Xylose production and purification process

A xylose and process technology, applied in the refined field of xylose production, can solve the problems of high acid and alkali consumption in resin regeneration, serious environmental pollution, and large amount of ion exchange resin, so as to shorten the production cycle, simplify the process flow, and reduce production cost effect

Active Publication Date: 2010-09-08
鹤岗市经纬糖醇有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a purification and purification process for xylose production, to solve the complex process, many equipment, large amount of ion exchange resin, high acid-base consumption of resin regeneration, large waste water discharge, serious environmental pollution, etc. in the prior art. Problems such as large steam consumption, high cost, and long production cycle

Method used

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Examples

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Embodiment

[0019] 1. Put 250ml of gel-type anion exchange resin 201×4 into a jacketed, Φ24×1200mm glass exchange column, and then regenerate it with 3.0% sodium hydroxide solution at a flow rate of 1400ml / h. The water is washed at a flow rate of 1400ml / h until the pH value of the outlet is 8, and the washing liquid is clarified; the xylose decolorization solution at 30°C is passed through the resin bed at a flow rate of 500ml / h, the exchange volume is 3000ml, and the pH value of the exchange liquid is 5.1.

[0020] 2. Put 150ml of gel-type cation exchange resin Ambeilite IR120 and 150ml of macroporous anion-exchange resin D301 into jacketed, Φ24×600mm glass exchange columns respectively to form positive and negative columns in series, gel-type cation-exchange resin Ambeilite IR120 is regenerated countercurrently with 5% hydrochloric acid solution at a flow rate of 480ml / h. After regeneration, wash with pure water at a flow rate of 480ml / h to pH 5, and the washing solution is clarified; ma...

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Abstract

The invention relates to a xylose production and purification process which belongs to the technical field of functional sugar production, and comprises the following steps that: (1) ion exchange is carried out to destaining solution in xylose production through an ion exchange column filled with gel-type anion exchange resin; (2) xylose solution after treatment in step (1) is beaten into a series column which comprises gel-type cation exchange resin and macroporous anion exchange resin; (3) the xylose solution after treatment in step (2) passes through a mixed bed exchange column which comprises anion and cation exchange resin; and (4) after treatment, a crystal xylose product is obtained through evaporation, concentration, centrifugation and drying procedures. The xylose production and purification process changes a traditional two-step purification into one-step purification, changes traditional step evaporation and concentration into centralized evaporation and concentration, simultaneously removes a one-step activated carbon decoloring procedure, simplifies the process, shortens the production cycle, reduces the production cost of xylose, adopts a mixed bed technology, ensures that the pH value of the exchange fluid to be 6.5 to 7.0, has lighter color after evaporation and concentration, and fully meets the requirements of xylose crystallization and separation.

Description

technical field [0001] The invention belongs to the technical field of functional sugar production and relates to a refining method for xylose production. Background technique [0002] The production of xylose products is based on agricultural waste such as corncobs, bagasse, cottonseed husks, etc., after pretreatment - hydrolysis - neutralization - decolorization - primary purification - primary evaporation concentration - secondary purification Purification - secondary evaporation concentration - crystallization - centrifugation - drying and other processes to produce white crystals, which produce a large number of impurity ions, pigments, colloids and other substances during the production process, seriously affecting the quality and quality of xylose production The improvement of the yield must be removed in the process. The traditional method of removing impurity ions, pigments, colloids and other substances is to use an ion exchange (cation resin-anion resin-cation res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H3/02C07H1/06B01J47/02B01J47/028
Inventor 王星云张念强王成福杜瑞锋
Owner 鹤岗市经纬糖醇有限公司
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