Method for extracting synephrine from ripe navel orange peels

Abstract

The invention discloses a method for extracting synephrine from ripe navel orange peels. The method comprises the steps as follows: (1) dried navel orange peels are crushed and then mixed with distilled water, complex enzyme is added for enzymolysis, and an enzymolysis mixture is obtained; (2) the enzymolysis mixture is subjected to ultrahigh-pressure enzyme deactivation treatment, the pH is adjusted to 5.0-6.0, subcritical extraction is performed under nitrogen protection, centrifugation is performed after extraction, and a liquid supernatant is collected; (3) the liquid supernatant obtainedin the step (2) is subjected to ultrafiltration separation with an ultrafiltration membrane with the molecular interception being 5,000 u-10,000 u, and a concentrated solution is collected; (4) the concentrated solution obtained in the step (3) is mixed and stirred with ethanol, the obtained mixed solution is subjected to reduced pressure suction filtration and freeze drying, and synephrine is obtained. The method has the advantages of being high in extraction rate and extraction efficiency, mild in treatment condition, environmentally friendly and the like.

Description

technical field

[0001] The invention belongs to the technical field of natural plant extraction, in particular to a method for extracting synephrine from ripe navel orange peel. Background technique

[0002] Navel oranges are abundant in Fuchuan County, Hezhou City, Guangxi, and their peels are the main by-products in the process of eating and processing. According to the survey, there is less comprehensive utilization of tribute orange and navel orange peels in this area. At present, except for a small amount of citrus peels used for processing tangerine peels, there is basically no other use. Most of them are discarded as waste, which not only wastes precious resources, but also seriously pollute the environment. In fact, citrus peels contain many active ingredients such as synephrine and hesperidin, so they are raw materials with potential industrial production value. Synephrine is an alkaloid that constricts blood vessels, raises blood pressure, and strongly dilates tr...