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A method for extracting l-arabinose from xylose mother liquor

A technology of xylose mother liquor and arabinose, which is applied in the direction of chemical instruments and methods, monosaccharides, sugar derivatives, etc., can solve the problems of small output, low yield, limited popularization and use, etc., and achieve large output and simple process Effect

Active Publication Date: 2016-01-20
陈培豪
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the L-arabinose in the methanol crystallization mother liquor and the ethanol crystallization mother liquor cannot be separated and recovered, so the yield is not high, and the highest is only 50% of the theoretical yield, so the cost is relatively high
[0005] Owing to adopt existing method to produce L-arabinose not only output is small but also cost remains high, thus has limited the popularization and use of this functional sugar with good health care function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dilute the xylose mother liquor and add dry yeast to Saccharomyces cerevisiae until the glucose is fully fermented, remove the yeast cells with a butterfly centrifuge, heat to 60°C and decolorize with activated carbon for 45 minutes, and then remove the activated carbon with a filter press to obtain sugar The liquid is concentrated into a syrup with a refractive sugar content of 82% by vacuum distillation, and the syrup is transported to a crystallizer and inserted with crystal seeds, and then cooled and crystallized. During the crystallization process, samples were taken for microscopic examination. At the beginning of crystallization, there was only one crystal with a very uniform size, and new crystals appeared after a period of time. Crystal-like particles, that is, large-grained crystals and small-grained crystals. Put the crystal slurry into the three-legged sedimentation centrifuge, first settle down and collect the large crystals at a low speed, which is crude x...

Embodiment 2

[0022] The crystallization mother liquor obtained by centrifuging the magma in Example 1 is re-distilled under reduced pressure to obtain a syrup with a refractive sugar content of 85%. The syrup is transported to a crystallizer and inserted with crystal seeds, and then cooled and crystallized. During the crystallization process, samples were taken for microscopic examination. At the beginning of crystallization, there was only one crystal with a very uniform size, and new crystals appeared after a period of time. Crystal-like particles, that is, large-grained crystals and small-grained crystals. Add crystal slurry to filter centrifuge to filter crystallization mother liquor, and obtain mixed crystallization powder containing large-grained crystals and small-grained crystals.

[0023] Get this mixed crystalline powder and mix with 10 times of 95% ethanol and stir evenly, continuously add in the horizontal spiral unloading sedimentation centrifuge, adjust the rotating speed and...

Embodiment 3

[0025] The mixed crystalline powder obtained by centrifugation in Example 2 is mixed with 5 times of dehydrated alcohol and stirred evenly, and continuously added to a cross-flow classifier, the flow medium is also dehydrated ethanol, and large-particle crystals and small-particle crystals are collected respectively. The purity of crude xylose in granular crystals is 87%, and the purity of crude L-arabinose in small crystals is 68%. Then, the large and small crystals are recrystallized with water to obtain pure xylose and pure L-arabinose respectively. sugar.

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Abstract

The invention provides a method for extracting L-arabinose from xylose mother liquor. The method includes fermentation, purification and concentration of xylose mother liquor. The granules crystallize to give L-arabinose. The method realizes the separation of xylose and L-arabinose through simple particle classification, and lays the foundation for large-scale production of L-arabinose.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for extracting L-arabinose from xylose mother liquor. Background technique [0002] L-arabinose is a versatile five-carbon sugar that exists mainly in the form of polymers in plant hemicellulose. The dry matter of higher plants generally contains about 20-35% hemicellulose, and hemicellulose is mainly composed of xylose and L-arabinose. In addition, L-arabinose also exists in a large amount in plant gums such as gum arabic. Due to the huge yield of hemicellulose, xylose and L-arabinose can be produced in large quantities by hydrolyzing hemicellulose in higher plants. [0003] The hemicellulose hydrolyzate contains a variety of monosaccharides, mainly xylose, as well as glucose, L-arabinose, galactose and so on. Since most of the monosaccharides in the hemicellulose hydrolyzate are xylose, xylose crystallization can be separated by crystallization until the xylose cann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H3/02C07H1/06
CPCC07H1/06C07H3/02
Inventor 陈培豪
Owner 陈培豪
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