Extraction of oligomeric anthocyanin from pine bark

Abstract

Extraction of oligomeric protocyanidin from pine barks is carried out by: extracting it from raw pine bark powders with a polar organic solvent at first to obtain extracting liquid containing it richly, adding anti-solvent to deposit it out, and separating solid from liquid to obtain deposited products. Petroleum ether or sulfuric ether is used as solution to remove grease and as anti-solvent. Ethyl acetate or ethanol is used as extracting solution. It is simple, saves energy, and has neither pollution nor much investment. Its products can be used in food, cosmetics or medicines as anti-oxidizing agent.

Description

technical field

[0001] The invention relates to a method for extracting oligomeric proanthocyanidins from pine bark. An oligomeric proanthocyanidin (OPC) product is obtained by adding an antisolvent to the extract and directly precipitating, which belongs to the field of natural product extraction. Background technique

[0002] Oligomeric proanthocyanidins (OPC) are polyphenolic compounds, which are polymerized from catechin and epicatechin. Because the molecules of this kind of substances have many electronic hydroxyl sites, they have strong antioxidant capacity, free radical scavenging ability and special improvement effect on human microcirculation. According to reports, the antioxidant capacity of OPC in the body is It is 50 times that of vitamin E and 20 times that of vitamin C. It is widely used in food, cosmetics, and medicine. Oligomeric proanthocyanidins widely exist in natural plants, such as grapes, sea buckthorn, apples, sorghum, legumes, pine bark, etc. Among ...