Technological method for extraction of protocatechuic acid from Blumea riparia (Bl.) DC
The technology of protocatechuic acid and process method is applied in the field of extraction of protocatechuic acid, can solve the problems of low preparation purity, complicated preparation process, difficult industrialized production and the like, and achieves high extraction yield, high separation ability and simple method Effect
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Embodiment 1
[0032] The process of extracting protocatechuic acid from Yunnan osmanthus Ainaxiang:
[0033] Put the impurity-removed medicinal material of Yunnan Gui Ainaxiang into an extraction tank, add water to decoct twice, add 10 times the amount of water for decoction for 1.5 hours for the first time, and decoct for 1 hour with 10 times the amount of water for the second time, and control the temperature at 60°C, filter with a 200 mesh filter cloth, and combine the filtrates; Concentration: The filtrate is concentrated to a concentrated solution with a relative density of 1.08 at 58°C, moved to a sedimentation tank, and left to stand for 8 hours. An extract with a relative density of 1.36 °C; the extract is dissolved in 5 times the amount of water and heated to 65°C, dissolved and filtered to obtain an aqueous solution of the extract, adjusted to a pH of 6, extracted with butanone, and the total amount of butanone is controlled at 0.2 ~1 times the volume of the aqueous extract soluti...
Embodiment 2
[0035] The process of extracting protocatechuic acid from Yunnan osmanthus Ainaxiang:
[0036] Put the impurity-removed medicinal material of Yunnan Gui Ainaxiang into the extraction tank, add water to decoct twice, add 10 times the amount of water to decoct for 1.5 hours for the first time, add 8 times the amount of water to decoct for 1 hour for the second time, and control the temperature to 65°C, filter with a 180 mesh filter cloth, and combine the filtrates; Concentration: The filtrate is concentrated to a concentrated solution with a relative density of 1.08 at 65°C, moved to a sedimentation tank, left standing for 8 hours, and treated by sedimentation and centrifugation, and the clear filtrate is concentrated to 65°C The extract with a relative density of 1.38 °C; the extract is dissolved in 5-8 times the amount of water and heated to 60°C, dissolved and filtered to obtain an aqueous solution of the extract, adjusted to a pH of 5, extracted with butanone, and the total a...
Embodiment 4
[0041] The difference between this example and the above example is that, besides methyl ethyl ketone, the organic solvent can also be one of n-butanol, ethyl acetate, diethyl ether or petroleum ether, and the total amount of organic solvent is controlled to be 0.2 to 1 times The volume of aqueous extract solution.
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