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A method for separating xylose and arabinose

A technology of arabinose and xylose, which is applied in the field of chromatographic separation, can solve the problems of unpublished literature and patent reports, etc., and achieve the effects of prolonging the service life, increasing the processing capacity, and widening the process conditions

Active Publication Date: 2018-04-27
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there are no published literature and patent reports on the technical application of using ion exchange fibers as chromatographic fillers for the separation of xylose and arabinose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Preparation of ion-exchange fibers: select strongly acidic ion-exchange fibers with a diameter of 33-40 μm and an exchange capacity of 3.3 mmol / g in a dry state, cut them into short fibers of about 3-10 mm, and soak them in pure water. Excess calcium ions are used to replace it to complete the conversion from hydrogen form to calcium form. In particular, the polystyrene-based functional fiber base material proposed in Chinese patent 201310533240.3 is used to prepare ion exchange fibers through cross-linking reaction and functional modification. Other fiber materials that achieve this function are also acceptable. The processing process can refer to the prior art, typical reference materials such as: F. andJ. Homogeneous and Heterogeneous Sulfonation of Polymers: AReview. Polym. Eng. Sci. 1998, 38(5), 783-792.

[0021] 2) Packing of ion exchange fibers: Soak the ion exchange fibers that have been converted into calcium form in pure water, and pack them in the col...

Embodiment 2

[0025] 1) Preparation of ion-exchange fibers: select strongly acidic ion-exchange fibers with a diameter of 33-40 μm and an exchange capacity of 3.3 mmol / g in a dry state, cut them into short fibers of about 3-10 mm, and soak them in pure water. Excess calcium ions are used to replace it to complete the conversion from hydrogen form to calcium form. Adopt the ion exchange fiber material of embodiment 1.

[0026] 2) Packing of ion exchange fibers: Soak the ion exchange fibers that have been converted into calcium form in pure water, and pack them in the column length compression method. The packing density of the fibers is 500g / L, and the packing diameter-to-height ratio is 1:70.

[0027] 3) Separation of xylose mother liquor: 60°Bx xylose mother liquor, in which the concentrations of xylose and arabinose are 31.1% and 14.1%, respectively. Take the sugar solution with 3.5% volume of the filler, pass through the ion exchange fiber column at 26°C at a flow rate of 1BV / h for adso...

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Abstract

The invention relates to a xylose and arabinose separating method using ion exchange fiber as chromatographic packing, the ion exchange fiber is used as the chromatographic separation packing for separation and preparation of high purity xylose and arabinose from xylose crystallization mother liquor, the ion exchange fiber is strong acidic ion exchange fiber, the diameter at dry state is 8-170 mum, cation exchange capacity is 2.0-4.3mmol / g, and before being used for separation of the xylose crystallization mother liquor, the replacement of calcium ions is performed in advance for the conversion from hydrogen type to calcium type. Compared with the ion exchange granular resin chromatographic column, the strong acid ion exchange fiber shows more excellent separation precision and higher production efficiency.

Description

technical field [0001] The invention relates to a process for separating and preparing high-purity xylose and arabinose from xylose crystallization mother liquor by using strongly acidic ion exchange fiber as a new chromatographic filler, belonging to the technical field of chromatographic separation. Background technique [0002] At present, the domestic xylose production process is to obtain xylose liquid from corn cob or bagasse under the condition of acid hydrolysis. During the xylose crystallization process, due to the high miscellaneous sugar content, a large amount of xylose in the crystallization mother liquor is difficult to crystallize, and the final xylose Most of the crystallization mother liquor is used as low-cost processing of pigment raw materials, and its utilization value is very low. Since the physical and chemical properties of several monosaccharides in the xylose crystallization mother liquor are very similar, it is difficult to separate and purify them...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H3/02B01D15/36
CPCB01D15/362C13K13/00C13K13/002C13K13/007
Inventor 林晓陆剑鸣张丽方
Owner NANJING TECH UNIV
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