There's really no such thing as a crude extract. You put more thought into acknowledging that the question may be ridiculous than the question itself.
I'm gonna try to help here, I'm taking a guess of the intention communicated with the crude word and giving an answer aimed at that, but the answer would be much different otherwise..
Powder or pulverize it, add at least 2/3 water, add lye, or at least sodium carbonate till it turns blackish, then go ahead with your xylene.
That's about as simple as it gets, if that's too complicated then you must spend some more time over at the wiki.
Everything i say is fictional, I just wanna be cool and fit in.