A kind of method for preparing xylo-oligosaccharide from hemicellulose

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

Active Publication Date: 2022-07-08
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] The problems existing in the existing method for preparing xylo-oligosaccharides are: intermittent cooking of corncob powder, poor recovery of waste heat steam, evaporators are used for material concentration, high steam consumption, high acid-base consumption due to multiple enzymatic purifications, The cost of decolorization is high, and the amount of sewage discharge is large; the light transmittance of the feed liquid after saccharification is low (5000μs / cm), the solid content is low (<3%), and the production of xylooligosaccharides The maximum purity can only reach about 70%

Method used

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  • A kind of method for preparing xylo-oligosaccharide from hemicellulose
  • A kind of method for preparing xylo-oligosaccharide from hemicellulose
  • A kind of method for preparing xylo-oligosaccharide from hemicellulose

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Embodiment 1

[0035] A method for preparing xylo-oligosaccharides from hemicellulose, comprising the following steps:

[0036] (1) First in the syrup tank (full volume 15m 3 ) Riga process water 12m 3 , and then add 2t hemicellulose powder (water content <15%), add acetic acid to adjust pH to 4.5, heat up to 82°C, stir and mix well; obtain a suspension of hemicellulose powder; adding other acids will affect enzymatic hydrolysis Purity of post-xylo-oligosaccharides.

[0037] Hemicellulose powder can be purchased through commercial channels, and can also be prepared according to conventional methods. In this example, the purchased hemicellulose powder is extracted from the pulping waste liquid of viscose fiber; the hemicellulose content is 85-90%, the moisture content is within 12%, and the ash content is less than 3.5%, the active ingredient high and the impurity content is small.

[0038] (2) Start the conveying pump, convey the suspension of hemicellulose powder obtained in step (1) to...

Embodiment 2

[0051] A method for preparing xylo-oligosaccharides from hemicellulose, comprising the following steps:

[0052] (1) First in the syrup tank (full volume 15m 3 ), add process water, then add hemicellulose powder (water content <15%), the mass ratio of hemicellulose powder and water is 1:6, add acetic acid to adjust pH to 5, heat up to 85 ° C, stir and mix evenly; The suspension of hemicellulose powder is obtained; the hemicellulose powder can be purchased through commercial channels, and can also be prepared according to conventional methods. In this example, the purchased hemicellulose powder is extracted from the pulping waste liquid of viscose fiber; the hemicellulose content is 85-90%, the moisture content is within 12%, and the ash content is lower than 3.5%, and the effective components are high. , the impurity content is small.

[0053] (2) Start the conveying pump, convey the suspension of hemicellulose powder obtained in step (1) to the booster ejector, open the ste...

Embodiment 3

[0067] A method for preparing xylo-oligosaccharides from hemicellulose, comprising the following steps:

[0068] (1) First in the syrup tank (full volume 15m 3 ), add process water, then add hemicellulose powder (water content <15%), the mass ratio of hemicellulose powder and water is 1:6, add acetic acid to adjust pH to 5, heat up to 90 ° C, stir and mix well; The suspension of hemicellulose powder is obtained; the hemicellulose powder can be purchased through commercial channels, and can also be prepared according to conventional methods. In this example, the purchased hemicellulose powder is extracted from the pulping waste liquid of viscose fiber; the hemicellulose content is 85-90%, the moisture content is within 12%, and the ash content is less than 3.5%, the active ingredient high and the impurity content is small.

[0069] (2) Start the conveying pump, convey the suspension of hemicellulose powder obtained in step (1) to the booster ejector, open the steam valve of t...

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Abstract

The invention discloses a method for preparing xylo-oligosaccharide from hemicellulose powder. The raw material adopts hemicellulose powder. First, acid and water are added to stir and mix to form a suspension, and the pH value is adjusted to 4.5-5.5. The ejector passes through the laminar flow tank, and the pressure is quickly released through the vapor-liquid separator. The secondary steam is recovered for the heating of subsequent materials. The liquid enters the saccharification tank, and then adds xylanase and saccharification enzyme after cooling down. The liquid conductivity is low <3000μs / cm, the purity of xylo-oligosaccharide is more than 80%, the product quality is improved, the amount of sewage is greatly reduced, the waste heat of vapor-liquid separation is easy to recover, and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of biochemical industry, in particular to a method for preparing xylo-oligosaccharide from hemicellulose. Background technique [0002] Xylo-oligosaccharides, also known as xylo-oligosaccharides, are functional polymeric sugars composed of 2-7 xylose molecules bound by β-1,4 glycosidic bonds. Compared with the commonly used soybean oligosaccharides, fructooligosaccharides, isomaltose oligosaccharides, etc., it has unique advantages, and it can selectively promote the proliferation activity of intestinal bifidobacteria. Its bifidogenic factor function is 10-20 times that of other polymeric carbohydrates. [0003] The preparation methods of xylo-oligosaccharides usually include the following: [0004] 1. First cook the raw material containing xylan at high temperature, and then further enzymatically decompose to xylan; [0005] 2. The raw materials are directly hydrolyzed by steam, water or dilute inorganic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P19/12C12P19/04C12P19/00C12P19/20C12P19/14C07H3/04C07H3/06C07H1/06C08B37/14
CPCC12P19/12C12P19/04C12P19/00C12P19/20C12P19/14C07H3/04C07H3/06C07H1/06C08B37/0057C08B37/0003C12P2201/00Y02P20/59Y02P20/129
Inventor 包娜莎杨健
Owner 济南茂腾生物科技有限公司
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