Method for preparing geniposide in eucommia leaf
A technology of geniposide and Eucommia ulmoides leaves is applied in the field of preparing geniposide from Eucommia ulmoides leaves, which can solve the problems of large amount of waste water, low product purity, low extraction rate and the like, and achieves low water extraction temperature and simple membrane operation process. , the effect of shortening the extraction time
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[0024] Example 1. See the instructions attached figure 1 , Take 10Kg of dried Eucommia leaves, pulverize and pass through 80 mesh sieve, add 120Kg of water, adjust the temperature to 55℃, keep the temperature constant and adjust the pH to 4.5, then add 10g of cellulase, extract 60min under these conditions, filter, filter the residue again Extract for the second time according to the aforementioned extraction conditions, combine the two filtrates, and routinely filter. The extraction rate of geniposide is 95.8%; the operating conditions are P=0.3Mpa, T=45℃, PH=4.5, Q=70L / min The filtrate was passed through a 0.03μm ultrafiltration membrane, the extract was concentrated 11.2 times under this condition, and the average flux of the ultrafiltration membrane was 226.3L / m 2 ·H; Under the operating conditions P=1.5Mpa, T=50℃, PH=4.5, Q=20L / min, the ultrafiltration filtrate is then passed through a 200 molecular weight nanofiltration membrane, the ultrafiltration filtrate is concentrate...
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