A kind of extraction method of xylan in hickory nut shell

Abstract

The invention discloses a method for extracting xylan from hickory shells. The method comprises the following steps: adding hickory shell powder and a solid phase reagent into a ball mill, grinding the hickory shell powder and the solid phase reagent to obtain ball-milled mixed powder, adding a limited volume of water to the powder, vibrating and centrifuging the obtained solution, collecting theobtained supernatant, and freeze-drying the supernatant to obtain the xylan. The hickory shell powder and the solid phase reagent are commonly ground and crushed under the action of high-energy mechanical force, and water is as the solvent in the extraction process, so the emission of a waste liquid is reduced, the obtained xylan has the advantages of high purity, remarkably improved content of xylose in monosaccharide compositions, good color and no decolorizing, the process flow is simplified, and the production cost is reduced. The method has the advantages of simplicity in operation, shortextraction time, mild extraction conditions, high efficiency, low energy consumption, environmental protection, and easiness in large-scale industrial production, is a method for preparing xylan fromhickory shells, having a good promotion and application prospect, and lays a foundation for the further development and utilization of the xylan in the hickory shells.

Description

technical field

[0001] The invention belongs to the technical field of production and technical application of plant polysaccharides, and in particular relates to a method for extracting xylan from hickory nut shells. Background technique

[0002] Hickory is a deciduous tree belonging to the genus Hickory in the family Juglandaceae. Its fruit has extremely high nutritional value and unique taste and flavor. The inner husk contains 38.05% lignin, 30.88% cellulose, and 27.26% hemicellulose, among which hemicellulose is an important raw material for the preparation of xylan. But until now, the research on hickory nut shells has mainly focused on small molecular compounds such as flavonoids and brown pigments, and less research on xylan, resulting in a great waste of resources. Xylan is an abundant biomass resource and the most abundant polysaccharide in nature besides cellulose. According to reports, xylan can be degraded into xylooligosaccharides, which have a wide range of ...

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