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Method for preparing xylooligosaccharide from corn bran

A technology of xylooligosaccharides and corn husks, which is applied in the preparation of oligosaccharides and sugar derivatives, chemical instruments and methods, etc. It can solve the problems of poor recovery of waste heat steam, large sewage discharge, and low light transmittance of feed liquid, etc. problems, to achieve the effect of reducing acid and alkali consumption, reducing the amount of sewage, and convenient recovery of waste heat

Active Publication Date: 2021-03-09
济南茂腾生物科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, the existing problems are: intermittent cooking of corn cob flour, waste heat steam is not easy to recover, and evaporators are used for material concentration, high steam consumption, many Sub-enzymatic purification leads to high acid and alkali consumption, high decolorization cost, and large sewage discharge; the material liquid after saccharification has low light transmittance (5000μs / cm), and low solid content (<3 %), and the maximum purity of producing xylooligosaccharides can only reach about 70%

Method used

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  • Method for preparing xylooligosaccharide from corn bran
  • Method for preparing xylooligosaccharide from corn bran
  • Method for preparing xylooligosaccharide from corn bran

Examples

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Embodiment 1

[0034] A method for preparing xylooligosaccharides from corn bran, comprising the following steps:

[0035] (1) First in the syrup tank (full volume 25m 3 ) Riga process water 18m 3 , then add 2t of corn bran (water content<12%), add acid to adjust the pH to 4.5, heat up to 80°C, stir and mix evenly; obtain the suspension of corn bran; in the present embodiment, the acid added is acetic acid, add Other acids will affect the purity of xylo-oligosaccharides after enzymatic hydrolysis. Corn husks can be purchased commercially. The moisture content of the corn hulls is 10%, and the ash content is lower than 2%. In this embodiment, the ash content is 1%.

[0036] (2) Start the conveying pump, deliver the suspension of corn bran obtained in step (1) to the booster injector, open the steam valve of the booster injector simultaneously, steam heat the material, and ensure that the steam pressure of the injector is at 0.6 MPa, keep the temperature of the material at 160°C, then tran...

Embodiment 2

[0048] A method for preparing xylooligosaccharides from corn bran, comprising the following steps:

[0049] (1) First in the syrup tank (full volume 25m 3 ), then add corn bran (water content<12%), the mass ratio of corn bran to water is 1:9, add acid to adjust pH to 5, heat up to 85°C, stir and mix evenly; obtain corn bran Suspension: In this embodiment, the acid added is acetic acid, adding other acids will affect the purity of xylo-oligosaccharides after enzymatic hydrolysis. Corn husks can be purchased commercially. The moisture content of corn hulls is 8%, and the ash content is lower than 2%. In this embodiment, the ash content is 0.5%.

[0050] (2) Start the conveying pump, convey the suspension of corn husks obtained in step (1) to the booster injector, open the steam valve of the booster injector at the same time, steam heat the material, and then transport the material to the laminar flow tank , to ensure that the vapor pressure of the ejector is at 0.7MPa, to kee...

Embodiment 3

[0063] A method for preparing xylooligosaccharides from corn bran, comprising the following steps:

[0064] (1) First in the syrup tank (full volume 25m 3 ), then add corn bran (water content<12%), the mass ratio of corn bran to water is 1:10, add acid to adjust pH to 5.5, heat up to 90°C, stir and mix evenly; obtain corn bran Suspension: In this embodiment, the acid added is acetic acid, adding other acids will affect the purity of xylo-oligosaccharides after enzymatic hydrolysis. Corn husks can be purchased commercially. The moisture content of the corn hulls is 5%, and the ash content is lower than 2%. In this embodiment, the ash content is 0.5%.

[0065] (2) Start the conveying pump, convey the suspension of corn husks obtained in step (1) to the booster injector, open the steam valve of the booster injector at the same time, steam heat the material, and then transport the material to the laminar flow tank , ensure that the vapor pressure of the ejector is at 0.7MPa, ke...

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Abstract

The invention discloses a method for preparing xylooligosaccharide from corn bran. Corn barn is adopted as a raw material, acetic acid and water are added into the corn bran, a suspension is obtainedafter stirring and mixing, the pH value is regulated to 4.5-5.5, then the suspension is input into a pressurized ejector through a pump and then passes through a laminar flow tank, the pressure is quickly released through a gas-liquid separator, secondary steam is recovered for heating subsequent materials, a liquid enters a saccharifying tank, xylanase and saccharifying enzyme are added after cooling, the light transmittance of the saccharified feed liquid is larger than or equal to 3%, the conductivity is low (smaller than 3000 [mu]s / cm), the solid content is 3-5%, the purity of the xylooligosaccharide is larger than 70%, the product quality is improved, the sewage amount is greatly reduced, waste heat of vapor-liquid separation is convenient to recover, and energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, and in particular relates to a method for preparing xylo-oligosaccharides from corn bran. Background technique [0002] Xylooligosaccharides, also known as xylooligosaccharides, are functional polymeric sugars formed by combining 2-7 xylose molecules with β-1,4 glycosidic bonds. Compared with soybean oligosaccharides, fructooligosaccharides, and isomaltose oligosaccharides commonly used by people, it has unique advantages, and it can selectively promote the proliferation activity of intestinal bifidobacteria. Its bifidus factor function is 10-20 times that of other polysaccharides. [0003] The preparation method of xylo-oligosaccharide usually has the following kinds: [0004] 1. First cook the xylan-containing raw materials with high temperature, and then further enzymatically hydrolyze them into xylo-oligosaccharides; [0005] 2. Directly use steam, water or dilute inorganic ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/20C12P19/14C12P19/12C12P19/04C12P19/00C07H3/04C07H3/06C07H1/06C08B37/14
CPCC12P19/20C12P19/14C12P19/12C12P19/04C12P19/00C07H3/04C07H3/06C07H1/06C08B37/0057C08B37/0003Y02P20/10Y02P20/50Y02P20/59Y02P20/129
Inventor 包娜莎杨健
Owner 济南茂腾生物科技有限公司
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