This study aimed at developing an innovative strategy to recycle homogeneous olefin metathesis catalysts by the combination of complementary green processes, namely organic solvent nanofiltration coupled with ionic liquid advantages. The immobilisation of an ionically tagged Hoveyda catalyst in an ionic liquid previously supported on a solvent-resistant polyimide membrane (Starmem 228) was prepared leading to an original catalytic membrane successfully used in a membrane reactor for a model metathesis reaction. (C) 2010 Elsevier B.V. All rights reserved.