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Method and device for extracting xylose from viscose fiber waste

A viscose fiber and waste technology, applied in the field of xylose extraction, can solve the problems of large input of raw materials and equipment, inability to popularize and utilize, and high requirements for corrosion resistance, and achieve the effect of reducing steam loss.

Pending Publication Date: 2018-09-21
河南豫鑫糖醇有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The direct raw material of this method is the waste lye of pressing that contains alkali and hemicellulose, and the raw material added in the processing process of lignin is 98.5% concentrated sulfuric acid, 95% industrial ethanol, and the cost is very high in the whole process, leading to the inability to promote the use of the technology
[0005] In the prior art 201410622101.2, a membrane concentration process for producing xylitol with viscose fiber squeeze liquid as raw material is disclosed. This scheme is directly aimed at the generation of waste lye in viscose fiber production. In the hemicellulose liquid raw material, Contains a large amount of spent alkali and salt, and needs to be neutralized with a large amount of acid. When hydrolyzing hemicellulose, the pH is controlled at 0, and the hydrolysis acidity is relatively high. The subsequent treatment and filtration process requires high corrosion resistance of the equipment, and the produced There are many waste acids, the purity of xylitol obtained is also low, the input of raw materials and equipment is large, the comprehensive cost is high, and the economic benefit is low

Method used

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  • Method and device for extracting xylose from viscose fiber waste
  • Method and device for extracting xylose from viscose fiber waste
  • Method and device for extracting xylose from viscose fiber waste

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Embodiment 1

[0049] Such as Figure 1-5 Shown, a kind of method extracting xylose from viscose waste material, comprises the steps:

[0050] Step (1) pulping

[0051] Add dilute sulfuric acid in the mixing tank 1, then slowly add the solid viscose fiber waste into the mixing tank 1, and keep stirring to make it mix evenly with the dilute sulfuric acid. The mass ratio of solid waste in the mixing tank 1: sulfuric acid: water is 15:3:82;

[0052] Step (2) Hydrolysis

[0053] The slurry obtained in step (1) is injected into the hydrolysis pot 2 through the circulating pump 18, and steam is continuously fed into the hydrolysis pot 2 to heat up, and the temperature in the hydrolysis pot 2 is controlled at 110±5°C, and the pressure in the hydrolysis pot 2 is controlled at 0.08MPa , the hydrolysis time was controlled at 2 hours, and the circulating pump 18 was started during the hydrolysis process to extract and enter the slurry circulation from the hydrolysis pot 2;

[0054] Step (3) neutral...

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Abstract

The invention belongs to the technical fields of waste resource recovery and xylose production, and in particular relates to a method and a device for extracting xylose from viscose fiber waste. The method comprises the following steps: (1) carrying out size mixing; (2) hydrolyzing; (3) neutralizing; (4) carrying out primary decolorization; (5) carrying out cation and anion exchange; (6) carryingout primary evaporation and concentration; (7) carrying out secondary decolorization; (8) carrying out secondary evaporation and concentration; (9) crystallizing, and carrying out centrifugal separation. The method is simple in process, mild in conditions, low in requirements for equipment, high in xylose recovery rate and less in amount of produced waste water, thus having a wide promotional value.

Description

technical field [0001] The invention belongs to the technical field of waste recycling and xylose production, and in particular relates to a method and a device for extracting xylose from viscose fiber waste. Background technique [0002] Xylose is a reducing sugar with the molecular formula C5H10O5. The sweetness of xylose is 72% of that of sucrose, which is close to the sweetness of glucose. It can improve the flavor and taste of sweets and inhibit odor. In the presence of a catalyst, xylose can be hydrogenated and reduced to generate xylitol, which can be used as a raw material for xylitol. Xylose has good food compatibility, and it can easily produce Maillard reaction during mixing with amino acids during heating. Fragrance effect. Xylose also has good health care functions, can activate bifidobacteria in the human intestinal tract and promote growth, improve the micro-ecological environment of the human body, and improve the body's immunity. Xylose is an important ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13K13/00
CPCC13K13/002
Inventor 黄庆峰魏坤城张松茂李照家付锋熙雷天埌郑学东
Owner 河南豫鑫糖醇有限公司
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