Technology for extracting flavone from shoe-shaped maple leaves

Abstract

specifically a process for extracting flavone from shoe-shaped ingot maple leaves, where the maple leaves are immersed and heated by 60% propanone, filtered and extracted repeatedly, an extraction solvent is used to clean the leaves slag and filter pressed, the filter liquor is merged, the dissolvent is recovered through depression , the aqueous phase is degreased by petroleum ether to concentrate into concrete, and the bronze yellow product is finally prepared after vacuum drying, disintegrating and weighing.

Description

1. Technical field: [0001] The invention relates to a process for extracting medicinal plant components, in particular to a process for extracting flavonoids from ingot maple leaves. 2. Technical background: [0002] In the prior art, there are four methods for extracting flavonoids from maple ingots: hot water extraction, lye extraction, 70% ethanol extraction, and methanol extraction; (1), the extraction rate of hot water extraction and the content of flavonoids are relatively low , and the extract is easily corrupted and deteriorated in storage, and the subsequent operations such as filtration and drying are difficult and time-consuming. The reason is that it is easy to extract proteins, sugars and other water-soluble components due to the use of highly polar water as a solvent. (2) The yield of flavonoids in the methanol extraction method is low, and the cost of this method is high, the pollution is serious, the extraction process is complicated, and the methanol and lea...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, there are four methods for extracting flavonoids from maple ingots: hot water extraction, lye extraction, 70% ethanol extraction, and methanol extraction; (1), the extraction rate of hot water extraction and the content of flavonoids are relatively low , and the extract is easily corrupted and deteriorated in storage, and the subsequent operations such as filtration and drying are difficult and time-consuming. The reason is that it is easy to extract proteins, sugars and other water-soluble components due to the use of highly polar water as a solvent. (2) The yield of flavonoids in the methanol extraction method is low, and the cost of this method is high, the pollution is serious, the extraction process is complicated, and the methanol and lead acetate used are toxic reagents, which are not suitable for ingots. Extraction of maple leaf flavonoids

(3), extract with alkaline aqueous solution, although the expense of consuming solvent is lower than ethanol method etc., product yield improves limited; (4), overcome shortcomings such as water extraction method deposits easy mildew with 70% ethanol extraction method, It has the advantages of high yield and flavonoid content, and the subsequent operations such as filtration, recovery of solvent, and drying are relatively easy, but the yield is still not ideal; analysis by test: leaf weight 50g, 70% ethanol extraction flavonoid content 35.0%, extraction The rate is 12.20%, the weight of the extract is 6.10 grams, the extraction rate is limited

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