Try to find how much toluene, acetone and isobutanol this solvent has first. If the majority is toluene, then acetone can be washed away by washing the solvent with water and always keeping the solvent (top) layer 2-3 times. Isobutanol does not mix with water very well and floats on top, but it should not pose great problems if some of it is left in the solvent.
With toluene and or xylene the best teks are the ones that back-salt the freebases in the solvent after the pull, such as FASA, FASI and FASW, also vinegar wash and then evaporation will also work fine. Converting back to salt is almost mandatory when working with toluene, xylene and limonene becasue they cannot be freeze-precipitated and it takes ages for them to evaporate. By ages I mean AGES!
Need to calculate between salts and freebases?
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Need to calculate freebase or salt percentage at a given pH?
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