Method for producing xylose by use of xylose mother liquid

A technology of xylose mother liquor and xylose, which is applied in the direction of sugar derivatives, sugar derivatives, sugar derivatives preparation, etc., can solve the problems of high cost, high cost of xylose, difficult xylose crystallization and purification, and achieve an increase in crystallization rate , the effect of reducing production costs

Active Publication Date: 2013-03-13
ANHUI BBCA FERMENTATION TECH ENG RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Xylose is a sweetener, mainly used in the field of food processing. The current domestic xylose production process is to obtain xylose liquid under acid hydrolysis conditions from corncobs or bagasse, and then obtain crystallized xylose after purification. The xylose mother liquor has high miscellaneous sugar content and low xylose purity, so it is difficult to purify the xylose crystals in the mother liquor. In the end, most of the xylose mother liquor is used as a pigment raw material, wasting ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1 Production of high-purity xylose by using xylose mother liquor

[0015] 1.1 Preparation of ionizing liquid and xylose mother liquor

[0016] Using 300kg corncobs as raw material, add dilute sulfuric acid at a solid-to-liquid ratio of 1:5 (weight to volume ratio, kg / L), with a sulfuric acid concentration of 1.0%, and keep warm at 120°C for 2.5 hours. After the reaction, centrifuge to obtain a xylose hydrolyzate, then add calcium carbonate to the hydrolyzate to neutralize and adjust the pH to 3, stir for 15 minutes, and filter after standing for 30 minutes to obtain 1380 L of xylose neutralization solution.

[0017] After the xylose neutralizing solution is warmed up to 60°C, add 0.1% powdered activated carbon (weight to volume ratio kg / L), stir for 15 minutes, and filter after 30 minutes of heat preservation to obtain a decolorizing solution with a light transmittance of 5%; the decolorizing solution is sequentially After the cation exchange column 001*7 and t...

Embodiment 2

[0025] Example 2 Utilize xylose mother liquor to produce high-purity xylose

[0026] The preparation of the clutch liquid and the xylose mother liquor is the same as in Example 1.

[0027] In the xylose mother liquor of 20kg (dry matter concentration 63% in the mother liquor, xylose concentration 36%, glucose concentration 10%, arabinose concentration 13%, polysaccharide concentration 4%), add the xylose separation liquid of 200kg (in separation liquid Dry matter concentration 4.6%, xylose concentration 4.0%, glucose concentration 0.24%, arabinose concentration 0.32%, polysaccharide concentration 0.046%), stirring for 15 minutes, obtaining dry matter concentration is 220kg of mixed sugar liquid of 9.0%, and the light transmittance of sugar liquid is 35%.

[0028] Pass the mixed sugar solution through an organic membrane with a molecular weight cut-off of 0.2kD to obtain 231 kg of membrane filtrate, the dry matter concentration of the filtrate is 7.2%, the light transmittance ...

Embodiment 3

[0030] Example 3 Production of high-purity xylose by using xylose mother liquor

[0031] The preparation of the clutch liquid and the xylose mother liquor is the same as in Example 1.

[0032] In the xylose mother liquor of 20kg (dry matter concentration 63% in the mother liquor, xylose concentration 36%, glucose concentration 10%, arabinose concentration 13%, polysaccharide concentration 4%), add the xylose separation liquid of 50kg (in separation liquid Dry matter concentration 4.6%, xylose concentration 4.0%, glucose concentration 0.24%, arabinose concentration 0.32%, polysaccharide concentration 0.046%), stirring for 15 minutes, obtaining dry matter concentration is 70kg of mixed sugar solution of 21.3%, and the light transmittance of sugar solution is 27%.

[0033] Pass the mixed sugar solution through an organic membrane with a molecular weight cut-off of 0.4kD to obtain 73.5 kg of membrane filtrate, the dry matter concentration of the filtrate is 19.3%, the light trans...

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Abstract

The invention provides a method for producing xylose by use of xylose mother liquid, which comprises the following steps of: adding a certain amount of ion exchange liquid into the xylose mother liquid in xylose production to adjust the concentration of the dry matter of xylose liquid to 10-30%; enabling the mixed xylose liquid to pass through a filter membrane for intercepting 0.1-0.5kD molecular weight to intercept polysaccharide in the mixed xylose liquid and keep small-molecular monosaccharide in the filtrate; processing with a cation exchange column and an anion exchange column so as to control the content of cations and anions in the filtrate below 10ppm; and concentrating and crystallizing to obtain a finished product of xylose. By adding ion exchange liquid into the xylose mother liquid which is hard to crystallize, the purity of xylose in the xylose liquid is improved; the pigment and polysaccharide in the mixed xylose liquid are removed by membrane separation of a filter membrane, and the xylose liquid after the membrane filtration is concentrated; and since the polysaccharide component in the xylose liquid is removed, the xylose mother liquid hard to crystallize is crystallized and purified, the total crystallization rate of xylose is improved by about more than 10%, and the xylose production cost is greatly reduced.

Description

technical field [0001] The invention relates to a production method of xylose, in particular to a method for producing high-purity xylose by using xylose mother liquor. Background technique [0002] Xylose is a sweetener, mainly used in the field of food processing. The current domestic xylose production process is to obtain xylose liquid under acid hydrolysis conditions from corncobs or bagasse, and then obtain crystallized xylose after purification. Because the xylose mother liquor has high miscellaneous sugar content and low xylose purity, it is difficult to purify the xylose crystals in the mother liquor. In the end, most of the xylose mother liquor is used as a pigment raw material, which wastes resources. Generally speaking, the treatment of xylose mother liquor includes two methods. One method is to use chromatographic separation to purify arabinose and xylose, but the cost of chromatographic separation is high. Difficult to handle, resulting in high cost of purified...

Claims

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Application Information

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IPC IPC(8): C07H3/02C07H1/08
Inventor 李荣杰尚海涛潘声龙邓远德杨为华冯杰
Owner ANHUI BBCA FERMENTATION TECH ENG RES
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