The invention provides an extraction method of
diosgenin, which comprises the following steps: step 1,
dioscorea zingiberensis
rhizome and an extraction
solvent are put into a crushing extraction device, the crushing extraction device comprises a feed port, a
discharge port, a rotating shaft, crushing blades connected with the rotating shaft and a heater, and the rotating speed of the rotating shaft is 800-900 r / s; step 2, after the
rhizome of
dioscorea zingiberensis and the extraction
solvent are extracted for 1-1.5 h in the crushing extraction device, discharging the mixture from a
discharge port, filtering, concentrating the filtrate until no
alcohol smell exists, adding
distilled water, fully stirring,
settling and centrifuging to obtain a precipitate, namely dioscin; 3, dioscin and
helicase are put into a reaction container, and an
acetic acid-
sodium acetate
buffer solution is added for
hydrolysis; 4, after the
hydrolysis reaction is finished, a
hydrolysis product is inactivated, suspension is centrifuged, supernate is removed,
sediment is washed with
distilled water, residues are dried and recrystallized with an
organic solvent, and
diosgenin is obtained. According to the present invention, the dioscin is extracted from the yam
plant by using the crushing extraction device, and the
diosgenin is further obtained by using the enzymolysis, such that the extraction method can improve the diosgenin extraction amount, can avoid the use of a large amount of acid, can alleviate the environmental
pollution problem, and has good industrial application prospects.