Abstract: The clean production of extraction for the diosgenin with solutions from yam has been studied. Firstly this process of the clean production separates starch, cellulose and other ingredients from disocin by solvent. Then by solution of Disocin, disacidifying, purification, crystallizing and re-crystallizing, high purity diosgenin can be obtained. The research indicates the extraction will be better using the broken-down wall technology together with solvent. In that condition, the loss of solvent is less than 2% , the pressure of acidolysising is in accord with the atmospheric pressure, acidity is 1mol / L and it will take 5 hours to acidolysis it. The rate of obtaining Dodogenin can reach 1% under these conditions. The acid will be less 90% than traditional process if we use the new process. Using this process of the clean production, the production cycle will be shorter. Another important thing about this process is that there is no loss of the ingredients of starch and cellulose after extraction so they can be used to carry on other deep processings.
Key words: Yam; Broken-down wall craft; Yam Disogenin; Disacidify; the craft of extraction; the craft of purification;

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