PROCESS OF RECOVERY OF PURE CURCUMINS FROM TURMERIC RHIZOMES

摘要

A method for extraction of curcumins from turmeric rhizomes comprising of : a) Comminuting and drying of the wet turmeric rhizomes b) Extraction of curcumin from the dried rhizomes obtained in step (a) by suspending the rhizomes in aqueous alcohol solvent system under vigorously agitating conditions for a sufficient amount of time at a temperature in the range between 25-80° C. c) isolating the aqueous alcoholic solution of curcumins from the solid residue of turmeric from the suspension of step (b). d) Concentrating the isolated extract solution obtained in step (c) by 80-90 % evaporating the solvent and volatile oils of turmeric from the extract solution where the extent of evaporation is limited to 80-90 % of the original volume. t e) Crystallizing curcumins in purified form from the concentrated extract of step (d) by temperature induced solvent crystallization at a temperature in the range between 5-30°C. f) Separating the crystallized curcumin in pure form, from the remaining liquid solution.