maybe recrystallization from methanol/Et2O works, otherwise Flash column chromatography always stands as the best friend.

Thank you Luigi Grassi

you are welecome...do not play so much on recrystalliyations.....usually the material lost per cycle amounts at the 5-10% depending on experience :D..the best and most trustworthy way is the flash cc. ;) good luck

This is a tricky problem. Acrylic acid (AA) is always problematic one to handle. It would have been easier to suggest a solution if the major component were known.

Assuming that the major component is 4-methoxy-phenol, neutralisation of AA with aqueous  Na2CO3  and then extraction of phenol with an organic solvent like diethyl ether / ethyl acetate , could be the solution.