Catalonia society already voted many times, and the results were very clear, with no support to independence. You can translate from here all the times they did:
https://es.wikipedia.org/wiki/Proceso_soberanista_de_Catalu%...
As I said in my previous comment, there haven`t been any referendums about independence in Spain (I live in Spain so I think I know about what I'm talking), basically because the spanish goverment doesn't want to, and on the other hand, the so called "rigth to choose or decide" with a referendum is one of the things Catalonians (and also Basks) want.