invention concerne un procédé pour préparer des microsphères comprenant un polymère réticulé par voie ionique. Ce procédé consiste (a) à produire des gouttelettes liquides aérosol (13) à partir d'une solution (3) comprenant un polymère polyionique pouvant être réticulé par voie ionique dans un courant de gaz continu, en utilisant un nébuliseur ultrasonore, (b) à transférer le courant de gaz dans une solution de gélification (10) comprenant des ions bivalents ou polyvalents, ce qui permet de former des microsphères de polymère réticulé par voie ionique (14), puis (c) à séparer les microsphères de la solution de gélification et (d) à filtrer éventuellement les microsphères à travers un crible.

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