It all depends on the nature of the mixture from wich you want to extract your compound. So what are the mates in this mix?
Anyway generally speaking I would try and follow one of the strategies below or a combination
1) cristallisation
2) trituration
3) working with the solubility at different pH (being an hydrochloride salt I assume it has a certain stability in acidic environment which I take is mantained to neutral pH given the absence of efficient nucleophiles)