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Method for extracting longan pulp polysaccharide

A technology of longan meat polysaccharide and longan meat is applied in the field of deep processing of longan, which can solve the problems of high cost, low efficiency and long time, and achieve the effects of improving yield, improving enzymatic hydrolysis efficiency and improving enzymatic hydrolysis speed.

Active Publication Date: 2017-05-31
GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing longan polysaccharide extraction technology takes a long time, and the cost of separation and preparation is high and the efficiency is low

Method used

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  • Method for extracting longan pulp polysaccharide
  • Method for extracting longan pulp polysaccharide

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1. Preliminary preparation:

[0035] Preparation of copper oxide-zirconia catalyst: add 35g of anhydrous copper sulfate and 30g of zirconium oxychloride to 200g of deionized water, add 40% mass fraction of sodium hydroxide solution dropwise while stirring, and adjust the pH to 9. Filter, take the filter residue, wash twice with deionized water, air dry, microwave dry for 10 minutes, and finally roast in a muffle furnace at 1100°C for 2 hours to obtain a copper oxide-zirconia catalyst.

[0036] Preparation of lye: mix 10 g of potassium hydroxide, 10 g of 25% ammonia water and 100 g of deionized water, and stir to obtain lye.

[0037] Preparation of the ternary complex enzyme: mix 50 g of acid cellulase, 20 g of fructosidase and 15 g of protease to obtain a ternary complex enzyme.

[0038] The preparation of mixed alcohol solution: mix 1000 g of 95% mass fraction of ethanol aqueous solution, 100 g of 70% mass fraction of n-propanol aqueous solution, and 100 g of 70% mass fraction...

Embodiment 2

[0046] 1. Preliminary preparation:

[0047] Preparation of copper oxide-zirconia catalyst: Add 38g of anhydrous copper sulfate and 35g of zirconium oxychloride to 240g of deionized water, add 45% sodium hydroxide solution dropwise while stirring, and adjust the pH to 10. Filter, take the filter residue, wash 3 times with deionized water, air dry, microwave dry for 13 min, and finally roast in a muffle furnace at 1200° C. for 2.5 h to obtain a copper oxide-zirconia catalyst.

[0048] Preparation of lye: mix 10 g of potassium hydroxide, 18 g of 25% ammonia water and 120 g of deionized water, and stir to obtain lye.

[0049] Preparation of ternary complex enzyme: 65g acid cellulase, 23g fructosidase and 20g protease are mixed uniformly to obtain a ternary complex enzyme.

[0050] Preparation of mixed alcohol solution: mix 1200 g of 95% mass fraction of ethanol aqueous solution, 100 g of 75% mass fraction of n-propanol aqueous solution, and 133 g of 78% mass fraction of isopropanol aqueou...

Embodiment 3

[0058] 1. Preliminary preparation:

[0059] Preparation of copper oxide-zirconia catalyst: Add 43g of anhydrous copper sulfate and 37g of zirconium oxychloride to 260g of deionized water, add dropwise 44% sodium hydroxide solution while stirring, and adjust the pH to 11. Filter, take the filter residue, wash 3 times with deionized water, air dry, microwave dry for 15 minutes, and finally roast in a muffle furnace at 1150°C for 3 hours to obtain a copper oxide-zirconia catalyst.

[0060] Preparation of lye: mix 10g of potassium hydroxide, 24g of 25% ammonia water and 130g of deionized water, stir evenly to obtain lye.

[0061] Preparation of ternary complex enzyme: 66g acid cellulase, 30g fructosidase and 26g protease are mixed uniformly to obtain a ternary complex enzyme.

[0062] The preparation of mixed alcohol solution: mix 1450 g of 95% mass fraction of ethanol aqueous solution, 100 g of 75% mass fraction of n-propanol aqueous solution, and 170 g of 82% mass fraction of isopropano...

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Abstract

The invention discloses a method for extracting longan pulp polysaccharide. The method comprises the following steps of (1) slurrying and slurry treatment: mixing fresh longan pulp and purified water, pouring a mixture into a homogenizer for slurrying, adding alkali liquor and activating at -4 to 10 DEG C for 10-12 hours to obtain an activated liquid; (2) enzymolysis and concentrating treatment: adjusting the pH value of filtrate, adding a copper oxide-zirconium oxide catalyst and ternary complex enzyme to filtrate, carrying out enzymolysis under the condition of 200-500W of microwave irradiation and then carrying out ultra-filtration concentration on enzymatic hydrolysate obtained through enzymolysis; (3) centrifugal treatment: mixing a concentrated liquid and a mixed alcohol solution, and collecting an educt by adopting a centrifugal machine; and (4) spray drying treatment. An alkali liquor low-temperature activating enzyme association technology is introduced into an extraction preparation process of the longan polysaccharide; the yield of a target product is obviously improved in comparison with a conventional technology; and meanwhile, the method has the characteristics of being efficient, fast, low in cost and suitable for massive industrial production.

Description

[0001] 【Technical Field】 [0002] The invention relates to the field of deep processing of longan, in particular to a method for extracting polysaccharides from longan flesh. [0003] 【Background technique】 [0004] Longan is the fruit of Sapindus family, also known as longan, which is a famous subtropical fruit in my country. Longan is native to the southern subtropical regions of southern my country and northern Vietnam. It has been cultivated in my country for more than 2,000 years. It is an important southern subtropical evergreen long-lived fruit tree. In history, it is called "longan" in the south and "ginseng" in the north. Longan fruits are best-selling at home and abroad and enjoy a high reputation in the international market. my country's longan cultivation area and yield rank first in the world. Fujian, Guangdong, Guangxi and Taiwan are the main producing areas, and Hainan, Yunnan, Sichuan and Guizhou are also cultivated. [0005] Longan polysaccharides are generally browni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00
CPCC08B37/0003C08B37/006
Inventor 何雪梅孙健李丽刘国明李昌宝郑凤锦盛金凤唐雅园李杰民零东宁
Owner GUANGXI ZHUANG AUTONOMOUS REGION ACAD OF AGRI SCI
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