Method for extracting black wolfberry seed oil by virtue of subcritical fluid

Abstract

The invention discloses a method for extracting black wolfberry seed oil by virtue of subcritical fluid. The method comprises the steps: (1) placing dry black wolfberry seeds and an extracting agent into an extraction kettle of a subcritical fluid extraction apparatus according to a mass-volume ratio of 1:1 to 1: 20, continuously extracting for 1 to 20 times to obtain extract, wherein the extraction time is 10 to 15 minutes per time; (2) separating the extract in the step (1) by utilizing a pressure reduction heating method under the condition that the separation pressure is 0.10 to 1.95 MPa and the separation temperature is 10 to 90 DEG C, to obtain an extraction solution; (3) standing the extraction solution for 10 to 90 minutes under the room temperature, to obtain the black wolfberry seed oil. By adopting the method, not only can the production cost be effectively reduced, the extraction and separation time is shortened, and the consumption of solvent and energy consumption in the process flow can be reduced; moreover, the method is simple in process flow, high in operability, high in extraction efficiency, environment-friendly, pollution-free, good in safety and repeatability and capable of realizing the industrialized continuous mass production.

Description

technical field [0001] The invention relates to a method for extracting black wolfberry seed oil, in particular to a method for extracting black wolfberry seed oil with a subcritical fluid. Background technique [0002] Black wolfberry is sweet in taste and flat in nature, rich in protein, fat, sugar, free amino acid, organic acid, mineral, trace element, alkaloid, vitamin C, B 1 , B 2 , calcium, magnesium, copper, zinc, manganese, iron, lead, nickel, cadmium, cobalt, chromium, potassium, sodium and other nutrients, especially the high content of proanthocyanidins. Black wolfberry is distributed in western Qinghai, Jiuquan, Gansu, central Xinjiang, western Inner Mongolia, Ningxia and Tibet. [0003] In addition, the analysis by gas chromatography spectrometry shows that the unsaturated fatty acid in black wolfberry oil is close to 80%, which has good health care value and medicinal value. Because black wolfberry oil contains a large amount of nutrients and physiologically...

AI Technical Summary

Problems solved by technology

The mechanical pressing method has long pressing time, low oil yield, high impurity content, poor oil quality, and darker color; the organic solvent extraction method has long extraction time, low efficiency, large solvent consumption, and easy to cause solvent residue in the product and a series of disadvantages; while supercritical fluid extraction has high requirements for equipment, complex process, small equipment volume, high cost, and high energy consumption, so it is not suitable for large-scale industrial continuous production