A convenient method for the large-scale isolation of gracinia acid

摘要

A process for the isolation of Garcinia acid from the fresh or dried rinds of the fruits of Garcinia indtca, Garcinia cambogia, Garcinia atroviridis, comprising the steps of, in sequence : a) subjecting the rinds to extraction to form an extract. b) Adding a solvent to the extract to remove pectin and form a filtrate c) Converting the filtrate to form an alkali salt d) Neutralizing the alkali salt with an acid, followed by evaporation, to form a concentrate e) Purifying said concentrate using a solvent to remove inorganic matter as impurities, to form a second filtrate f) Concentrating the second filtrate to ytekl a crude Gardnia acid g)Recrystallizing the crude to form pure crystals of Gradnia acid.