There's not enough information for a simple generic answer because it depends on the impurities and their concentrations.
Solvent extraction can be used, and also chromatography based on liquid extraction (CPC, CCC, and so forth) when a simple extraction isn't quite good enough.
Whereas..Solvent extraction can be used, and also chromatography based on liquid extraction (CPC, CCC, and so forth) when a simple extraction isn't quite good enough