Continuous ion exchange system for xylose production and using method thereof

A continuous ion exchange system technology, which is applied in the field of continuous ion exchange system for xylose production, can solve the problems of large amount of regenerant and purified water, large manual operation error, and low utilization rate of resin, so as to reduce the regeneration of chemical reagents The effect of dosage, reducing environmental protection pressure and improving product yield

Pending Publication Date: 2020-07-28
ZHEJIANG HUAKANG PHARMA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common ion exchange process is a fixed bed separation and desalination process. The manual operation error is large, and it is easy to run out of materials,

Method used

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  • Continuous ion exchange system for xylose production and using method thereof
  • Continuous ion exchange system for xylose production and using method thereof
  • Continuous ion exchange system for xylose production and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1, the production and refining of decolorizing liquid

[0047] Please refer to figure 2 As shown, the xylose decolorizing solution to be treated by ion exchange has a refractive index of 8%, a light transmittance of 60%, and an electrical conductivity of 8000 μs / cm.

[0048] The two groups of ion exchange resins are macroporous strong acid cation exchange resin and macroporous weak base anion exchange resin respectively, and the feed flow is controlled at 5m 3 / h, the flow direction of feed liquid is negative column production 3 (A6) → negative column production 2 (A5) → negative column production 1 (A4) → positive column production 3 (C6) → positive column production 2 (C5) → positive column Column production 1 (C4) → transfer tank → negative column refining 2 (A3) → negative column refining 1 (A2) → positive column refining 2 (C3) → positive column refining 1 (C2) → collection tank. Finally, the xylose liquid after ion exchange treatment has a refractive...

Embodiment 2

[0055] Embodiment 2, the regeneration process of ion exchange column

[0056] First, water is passed into the resin column in the backwash stage, and the used resin is backwashed to remove suspended impurities. At the same time, the purified water is changed from rinsing 3 (A16 / C16) → rinsing 2 (A15 / C15) → rinsing 1 (A14 / C14) → regeneration 3 (A13 / C13) → regeneration 2 (A12 / C12) → regeneration 1 ( A11 / C11) is used for sequential column-string cleaning. Since the cleaning runs in the column-string, the concentration of the regenerant in the cleaning water will gradually be the highest, which is to reuse the original regenerant in the column. After the column of elution 3 (A16 / C16) is cleaned, the regenerant is regenerated from the sequence of regeneration 3 (A13 / C13) → regeneration 2 (A12 / C12) → regeneration 1 (A11 / C11). In the regeneration process, the regenerant uses 3% hydrochloric acid solution and 3% sodium hydroxide solution.

[0057] Converting the amount of acid and a...

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Abstract

The invention relates to a continuous ion exchange system for xylose production. The system comprises a plurality of cation exchange resin columns, a plurality of anion exchange resin columns, a connecting pipeline, an automatic control valve and an automatic control system, the connecting pipeline comprises an ion blow-off main pipe, a purified water main pipe, a regenerant main pipe, a production main pipe, a refining main pipe, a sweet water main pipe, a production material string column header pipe, a refined material string column header pipe, a transfer string column pipeline and a string column pipeline, the plurality of cation exchange resin columns and the plurality of anion exchange resin columns respectively form a water jacking group, a refining group, a production group, a sugar jacking group, a backwashing group, a regeneration group and a leaching group which move in sequence and operate circularly, and an automatic control system periodically controls each group of ionexchange resin columns through an automatic control valve to realize the production, refining, sugar ejection of water, water ejection of sugar, backwashing, leaching and regeneration processes. A using method of the system is also disclosed. The consumption of a regenerant and purified water is reduced, the sewage discharge amount is small, and the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of ion exchange treatment, and particularly relates to a continuous ion exchange system for xylose production and a method for using the same. Background technique [0002] Xylose is the most abundant five-carbon sugar in nature, and widely exists in the hemicellulose of natural plants in the state of polycondensation. Xylose can be obtained by degrading xylan with acid or enzymes. The majority of xylose production enterprises in northern my country mainly use corn cob as raw material, and the production methods include dilute acid hydrolysis and enzymatic hydrolysis. At present, the commonly used method is dilute acid hydrolysis. As a natural product, under the catalysis of dilute acid, the hemicellulose in corncob is first hydrolyzed to generate monosaccharides such as D-xylose, L-arabinose, glucose and galactose. At the same time, the corncob entrains a large amount of inorganic salts in the production ...

Claims

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Application Information

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IPC IPC(8): B01J47/026B01J49/09B01J49/60C13K13/00
CPCB01J47/026B01J49/09B01J49/60C13K13/002C13K13/007
Inventor 李哲马强江雪松郑晓阳陈红卫杨艳军张为宏
Owner ZHEJIANG HUAKANG PHARMA
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