Oil-water emulsion doesn't separate
I have encountered the same problem with plant extracts. I think the term is hydro/sol when the extract is suspended in aqueous solution. Anyway, I've had some success with heavy sodium chloride brine then chilling the solution to near freezing for an extended time (a week or so). Even then the return hasn't been that impressive. In most cases making a tincture (or gas)extraction then distilling the product (if you still need to) produces a much better yield.