Method for increasing aloin extraction yield
A technology of aloe extract and aloin, which is applied in the field of extraction of aloin and active ingredients of aloe, which can solve the problems of low purity of the extract, low yield, pollution, etc., and achieve the effect of good product purity and increased yield
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[0029] Example 1
[0030] S1: Take 100kg of Aloe vera leaves, peel off the skin, mash the inner leaf flesh, add 200kg of n-hexane, then add 1kg of citric acid and 1kg of ammonium sulfate, stir evenly, perform heating and reflux extraction, reflux time is 1 hour;
[0031] S2: suction filtration of the material liquid after reflux extraction to obtain suction filtrate;
[0032] S3: Pass the suction filtrate into a chromatographic column equipped with spherical expanded silica gel to adsorb the components in the extract;
[0033] S4: Perform elution on the chromatographic column in step S3, the elution speed is controlled at 2BV / h, and the elution time is 60 minutes;
[0034] S5: After heating and concentrating the eluent until the volume becomes 1 / 3, cooling to 2°C to crystallize, filtering and drying to obtain the crude aloe extract;
[0035] S6: Pour the crude aloe extract and No. 6 solvent oil into the supercritical carbon dioxide extraction device at a weight ratio of 1:1.5, and treat...
Example Embodiment
[0039] Example 2
[0040] S1: Take 120kg of Aloe vera leaves, peel off the skin, mash the inner leaf flesh, add 240kg of n-hexane, then add 3kg of citric acid and 3kg of ammonium sulfate, stir evenly, perform heating and reflux extraction, reflux time is 2 hours;
[0041] S2: suction filtration of the material liquid after reflux extraction to obtain suction filtrate;
[0042] S3: Pass the suction filtrate into a chromatographic column equipped with spherical expanded silica gel to adsorb the components in the extract;
[0043] S4: Perform elution on the chromatographic column in step S3, the elution speed is controlled at 3BV / h, and the elution time is 100 minutes;
[0044] S5: Heat and concentrate the eluate until the volume becomes 1 / 3, cool to 4°C to crystallize, filter and separate and dry to obtain the crude aloe extract;
[0045] S6: Pour the crude aloe extract and No. 6 solvent oil into the supercritical carbon dioxide extraction device at a weight ratio of 1:2, and process for ...
Example Embodiment
[0049] Example 3
[0050] S1: Take 110kg of Aloe vera leaves, peel off the skin, mash the inner leaf flesh, add 210kg of n-hexane, then add 2kg of citric acid and 2kg of ammonium sulfate, stir evenly, perform heating and reflux extraction, reflux time is 1.5 hours;
[0051] S2: suction filtration of the material liquid after reflux extraction to obtain suction filtrate;
[0052] S3: Pass the suction filtrate into a chromatographic column equipped with spherical expanded silica gel to adsorb the components in the extract;
[0053] S4: Perform elution on the chromatographic column in step S3, the elution speed is controlled at 2.5 BV / h, and the elution time is 80 minutes;
[0054] S5: After heating and concentrating the eluent until the volume becomes 1 / 3, cooling to 3°C to crystallize, filtering and drying to obtain the crude aloe extract;
[0055] S6: Pour the crude aloe extract and No. 6 solvent oil into the supercritical carbon dioxide extraction device at a weight ratio of 1:1.7, and...
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