Method for extracting flavonoid compounds from sunset abelmoschus flowers

Abstract

The invention provides a method for extracting flavonoid compounds from sunset abelmoschus flowers. The method includes the steps: mixing dried sunset abelmoschus flowers and water of 10-30 times, and performing heating reflux extraction on mixture for 0.5-2 hours to obtain extracting solution; performing pressure reduction concentration on the extracting solution to obtain concrete with the proportion of 1.00-1.10 at the temperature of 60 DEG C; performing band drying on the concrete at the temperature of 60-120 DEG C to obtain a sunset abelmoschus flower flavonoid extract. Steam pressure is 0.01-0.5Mpa, water temperature is 108 DEG C or more when heating reflux is performed, pressure reduction concentration temperature is 60-90 DEG C, and vacuum degree is 0.05-0.10Mpa. The invention further provides a sunset abelmoschus flower extract. The extraction method is simple in process, low in cost, easy to control and suitable for industrial production the extract is rapidly dried, effective components are complete, the production period of the sunset abelmoschus flower extract can be greatly shortened by the preparation method in the industrial production, and production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a method for extracting flavonoids from hollyhock flowers, belonging to the technical field of plant extraction. Background technique [0002] Hollyhock has another name called yellow sunflower, okra, yellow hibiscus, yellow lotus, etc., Latin name: Abelmoschus manihot (Linn.) Medicus, is an annual or perennial stout and erect herb of Malvaceae and okra. Its pharmacological efficacy has been clearly recorded in medical records of past dynasties and "Dictionary of Chinese Medicine". The hollyhock flower is the dried flower of the Malvaceae plant hollyhock. The hollyhock flower and flower buds are cone-shaped yellow, containing flavonoids, mucus, anthocyanins, tannic acid, alkaloids, etc. The nature and taste are sweet and cold, non-toxic, and have the effects of detoxification, anti-inflammation, and clearing dampness and heat. It can be used to treat stranguria, edema, and nephritis internally; to treat carbuncles, ulcers, swo...

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned first method is a method for laboratory research on a single flavonoid component, which is not suitable for the preparation of total flavonoids; the second method uses the adsorption technology of a macroporous adsorption resin column or a polyamide column in the preparation process, although the macroporous resin or polyamide It is an effective purification and refining method for enriching active ingredients and removing impurities, but its porogen and degradation products are toxic, and this technology is applied in large-scale production with high cost and long cycle, and it is not easy for large-scale production industrialization process; In the preparation process of the three methods, the adsorption technology of macroporous adsorption resin column or polyamide column is also applied, which is not suitable for large-scale production industrialization process. In addition, during the decompression drying process, the total flavonoids extract of hollyhock flower is easy to agglomerate, while the vacuum The drying cycle is long and the coking phenomenon is serious, which directly affects the content and quality of the total flavonoids extract of marshmallow flower, and finally leads to a large dosage of the preparation at one time; the preparation process of the fourth method is suitable for large-scale production, but it needs to be refrigerated, and the upper layer of the refrigerated liquid is removed. Reservoir, pH adjustment and other steps, the cycle is long, the cost is high, and the process is cumbersome, which directly affects the production process

Images