Method for preparing xylooligosaccharide by using corn straw cores

A corn stover and xylo-oligosaccharide technology, which is applied in the field of xylo-oligosaccharides, can solve the problems of high equipment requirements, cumbersome processes, and reduce the yield of xylo-oligosaccharides, and achieves that the equipment requirements are not strict, the operation process is simple and convenient. The effect of industrial production

Active Publication Date: 2020-06-26
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of preparing xylo-oligosaccharides, acid hydrolysis and hot water extraction methods require high equipment, cumbersome processes, and even produce some by-products, thereby reducing the yield of xylo-oligosaccharides

Method used

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  • Method for preparing xylooligosaccharide by using corn straw cores

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Selecting dry, mold-free corn stalks for dehulling and peeling to obtain corn stalk pith, cutting the pith into small pieces and pulverizing into powder with a grinder for later use.

[0032] 2) Take the crushed corn stalk pith core powder, add 0.5% hydrogen peroxide solution with a mass fraction of 0.5% sodium hydroxide solution according to the solid-liquid ratio of 1:10 (g / mL), and adjust the pH value to 11. The reaction temperature is 60°C, and the reaction time is 2 hours. Suction filtration was carried out after the reaction, and the filtrate was collected to obtain a pretreatment liquid.

[0033] 3) Desalting and pH adjustment of the pretreatment solution in step 2): use 732 type cation exchange resin and D301-FD type anion exchange resin in series, the volume ratio of anion and cation resins is 2:1, and the operating temperature is 50 °C, the pH is 6.0, and the time is 60 minutes.

[0034] 4) Evaporate the solution to one-third of the original volume with a...

Embodiment 2

[0039] 1) Selecting dry, mold-free corn stalks for dehulling and peeling to obtain corn stalk pith, cutting the pith into small pieces and pulverizing into powder with a grinder for later use.

[0040] 2) Take the pulverized corn stalk core powder, add 1.5% hydrogen peroxide solution with a mass fraction of 1.5% sodium hydroxide solution according to the solid-liquid ratio of 1:20 (g / mL), and adjust the pH value to 11.6, the reaction temperature is 70°C, and the reaction time is 4h. Suction filtration was carried out after the reaction, and the filtrate was collected to obtain a pretreatment liquid.

[0041] 3) Desalting and pH adjustment of the pretreatment solution in step 2): use 732 type cation exchange resin and D301-FD type anion exchange resin in series, the volume ratio of anion and cation resins is 2:1, and the operating temperature is 50 °C, the pH is 6.0, and the time is 60 minutes.

[0042] 4) Rotate the solution in step 2) with a rotary evaporator, evaporate the...

Embodiment 3

[0047] 1) Selecting dry, mold-free corn stalks for dehulling and peeling to obtain corn stalk pith, cutting the pith into small pieces and pulverizing into powder with a grinder for later use.

[0048] 2) Take the pulverized corn stalk pith core powder, add a 2% hydrogen peroxide solution with a mass fraction of 2% according to the solid-liquid ratio of 1:25, adjust the pH value to 11.6 with a 2% sodium hydroxide solution, and react The temperature is 75°C and the reaction time is 4h. Suction filtration was carried out after the reaction, and the filtrate was collected to obtain a pretreatment liquid.

[0049]3) Desalting and pH adjustment of the pretreatment solution in step 2): use 732 type cation exchange resin and D301-FD type anion exchange resin in series, the volume ratio of anion and cation resins is 2:1, and the operating temperature is 50 °C, the pH is 6.0, and the time is 60 minutes.

[0050] 4) Rotate the solution in step 3) with a rotary evaporator, evaporate th...

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Abstract

The invention relates to the field of xylooligosaccharide, in particular to a method for preparing xylooligosaccharide by using corn straw cores. The raw materials used in the method are corn straw cores, alkaline hydrogen peroxide is used to carry out prehydrolysis to remove lignin, then hydrolysate is subjected to desalting and pH environment adjustment, and finally hydrolyzation is further carried out by an enzymatic hydrolysis method to obtain a xylooligosaccharide solution. In order to further improve the purity of xylooligosaccharide, purification treatment is carried out by adopting activated carbon combined with decolorization resin. The method is simple in preparation process, mild in reaction and environmentally friendly, the obtained xylooligosaccharide is high in purity and high in yield, the use amount of enzyme is small in a subsequent enzymatic hydrolysis method, and the cost is saved.

Description

technical field [0001] The invention relates to the field of xylooligosaccharides, in particular to a method for preparing xylooligosaccharides from corn stalk pith. Background technique [0002] Agricultural and forestry biomass materials such as corn stalks, wheat stalks, corncobs, bagasse, straw, bamboo, etc., have potential utilization value in many aspects. Some countries have made great achievements in using these biomass by-products to manufacture high value-added products. my country is a large agricultural country, and corn is one of the food crops in my country, which has abundant resources. Corn stalk husks are widely used in the fields of glulam and particleboard, but the resulting pith has not been fully utilized. Using corn stalks as raw materials to develop some new uses, such as the production of functional xylooligosaccharides, not only makes full use of corn stalks, but also increases farmers' income, which is very promising. [0003] Xylo-oligosaccharid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/12C12P19/04C12P19/00
CPCC12P19/00C12P19/04C12P19/12C12P19/14
Inventor 时君友潘晴徐文彪
Owner BEIHUA UNIV
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