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Membrane Concentration Process for Production of Xylitol Using Viscose Fiber Press Liquid as Raw Material

A viscose fiber and squeezing liquid technology, applied in xylose production, sugar derivatives, sugar derivatives and other directions, can solve the problems of low concentration temperature of nanofiltration membrane and low membrane filtration efficiency, achieve low cost and ensure filtration efficiency , The effect of high process operation efficiency

Active Publication Date: 2015-10-28
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanofiltration membrane concentration temperature of this process is low, and the membrane filtration efficiency is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The membrane concentration process of producing xylitol with viscose fiber squeeze liquid as raw material, the specific process steps are as follows:

[0046] A. Membrane concentration

[0047] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the microfiltration membrane for treatment. The permeate is concentrated twice through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and then sent to the ceramic membrane for filtration. , the obtained concentrated solution is the concentrated solution of squeezed lye; the nanofiltration membrane is concentrated twice in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water.

[0048] B. Extract semi-fiber

[0049] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0050] C. Hydrolysis

[0051] Add dil...

Embodiment 2

[0057] The membrane concentration process of producing xylitol with viscose fiber squeeze liquid as raw material, the specific process steps are as follows:

[0058] A. Membrane concentration

[0059] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the microfiltration membrane for treatment. The permeate is concentrated 3 times through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and then sent to ceramic membrane for filtration. , the resulting concentrated solution is the concentrated solution of the squeezed lye; the nanofiltration membrane is concentrated 3 times in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water.

[0060] B. Extract semi-fiber

[0061] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0062] C. Hydrolysis

[0063] Ad...

Embodiment 3

[0069] The membrane concentration process of producing xylitol with viscose fiber squeeze liquid as raw material, the specific process steps are as follows:

[0070] A. Membrane concentration

[0071] The pressed lye produced by viscose fiber is pre-filtered to remove large particles of impurities, and then enters the microfiltration membrane for treatment. The permeate is concentrated 4 times through the nanofiltration membrane cycle, and the last concentrated solution is diluted with water and then sent to the ceramic membrane for filtration. , the resulting concentrated solution is the concentrated solution of the squeezed lye; the nanofiltration membrane is concentrated 4 times in circulation, and before each filtration, the feed liquid enters the nanofiltration membrane after being diluted with water.

[0072] B. Extract semi-fiber

[0073] Add acid to neutralize the concentrated solution of the squeezed lye to obtain a semi-fiber liquid.

[0074] C. Hydrolysis

[0075...

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Abstract

The invention provides a membrane concentration technology for producing xylitol by using viscose fiber pressed liquor as raw materials. The technology comprises the following specific steps: A, membrane concentration: the pressed liquor produced by viscose fibers is firstly processed in a pre-filter manner to remove impurities with large particles to enter a micro-filter membrane to be processed, the penetrated liquor is concentrated two to four times in a circulating manner through a nano filter film, the final concentrated liquor is diluted by adding the water to be sent into a ceramic membrane to be filtered, and the obtained concentrated liquor is the concentrated liquor of the pressed alkali liquor; the nano filter membrane is concentrated two to four times in a circulating manner, and before filtration each time, the material liquor is diluted by adding the water to enter the nano filter film; B, semi fiber extraction: the acid is added into the concentrated liquor of the pressed alkali liquor to neutralize to obtain semi fiber liquor; C, hydrolysis: dilute sulphuric acids are added into the semi fiber liquor to carry out the hydrolysis; D, purification: the hydrolysis liquor is filtered through the ceramic membrane, the penetrated liquor enters the nano filter membrane to be desalted, and the concentrated liquor is decolored through active carbon to obtain the purified liquor; E, hydrogenation: the hydrogen is communicated into the purified liquor of xylose, and the hydrogenation is carried out on the basis of the catalysis of nickel to obtain the xylitol.

Description

technical field [0001] The invention relates to the field of xylitol preparation, in particular to a membrane concentration process for producing xylitol by using viscose fiber squeeze liquid as raw material. Background technique [0002] The sweetness of xylitol is equivalent to sucrose, and the heat is equivalent to glucose. Xylitol can adjust the abnormality of sugar metabolism and is a nutritional and therapeutic agent for diabetics. Xylitol has a strong anti-ketone body effect and can be used to rescue patients with ketone bodies. Xylitol can slow down the production of fatty acids in plasma, but it will not increase blood sugar. It is also a liver-protecting drug for patients with hepatitis. Xylitol has good thermal stability and does not produce chemical reactions when heated together with amino acids. It can be formulated with amino acids in various preparations as nutraceuticals. As a food, xylitol also has a special anti-caries function. However, xylitol is one ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/18C07C29/141
CPCC07C29/141C07H1/06C13K13/002C07C31/18
Inventor 邓传东冯涛孙毅唐孝兵莫世清周林罗红梅
Owner YIBIN GRACE GROUP CO LTD
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