Method for removing colloid in xylitol solution by utilizing carbon dioxide gas

A carbon dioxide and xylitol technology, applied in the field of xylitol production, can solve the problems affecting the purity and quality of xylitol crystals, unsatisfactory removal of impurities, and limited application space, etc., to achieve obvious removal of impurities, crystal growth and Create fast and cost-effective results

Inactive Publication Date: 2019-01-25
河南豫鑫糖醇有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its low natural content and high production cost, its application space is greatly limited.
In industrial production, xylitol is mainly prepared by hydrogenation of xylose, and xylose is generally obtained from lignocellulosic corncobs or wood through acid hydrolysis, separation and purification, but because corncobs or wood often contain crude protein, Crude fat, soil, sand or lignin (belonging to aromatic compounds), resins, volatile oils, tannins, pectin and other substances, so these substances tend to remain in the xylitol solution during acid hydrolysis In the process, colloidal impurities such as silicic acid or silicate are formed. As the xylitol liquid enters the next process, the concentration of these substances will increase with the increase in the concentration of the xylitol liquid during the evaporation and concentration process, which seriously affects the follow-up process. Crystalline Purity and Quality of Xylitol
[0004] At present, activated carbon adsorption, anion and cation exchange resins, filter aid filtration or 0.45 micron precision filtration are often used in actual production to remove silicic acid or silicate and lignin (belonging to aromatic compounds) in xylitol liquid. , resin, volatile oil, tannin, pectin and other colloidal impurities, but there are often disadvantages such as complex process, cumbersome operation, high cost, and unsatisfactory impurity removal effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing colloid in xylitol solution by utilizing carbon dioxide gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for removing colloids in xylitol solution with carbon dioxide gas, comprising the following steps:

[0021] (1) getting calcium oxide dissolved in water to make massfraction is 20% milk of lime;

[0022] (2) Take a xylitol solution with a concentration of 30% and heat it at 60° C. for 2 hours, then add the milk of lime prepared above to adjust the pH of the xylitol solution to 9.5 to obtain a mixed solution a;

[0023] (3) Pass CO into the mixed solution a 2 Gas, stirred at a stirring speed of 30r / min for 6h to make it fully dissolved until the pH value of the mixed solution a was 6.5, stop feeding CO 2 gas, then stand still for 25 minutes, filter to obtain the precipitate, and centrifuge the precipitate at a speed of 6000r / min for 35 minutes to obtain a xylitol solution.

[0024] (4) Detect the viscosity of the original xylitol solution and the xylitol solution prepared above in Table 1.

Embodiment 2

[0026] A method for removing colloids in xylitol solution with carbon dioxide gas, comprising the following steps:

[0027] (1) getting calcium oxide dissolved in water to make massfraction is 25% milk of lime;

[0028] (2) Take a xylitol solution with a concentration of 35% and heat it at 65° C. for 1.5 h, then add the milk of lime prepared above to adjust the pH value of the xylitol solution to 11 to obtain a mixed solution a;

[0029] (3) Pass CO into the mixed solution a 2 Gas, stirred at a stirring speed of 40r / min for 5h to make it fully dissolved until the pH value of the mixed solution a was 7.5 and stopped feeding CO 2 gas, then stand still for 40 minutes, filter to obtain the precipitate, and centrifuge the precipitate at a speed of 8000r / min for 20 minutes to obtain a xylitol solution.

[0030] (4) Detect the viscosity of the original xylitol solution and the xylitol solution prepared above in Table 1.

Embodiment 3

[0032] A method for removing colloids in xylitol solution with carbon dioxide gas, comprising the following steps:

[0033] (1) getting calcium oxide dissolved in water to make massfraction is 30% milk of lime;

[0034] (2) Take a xylitol solution with a concentration of 40% and heat it at 70° C. for 1.2 h, then add the milk of lime prepared above to adjust the pH value of the xylitol solution to 10 to obtain a mixed solution a;

[0035] (3) Pass CO into the mixed solution a 2 Gas, stirred at a stirring speed of 45r / min for 4.5h to make it fully dissolved until the pH value of the mixed solution a was 7, stop feeding CO 2 gas, then stand still for 30 minutes, filter to obtain a precipitate, and centrifuge the precipitate at a speed of 7000r / min for 30 minutes to obtain a xylitol solution.

[0036] (4) Detect the viscosity of the original xylitol solution and the xylitol solution prepared above in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the technical field of production of xylitol and discloses a method for removing colloid in a xylitol solution by utilizing carbon dioxide gas. The method comprises the following steps: (1) dissolving calcium oxide into water to prepare lime milk; (2) carrying out heating treatment on the xylitol solution and then adding the prepared lime milk to adjust the pH (Potential of Hydrogen) value of the xylitol solution, so as to obtain a mixed solution a; (3) introducing CO2 gas into the mixed solution a and stirring to sufficiently dissolve; regulating the pH value of the mixed solution a; then standing and reacting, filtering and centrifuging and separating to obtain the xylitol solution. The method disclosed by the invention has the advantages of simple technology, low cost, obvious impurity removal effect, strong stability and easiness in operation and large-scale production; compared with traditional activated carbon adsorption or cation and anion resin exchangeresin purification methods and the like, the content of colloid impurities in the xylitol solution can be effectively improved and the subsequent purification cost of xylitol is reduced.

Description

technical field [0001] The patent of the invention relates to the technical field of xylitol production, in particular to a method for removing colloids in xylitol solution with carbon dioxide gas. Background technique [0002] With the rapid development of social economy and the continuous improvement of people's living standards, the problems of environmental pollution and energy shortage are becoming more and more serious, and people's requirements for energy conservation and environmental protection are also getting higher and higher. Lignocellulosic raw materials are extremely abundant and cheap renewable resources in nature. How to extract and recycle their active components to realize the rational utilization of resources has become the focus of research. [0003] As we all know, xylitol is a five-carbon sugar alcohol, a functional natural sweetener. In nature, it widely exists in various fruits, vegetables, and grains. It can not only adjust abnormal glucose metabol...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): A23L5/20A23L29/30
CPCA23V2002/00A23L5/276A23L29/37A23V2250/11A23V2250/6422
Inventor 郭效鹏黄庆峰张海彦魏坤城
Owner 河南豫鑫糖醇有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products