METHOD TO PURIFY FERULC ACID AND/OR SALTS THEREOF

摘要

Methods to purify ferulic acid and/or salts thereof, both in solid state as in solution, said methods include: dissolve the ferulic acid, with a selective organic solvent, recover and isolate the solution from the insoluble impurities with filters; recover the organic solvent evaporating the solution; mix the concentrated extract of ferulic acid with water to pre-crystallize the hydrosoluble impurities; evaporate the mixture to remove the remains of the organic solvent; concentrate the mixture free of solvent in an evaporator; cool the mixture down to 40 °C; let the concentrated mixture set for 1 h, to then isolate by sedimentation the water-insoluble impurities; re-heat the mixture free of impurities to 70 °C; purify the mixture through a synthetic resin, transfer the purified mixture to a crystallizing container to crystallize the ferulic acid; remove the mother liquor of crystallization of the precipitate of ferulic acid; dry the ferulic acid.