Ion exchange system and method for improving xylitol ion exchange efficiency

A xylitol and dissociation technology, applied in the direction of ion exchange column/bed method, ion exchange adjustment/control, separation/purification of hydroxyl compounds, etc., can solve unfavorable production, high cost, low utilization rate of ion exchange column, etc. To solve the problem, to achieve the effect of full utilization of resin, improved utilization rate, and reduction of the number of regeneration and rinsing

Pending Publication Date: 2021-01-08
ZHEJIANG HUAKANG PHARMA
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

This method requires frequent regeneration, rinsing and replacement of ion-exchange columns, which is costly and has a low utilization rate of ion-exchange columns, which is not conducive to production

Method used

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  • Ion exchange system and method for improving xylitol ion exchange efficiency

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Embodiment 1

[0024] The first method embodiment of improving xylitol detachment efficiency of the present invention uses the detachment system for improving xylitol detachment efficiency as described above, comprising the following steps:

[0025] Step 1, open the centrifugal pump 4 and the first pneumatic butterfly valve 81 in the first ion exchange pipeline 71, close the pneumatic butterfly valve 8 in the other ion exchange pipeline 7, and temporarily store the xylose in the decolorization tank 1 The alcohol decolorizing liquid enters the ion exchange liquid tank 2 for temporary storage after passing through the first ion exchange column assembly 91 to complete the separation process. An on-line pH meter 5 and an on-line conductivity meter 6 arranged on the connecting pipeline 3 monitor the pH value and conductivity of the ion-exchange liquid flowing through.

[0026] Step 2. When it is detected that the pH value of the ion-exchange liquid passing through the first ion-exchange column co...

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Abstract

The invention relates to an ion exchange system for improving xylitol ion exchange efficiency, wherein the system comprises a decolorizing liquid tank, an ion exchange liquid tank and a connecting pipeline, xylitol decolorizing liquid is temporarily stored in the decolorizing liquid tank, xylitol ion exchange liquid is temporarily stored in the ion exchange liquid tank, and a centrifugal pump andan online pH instrument are respectively connected in series on the connecting pipeline. at least three ion exchange pipelines are arranged on the connecting pipeline between the centrifugal pump andthe online pH instrument in parallel, and a pneumatic butterfly valve and an ion exchange column for combination are respectively arranged on each ion exchange pipeline in series. The invention also discloses a method for improving xylitol ion exchange efficiency by using the ion exchange system. The utilization rate of the ion exchange columns is improved, and the replacement frequency of the ionexchange columns is reduced.

Description

technical field [0001] The invention belongs to the technical field of xylitol preparation, in particular to a separation system and method for improving the separation efficiency of xylitol. Background technique [0002] The ion exchange process in the xylitol production process is to remove residual nickel ions and other ions in the process of catalytic hydrogenation of xylitol, and to adjust the pH of the ion exchange liquid. In the existing ion exchange process, after the xylitol decolorization process, a group of "yang-yin" or two groups of "yang-yin-yang-yin" ion exchange columns are connected in series to perform the ion exchange process. In order to allow the ion exchange columns to repeat In order to ensure that the pH of the xylitol ion-exchange liquid is qualified, it is necessary to replace the ion-exchange column with a new regenerated one when the pH of the ion-exchange liquid is less than or equal to 5. ion exchange column. This method requires frequent rege...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J47/02B01J47/14C07C29/76C07C31/18
CPCB01J47/02B01J47/14C07C29/76C07C31/18
Inventor 徐开蕾蔡澄亮沈峰安延龙胡惜明高思晗周伟霞
Owner ZHEJIANG HUAKANG PHARMA
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