No, because recognizing Catalan independence will be used against them for recognizing “Palestine.”
“Palestine” has already been recognized by several countries, and twice by the UN General Assembly. Yet on the ground there is no sign of it here. Recognizing Catalan would hardly alter things for the worst. Spain’s hypocritical recalcitrance itself would make it easier to not recognize “Palestine,” and the actual “Palestinians” would breath a sigh of relief. While we’re at it, let’s recognize Basque-land, should it do a referendum, and also Ruthenia.