The Chemical & Biomolecular Engineering Department of the University of Cantabria was present at the congress ILSEPT – 4th International Conference on Ionic Liquids in Separation and Purification Technology, celebrated in Sitges (Spain) last September 8-11, 2019. Inmaculada Ortiz delivered the keynote “Polymer/ionic liquid composite membranes for complex gas separations” and presented the work “New ionic liquid copolymer membranes based on [HSO3-BVIm][TfO] with methyl methacrylate and fluorinated monomers for fuel cell applications”. Gabriel Zarca presented the oral communication “Composite Polymer/Ionic Liquid Membranes for the Recovery of High Global Warming Potential Fluorinated Refrigerants”. Daniel Gorri presented the work “Addition of IL to pervaporation membranes for improving the recovery of butanol”.