Cant freeze precipitate from heavier solvents such as dlimonene or xylene.

Can use them to salt out, meaning after extraction of basified liquid, seperate the solvent and wash it with an acidic solution (vinegar) to convert the alkaloid back into salt form therefore water soluble again. In essence it is a defat step aswell as oils will remain in the non polar region. After 3 x or more extractions of non polar solvent into vinegar can seperate it and evaporate the vinegar and be left with jim jam red goo. From there you have concentrated salt form alkaloids can refine further. Either do a dry tech converstion back to freebase and extract with acetone, or a variety of paths from there. You wont be left with cystals but can make changa or eliquid, or pharmahuasca.