Method for preparing red jujube essence and red jujube polysaccharides by using defective jujubes

Abstract

The invention discloses a method for preparing red jujube essence and red jujube polysaccharides by using defective jujubes. The method comprises the following steps of adding pectinase into the defective jujubes for enzymolysis after cleaning, removing cores, crushing, adding water and pulping; adding lipase, lipoxidase and neutral protease to carry out enzymolysis to obtain enzymatic hydrolysate; extracting and settling the enzymatic hydrolysate after crushing through a colloid mill to obtain liquid supernatant and jujube residues, wherein the liquid supernatant is concentrated and then added into reaction media for heated distilling, and the heated distilling is changed to heated refluxing when the reaction temperature reaches the final temperature; filtering by a sheet frame, wherein the obtained filtrate is red jujube essence; and concentrating, spraying and drying the jujube residues to obtain red jujube polysaccharides after synchronously discoloring and extracting the jujube residues. The red jujube essence prepared by the method has strong roasted sweet aroma of jujubes, can be applied to cigarette products and can be used for improving the aroma. The jujube residues are changed into things of value by the preparation process of the red jujube polysaccharides, and therefore, the method has the process which is simple and easy to implement, has low production cost and higher market competitiveness in the polysaccharide industry.

Description

technical field [0001] The invention belongs to the field of food additives, and specifically uses biological enzyme conversion technology to process defective jujubes to prepare jujube essence with strong roasted aroma, and simultaneously uses extraction and decolorization synchronous spray drying to prepare jujube polysaccharides. Background technique [0002] my country has more than 95% of jujube resources and jujube products in the world, with an annual output of 2.3 million tons, but a large number of defective dates are produced during the production, processing and storage of jujubes, accounting for about 20% of the total output. Although there are researches and applications on the production of jujube vinegar and jujube wine by using defective jujubes at present, the quality of the products is not stable and the overall scale is small, so it is not yet possible to form an effective transformation capacity of defective jujube resources. [0003] Most traditional juj...

AI Technical Summary

Problems solved by technology

At present, although there are researches and applications on the production of jujube vinegar and jujube wine by utilizing defective jujubes, the quality of the products is unstable and the overall scale is small, so it is not yet possible to form an effective transformation capacity of defective jujube resources.

[0003] Most traditional jujube tinctures are prepared by continuous extraction with low-alcohol ethanol, which has many disadvantages: ① part of the natural jujube aroma is lost during the extraction process, and the aroma is weak; the addition amount in cigarettes is large, up to 0.4%; ② the product contains Macromolecular components—sugars and proteins, have poor miscibility with other flavors and fragrances, and product applications are limited; ③The jujube tincture still contains 16% to 20% of the extraction solvent—ethanol, which increases the irritation of cigarettes to a certain extent. Affecting the smoking quality of cigarettes

[0005] The above studies have made some progress in the preparation of jujube essence, but there are still some defects: the microbial fermentation technology has overcome the shortcomings of the traditional extraction process to a certain extent, but the aroma of the jujube extract is weak, and there are microbial fermentation The cycle is long, and it is easy to produce defects such as bacterial contamination; hydrochloric acid hydrolysis is easy to produce toxic and harmful substances; according to the analysis of the volatile components of jujube essence, the jujube essence formulated by simulation is limited to some aroma components that can be separated and analyzed, not all

Patent CN201310090353 adopts biocomposite enzymatic hydrolysis technology to extract, and adopts polyamide column chromatography technology to purify jujube polysaccharide, which not only solves the problems of low extraction rate and low biological activity of the current extraction method

However, the above extraction methods are complicated in process, require multiple extractions for a long time, and the cost is high, which is far from the level of commercial production.

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