separation alcohol from fatty acid

i have final project to produce polyol for polyurethane from oleic acid.
i have problem in purification of product (polyol) from alcohol (methanol and isoprophanol)as reactant.i ever try to remove alcohol from polyol with distilation but that's way is need long time. and now i think the good way to remove alcohol from polyol is by extraction, but i don't know which solvent can remove alcohol from polyol?
1000000... thank's for the answer and attention

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