If you want to recycle your solvent, simple recovery in a rotavap isn't enough to purify them (except in special cases, where there are no water or other solvents contaminating it), as the separation efficiency is almost nonexistant in such an apparatus.
Instead make a crude recovery of all your volatiles using the rotovap, then dry the mixture, filter off the drying agent and then carefully distill the solvent slowly, collecting only what comes over in about a ~5°C range, any pre- and post-run you may fractionally redistill to recover even more of your solvent.