A kind of method extracting dehydroepiandrosterone from sweet potato
A dehydroepiandrosterone, sweet potato technology, applied in the direction of steroids, organic chemistry, etc., can solve the problems of long time, low efficiency, low extraction rate of DHEA from sweet potato, etc., and achieve stable product quality, short pretreatment time, and process Conditional effects
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Embodiment 1
[0027] A method for extracting dehydroepiandrosterone from sweet potatoes, the steps are as follows:
[0028] 1) Pre-conversion treatment:
[0029] Wash the fresh sweet potatoes to remove impurities, make a pulp, add 20% by weight of the treatment liquid to the sweet potato pulp, stir at a constant temperature at 8°C for 4 hours, then wash the sweet potato pulp with water to neutrality, filter and then add 1.6 times the weight of the sweet potato pulp to the sweet potato pulp Grind with water for 30 minutes with a colloid mill, centrifuge, and place the resulting precipitate in a water bath at 60°C for 12 hours. The main function of the water bath is to enzymatically convert a part of furostanol saponin into spirosterol saponin, and the latter is more easily converted into diosgenin. Thereby further improving the yield of saponin.
[0030] The treatment liquid is NaOH, urea, CaCl 2 Mixed solution, NaOH, urea, CaCl in the mixed solution 2 The weight concentrations are 8%, 8%...
Embodiment 2
[0038] A method for extracting dehydroepiandrosterone from sweet potatoes, the steps are as follows:
[0039] 1) Clean and remove impurities from fresh sweet potatoes, make a pulp, add 15% by weight of the treatment solution to the sweet potato pulp, stir at a constant temperature at 0°C for 5 hours, then wash the sweet potato pulp with water until neutral, filter and then add 2 times weight of water and grind with a colloid mill for 60 min, centrifuge, and place the resulting precipitate in a water bath at 80°C for 8 h.
[0040] The treatment liquid is lithium hydroxide, urea, ZnCl 2 Mixed solution, lithium hydroxide, urea, ZnCl in the mixed solution 2 The weight concentrations are 5%, 10%, and 5%, respectively.
[0041] 2) Then add 3% by weight of concentrated H to the precipitate 2 SO 4 , hydrolyzed at 80°C for 16h, cooled to room temperature, adjusted the pH to neutral with NaOH solution, centrifuged, and collected the precipitate.
[0042] 3) Add 5 times the weight o...
Embodiment 3
[0045] A method for extracting dehydroepiandrosterone from sweet potatoes, the steps are as follows:
[0046] 1) Clean and remove impurities from fresh sweet potatoes, make a pulp, add 40% by weight of the treatment solution to the sweet potato pulp, stir at a constant temperature at 5°C for 2 hours, then wash the sweet potato pulp with water until it is neutral, filter and then add 1 times to the sweet potato pulp weight of water and grind with a colloid mill for 10 minutes, centrifuge, and place the resulting precipitate in a water bath at 50°C for 24 hours.
[0047] The treatment liquid is potassium hydroxide, urea, MgCl 2 Mixed solution, potassium hydroxide, urea, MgCl in the mixed solution 2 The weight concentrations are 10%, 7%, and 2%, respectively.
[0048] 2) Then add 1% by weight of concentrated H to the precipitate 2 SO 4 , hydrolyzed at 100°C for 8h, cooled to room temperature, adjusted the pH to neutral with NaOH solution, centrifuged, and collected the precip...
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