A kind of preparation method of high-purity water-insoluble xylan

A water-insoluble, xylan-based technology, applied in the field of food science, achieves the effects of saving use costs, avoiding flammable and explosive risks, and broad application fields

Active Publication Date: 2022-02-18
上海赛普瑞特生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the defects in the prior art, the object of the present invention is to provide a method for preparing high-purity water-insoluble xylan, which does not use organic solvents, greatly saves the cost of using organic solvents, and effectively avoids a large number of The risk of flammability and explosion caused by the use of organic solvents, and it is easy to obtain high-purity xylan products, and high-purity lignin products can also be recycled, which has good economics, feasibility and production safety.

Method used

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  • A kind of preparation method of high-purity water-insoluble xylan

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Effect test

Embodiment 1

[0028] A preparation method of high-purity water-insoluble xylan, comprising the following steps:

[0029] (1) Weigh 10kg of air-dried bagasse without mildew, wash it twice with clean water, and put it into the reaction kettle after centrifugal dehydration.

[0030] (2) Add 100kg of sodium hydroxide solution with a mass concentration of 14%, heat to 60°C for leaching for 3 hours, and perform solid-liquid separation after leaching.

[0031] (3) The residue after solid-liquid separation was repeatedly leached once with 50 kg of sodium hydroxide solution with a mass concentration of 8%, and solid-liquid separation was performed again.

[0032] (4) Combine two lye extracts, filter and clarify with plate and frame, then de-alkalize and concentrate with alkali-resistant ultrafiltration membrane, add water to the concentrated solution to replace ultra-filtration twice, until a small amount of xylan precipitates out, and obtain dealkalization leaching Extract the liquid and recover t...

Embodiment 2

[0038] A preparation method of high-purity water-insoluble xylan, comprising the following steps:

[0039] (1) Weigh 10kg of air-dried bagasse without mildew, wash it twice with clean water, and put it into the reaction kettle after centrifugal dehydration.

[0040] (2) Add 100kg of sodium hydroxide solution with a mass concentration of 14%, heat to 60°C for leaching for 3 hours, and perform solid-liquid separation after leaching.

[0041] (3) The residue after solid-liquid separation was repeatedly leached once with 50 kg of sodium hydroxide solution with a mass concentration of 8%, and solid-liquid separation was performed again.

[0042] (4) Combine two lye extracts, filter and clarify with plate and frame, then de-alkalize and concentrate with alkali-resistant ultrafiltration membrane, add water to the concentrated solution to replace ultra-filtration twice, until a small amount of xylan precipitates out, and obtain dealkalization leaching Extract the liquid and recover t...

Embodiment 3

[0048] A preparation method of high-purity water-insoluble xylan, comprising the following steps:

[0049] (1) Weigh 10kg of air-dried corn cob without mildew, wash it twice with clean water, dehydrate it with a vibrating screen, and then shred it twice with a double-shaft shredder to obtain small corn cob particles, and put the small corn cob particles into the reaction kettle Inside.

[0050] (2) Add 100kg of sodium hydroxide solution with a mass concentration of 14%, heat to 60°C for leaching for 3 hours, and perform solid-liquid separation after leaching.

[0051] (3) The residue after solid-liquid separation was repeatedly leached once with 50 kg of sodium hydroxide solution with a mass concentration of 8%, and solid-liquid separation was performed again.

[0052] (4) Combine two lye extracts, filter and clarify with plate and frame, then de-alkalize and concentrate with alkali-resistant ultrafiltration membrane, add water to the concentrated solution to replace ultra-fi...

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Abstract

The invention discloses a method for preparing high-purity water-insoluble xylan. In the method, the stems and leaves of gramineous plants are used to prepare xylan extraction lye, and then the xylan suspension containing lignin is obtained through dealkalization treatment. The turbid liquid is then heated and dried to make slow rehydration xylan xerogels. Using the slow rehydration and swelling process of xylan xerogels and the rapid dissolution of lignin depolymerized by alkali, the xylan xerogels After the xylan xerogel is pulverized, it is rinsed in flowing pure water to fully remove the embedded lignin before the xylan gel fully swells and breaks to obtain high-purity water-insoluble xylan. The preparation method of the present invention does not use organic solvents, effectively reduces production costs, and is easy to obtain high-purity xylan products, and can also recycle high-purity lignin products, and has good economics, feasibility and production safety. .

Description

technical field [0001] The invention belongs to the field of food science, in particular to a preparation method of high-purity water-insoluble xylan. Background technique [0002] Xylan is the main component of hemicellulose in the cell wall of gramineous plants, accounting for about 1 / 3 of the dry weight of the cell wall. It is a polysaccharide composed of tens to hundreds of xylose molecules connected by β-(1→4) to form the main chain. kind. The 2,3C of the glycosyl of the xylan main chain is usually linked with different glycosyls and non-sugar substituent branched heterogeneous polysaccharides. Xylan is the only five-carbon sugar polymer in nature, and its unique properties have irreplaceable application value in food, chemical and other fields. [0003] Xylan in plant cell walls is highly acetylated and binds to lignin through ester bonds to become a strong support material for plant cell walls. Alkaline hydrolysis removes the acetyl group and breaks the ester bond ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/14C08H7/00
CPCC08B37/0003C08B37/0057C08H6/00
Inventor 张永宁代兴华张永昌卢艺芳李赐玉张厚瑞
Owner 上海赛普瑞特生物科技有限公司
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