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Clean regeneration process for ion exchange fiber material

A technology of ion exchange fiber and process, applied in the field of functional polymer materials, can solve the problems of sucrose production system pollution, increase production cost, cost increase, etc., and achieve the effects of low cost, pollution avoidance and high regeneration rate

Inactive Publication Date: 2012-06-20
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the waste liquid after regeneration needs to be treated with a large amount of acid or alkali to neutrality, resulting in waste of reagents and increased costs. At the same time, the application of materials in food, medical and other industries is subject to certain restrictions.
For example, the traditional method used for decolorization of sucrose is bound to bring pollution to the sucrose production system, and also imposes corrosion resistance requirements on equipment, increasing production costs

Method used

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  • Clean regeneration process for ion exchange fiber material
  • Clean regeneration process for ion exchange fiber material
  • Clean regeneration process for ion exchange fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.5 g of polypropylene-based cation exchange fibers into a weighing bottle, and vacuum-dry to constant weight. Alternately soak the material with 0.5mol / L sodium hydroxide and 0.5mol / L hydrochloric acid to activate the functional groups. Soak the pretreated fiber material in 50 mL of a 1.0% solution containing calcium and magnesium ions in a stoppered Erlenmeyer flask, and vibrate at 30° C. for 2 hours in a constant temperature oscillator. Filter out the exchanged fiber material, measure the concentration of calcium and magnesium ions in the solution before and after soaking by titration, and calculate the amount of calcium and magnesium ions adsorbed and exchanged per gram of fiber. Rinse the fibers until neutral, soak them in 50 mL of 10.0% food-grade NaCl solution prepared in advance, add hydrochloric acid to adjust the food-grade NaCl solution to pH 6, and shake in a constant temperature oscillator at 70°C for 1 hour. Titrate the concentration of calcium and ...

Embodiment 2

[0021] Weigh 0.5 g of polyacrylonitrile-based cation exchange fibers into a weighing bottle, and vacuum-dry to constant weight. Alternately soak the material with 0.5mol / L sodium hydroxide and 0.5mol / L hydrochloric acid to activate the functional groups. Soak the pretreated fiber material in 50 mL of a 1.0% solution containing calcium and magnesium ions in a stoppered Erlenmeyer flask, and vibrate at 30° C. for 2 hours in a constant temperature oscillator. Filter out the exchanged fiber material, measure the concentration of calcium and magnesium ions in the solution before and after soaking by titration, and calculate the amount of calcium and magnesium ions adsorbed and exchanged per gram of fiber. Rinse the fiber until it is neutral, soak it in 50 mL of 15.0% food-grade NaCl solution prepared in advance, add hydrochloric acid to adjust the food-grade NaCl solution to pH 5, and shake it in a constant temperature oscillator at 90°C for 1 hour. Titrate the concentration of ca...

Embodiment 3

[0023] Weigh 0.5 g of polypropylene-based cation exchange fibers into a weighing bottle, and vacuum-dry to constant weight. Alternately soak the material with 0.5mol / L sodium hydroxide and 0.5mol / L hydrochloric acid to activate the functional groups. Soak the pretreated fiber material in 50 mL of a 1.0% solution containing calcium and magnesium ions in a stoppered Erlenmeyer flask, and vibrate at 30° C. for 2 hours in a constant temperature oscillator. Filter out the exchanged fiber material, measure the concentration of calcium and magnesium ions in the solution before and after soaking by titration, and calculate the amount of calcium and magnesium ions adsorbed and exchanged per gram of fiber. Rinse the fibers until neutral, soak them in 20.0% 50mL food-grade NaCl solution prepared in advance, add hydrochloric acid to adjust the food-grade NaCl solution to pH 5, and shake in a constant temperature oscillator at 70°C for 1 hour. Titrate the concentration of calcium and magn...

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Abstract

The invention relates to a clean regeneration process for an ion exchange fiber material, and belongs to the technical field of functional polymer materials. The clean regeneration process adopts solution of food-grade sodium chloride to perform regeneration treatment on an ion exchange material, can realize the clean regeneration of the ion exchange fiber material by adjusting regeneration conditions such as concentration, time and the like, ensure that the regeneration rate reaches 90%-98%, can solve the problems of reagent waste, cost increase and the like because in the conventional regeneration process, alkali (NaOH) or acid (HCl) is used as a regenerant, and waste liquor after the regeneration needs to be treated to be neutral by a large amount of acid or alkali further, can also avoid the pollution on an application system and the corrosion on equipment, has the advantages of readily available raw materials, convenient operation and lower cost at the same time, and provides advantageous conditions for the industrialization of the ion exchange fiber material, particularly for the application in industries such as food industry, medical industry, sucrose industry and the like.

Description

technical field [0001] The invention relates to a regeneration technology, in particular to a technology for regenerating ion-exchange materials by using food-grade sodium chloride solution to realize clean regeneration of ion-exchange fiber materials, and belongs to the technical field of functional polymer materials. Background technique [0002] Ion exchange fiber material is a new type of fiber material with novel functions such as ion exchange and adsorption, chemical reaction catalysis, and biological activity after ion exchange resin. Compared with ion exchange resin, it has the characteristics of large specific surface area, fast exchange and elution speed, easy regeneration, various application forms, can be used in liquid phase and gas phase, almost no swelling in solution, and small fluid resistance. It has been widely used in the purification of pharmaceutical components, nuclear wastewater and industrial sewage treatment, waste gas and poisonous gas treatment, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J49/00B01J49/50
Inventor 张其坤雷步增
Owner SHANDONG NORMAL UNIV
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