Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of defluorination anion exchange resin and its preparation and regeneration method

A technology of anion exchange column and exchange resin, applied in the direction of ion exchange regeneration, ion exchange column/bed method, anion exchanger material, etc., can solve the problem of poor mechanical properties and kinetic conditions of materials, high cost of fluorine removal, and fluorine removal Low capacity and other problems, to achieve the effect of low price, superior reaction kinetics conditions, and strong fluorine removal ability

Active Publication Date: 2022-03-08
WATER RESOURCES RES INST OF SHANDONG PROVINCE +1
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a fluoride-removing anion exchange resin and its preparation and regeneration method to solve the problems of high fluoride removal cost, weak fluoride removal ability, poor material mechanical properties and kinetic conditions and serious secondary pollution in the regeneration process in the prior art , using anion exchange resin as a carrier, overcomes the Donnan effect, and provides a new fluorine removal material with high capacity, good mechanical properties and dynamic conditions, simple regeneration and environmental protection

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
  • A kind of defluorination anion exchange resin and its preparation and regeneration method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] A kind of preparation method of defluoridation anion exchange resin provided by the invention comprises the following steps:

[0035] (1) Prepare a first modified salt solution and a second modified salt solution, wherein: the first modified salt solution is an amphoteric metal salt solution, and the second modified salt solution is a mixed solution of an organic solvent and a metal salt solution.

[0036] (2) Filling the filter column with anion exchange resin to prepare an anion exchange column.

[0037] (3) passing an excess of the first modified salt solution in the anion exchange column prepared in step (2), so that the anion exchange resin reaches an equilibrium state.

[0038] (4) Use deionized water to rinse the anion exchange column prepared in step (3) to make the anion exchange resin neutral.

[0039] (5) In the anion-exchange column prepared in step (4), the anion-exchange resin reaches an equilibrium state by passing an excess of the second modified salt s...

Embodiment 1

[0043] The preparation method of a kind of defluorination anion exchange resin that present embodiment 1 provides, comprises the following steps:

[0044] (1) prepare the AlCl of mass percent concentration 10% 3 solution as the first modified salt solution. Prepare the NaCl solution of 10% mass percent concentration, and add 5% dehydrated alcohol (volume ratio) wherein, the mixed solution of formation is as the second modified salt solution

[0045] (2) Filling the filter column with the macroporous chlorine-type anion exchange resin to prepare the anion exchange column.

[0046] (3) In the anion exchange column prepared in step (2), the anion exchange resin reaches an equilibrium state by passing an excess of the first modified salt solution, that is, the concentration of a certain ion in the influent and effluent remains unchanged.

[0047] (4) Use deionized water to rinse the anion exchange column prepared in step (3) to make the anion exchange resin neutral.

[0048] (5...

Embodiment 2

[0050] The preparation method of another kind of fluoride-removing anion exchange resin provided in this embodiment 2 comprises the following steps:

[0051] (1) prepare the ZnSO of 5% of mass percent concentration 4 solution as the first modified salt solution. Prepare 10% NaHCO in mass percent concentration 3 solution, and add 20% methanol (volume ratio) therein, the mixed solution of formation is as the second modified salt solution

[0052] (2) Filling the filter column with the macroporous chlorine-type anion exchange resin to prepare the anion exchange column.

[0053] (3) In the anion exchange column prepared in step (2), the anion exchange resin reaches an equilibrium state by passing an excess of the first modified salt solution, that is, the concentration of a certain ion in the influent and effluent remains unchanged.

[0054] (4) Use deionized water to rinse the anion exchange column prepared in step (3) to make the anion exchange resin neutral.

[0055] (5) In...

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 discloses a defluorination anion exchange resin and a preparation and regeneration method thereof, wherein the preparation method comprises the following steps: (1) preparing a first modified salt solution, a second modified salt solution, and a first modified salt solution is an amphoteric metal salt solution, and the second modified salt solution is a mixed solution of an organic solvent and a metal salt solution; (2) filling the filter column with anion exchange resin to obtain an anion exchange column; (3) in step (2) obtained (4) Use deionized water to rinse the anion exchange column obtained in step (3) to make the anion exchange resin neutral; (5) Passing an excess of the second modified salt solution in the anion exchange column prepared in step (4) to make the anion exchange resin reach an equilibrium state to obtain a defluorinated anion exchange resin.

Description

technical field [0001] The invention relates to the technical field of sewage and tap water treatment, in particular to a fluoride-removing anion exchange resin and a preparation and regeneration method thereof. Background technique [0002] Fluorine is one of the essential trace elements for the human body. Adults need 1.0-1.5 mg of fluorine per day, and the fluorine content in people's daily drinking water should not exceed 0.6 mg / L. Excessive fluoride in drinking water has a serious negative impact on human health. Drinking water with excessive fluoride for a long time will lead to problems such as dental fluorosis and bone fluorosis. High concentrations of fluoride ions in irrigation water can inhibit crop metabolism, photosynthesis and respiration, resulting in reduced yield. At the same time, irrigation with high-fluorine water can also lead to soil pollution. A high concentration of fluoride ions in industrial water will corrode metals, glass, and silicon-containing...

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 Patents(China)
IPC IPC(8): B01J41/08B01J47/016B01J47/02B01J49/57C02F1/42C02F101/14
CPCB01J41/08B01J47/016B01J47/02B01J49/57C02F1/42C02F2001/422C02F2101/14
Inventor 卜庆伟高印军张凌晓李宏鹏李金泽唐漪宋美华左玉娜刘建民郭文平
Owner WATER RESOURCES RES INST OF SHANDONG PROVINCE