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Method for preparing xylose and hydrolyzed protein by treating distiller's grains with subcritical water

A technology of subcritical water and hydrolyzed protein, which is applied in the production, application, and production of sugars, etc., can solve the problems of complicated preparation process, increased production cost, not necessarily reasonable technical and economical, and achieves reasonable technical and economical and shortened reaction time. Effect

Inactive Publication Date: 2015-08-05
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-concentration acid needs to be neutralized with lime milk or calcium carbonate after the reaction, and the generated calcium sulfate is a slightly water-soluble salt, which needs to be removed many times during the xylose extraction process, making the preparation process complicated
Secondly, in some cases, a high liquid-solid ratio is more conducive to the reaction of hydrolysis to prepare xylose, such as 201010259561.5, a method for efficiently separating xylose from brewer's grains, using a liquid-solid ratio of 20:1-80:1 , but the concentration of a large amount of solution will increase the production cost, which may not be reasonable in terms of technology and economy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ⑴ Distiller's grains are hydrolyzed in subcritical water to produce xylose

[0029] The wet distiller's grains after corn fermentation to produce alcohol distilled wine are centrifuged and filtered, 15 grams of dried distiller's grains are taken and placed in a 50 ml hydrothermal reaction kettle, 25 ml of 0.8% (W / W) dilute sulfuric acid is added, and the hydrothermal reaction kettle is sealed. The hydrothermal reaction kettle was placed in an oven and heated to 158° C., and kept warm for 2 hours. Stop heating, take out the hydrothermal reaction kettle, and cool.

[0030] Filter, the filter residue is about 12 grams. The filtrate was neutralized with a small amount of hydroxide-type strongly basic anion exchange resin 201#, neutralized to pH=4, and the supernatant was collected by filtration. The ion exchange resin recovered from each experiment was treated uniformly and reused after regeneration.

[0031] The color of the clear liquid is light yellow, and no activate...

Embodiment 2

[0038] ⑴ Distiller's grains are hydrolyzed in subcritical water to produce xylose

[0039] The wet distiller's grains after corn fermentation to produce alcohol distilled wine are centrifuged and filtered, 15 grams of dried distiller's grains are taken and placed in a 50 ml hydrothermal reaction kettle, 25 ml of 0.4% (W / W) dilute hydrochloric acid is added, and the hydrothermal reaction kettle is sealed. The hydrothermal reaction kettle was placed in an oven and heated to 180°C, and kept for 1.5 hours. Stop heating, take out the hydrothermal reaction kettle, and cool.

[0040] Filter, the filter residue is about 11.6 grams. The filtrate was neutralized with a small amount of hydroxide-type strongly basic anion exchange resin 201#, neutralized to pH=4, and the supernatant was collected by filtration. The ion exchange resin recovered from each experiment was treated uniformly and reused after regeneration.

[0041] The color of the supernatant was yellow, about 27 milliliters...

Embodiment 3

[0047] ⑴ Distiller's grains are hydrolyzed in subcritical water to produce xylose

[0048] The wet distiller's grains after corn fermentation to produce alcohol distilled wine are centrifugally filtered, 50 grams of dried distiller's grains are taken and placed in a 500 ml autoclave, and 250 ml of water is added to seal the autoclave. Introduce carbon dioxide gas to remove the air in the reactor. The reaction kettle was heated to 150°C, and carbon dioxide gas was added to make the pressure reach 3MPa. Pressure-holding and heat-retaining reaction for 2 hours. Stop heating, cool to room temperature, let off carbon dioxide gas, and open the reaction kettle.

[0049] Filter, the filter residue is about 42 grams. The color of the clear liquid is light yellow, and no activated carbon is added for decolorization. Due to the small amount of experimental solution, nanofiltration membrane cannot be used for concentration, so it is directly concentrated by vacuum distillation with a ...

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PUM

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Abstract

The invention provides a method for preparing xylose and a hydrolyzed protein by treating distiller's grains by utilizing subcritical water, belonging to the technical field of fine chemicals. The method comprises the following steps: fermenting corns and centrifugally filtering wet distiller's grains after distilling liquor; catalytically hydrolyzing the dry distiller's grains after filtration with a low-concentration acid in the subcritical water to prepare xylose; centrifugally filtering hydrolysis residues and the wet distiller's grains, merging a clear liquid and catalytically degrading the merged clear liquid with the lower-concentration acid in the subcritical water to prepare the hydrolyzed protein. By adopting the method, using acid and base in quantity in the reaction process is avoided, the reaction time is simultaneously shortened and the treatment cost is lower.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a method for preparing xylose and hydrolyzed protein from distiller's grains. Background technique [0002] There are many alcohol and liquor manufacturers in my country, and the output of distiller's grains is very large. Distiller's grains are currently mainly used as animal feed. Studies have shown that adding a certain amount of distiller's grains to the diet can promote animal growth and increase the output rate of animal products. However, the nutrients in distiller's grains vary greatly, and contain anti-nutritional factors such as lignin and phytic acid and mycotoxins, which limit its large-scale use in animal diets. Therefore, how to efficiently utilize distiller's grain biomass resources is an urgent problem to be solved for winemaking enterprises to achieve circular development. Effective development and utilization of distiller's grains can n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K13/00C07K1/12
Inventor 刘启民葛彦侠程桂茹
Owner CHANGCHUN UNIV OF TECH
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