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Application of modified resin in process of boron removal

A modified resin and removal technology, applied in the direction of adsorption water/sewage treatment, etc., can solve the problems of resin stability acid pollution, resin service life reduction, etc., achieve low equipment requirements, improve service life, and good boron removal ability Effect

Inactive Publication Date: 2015-06-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong binding force between polyhydroxyl and borate ions, corrosive strong acids must be used as eluents during resin regeneration.
During this process, the service life of the resin is greatly reduced, and some new problems, such as cost, resin stability, and acid pollution, also follow

Method used

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  • Application of modified resin in process of boron removal
  • Application of modified resin in process of boron removal
  • Application of modified resin in process of boron removal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: hydroxyl protection reaction

[0020]

[0021] Add 3,4-dinitrobenzaldehyde in a round bottom flask, dissolve in acetone, add chloromethyl methyl ether and potassium carbonate, protect with argon, react at room temperature for 17h, filter under reduced pressure, wash with ethyl acetate , collect the filtrate, steam it, pass through the column, collect the main product (white solid), evaporate it by rotary steam, and set aside.

Embodiment 2

[0022] Embodiment 2: side chain synthesis reaction

[0023]

[0024] Add methylamine to the product in Example 1, stir and react at room temperature for 15 minutes, add sodium borohydride several times in small amounts under ice bath, remove the ice bath, stir and react at room temperature for 1 hour, add distilled water, and distill to remove methanol, dichloro Extracted with methane, dried the organic phase with anhydrous sodium sulfate, filtered, and the filtrate was rotary evaporated, and the product (yellow oil) was set aside.

Embodiment 3

[0025] Embodiment 3: Resin linkage reaction

[0026]

[0027] Dissolve the product in Example 2 in dimethyl sulfoxide, add resin (Merrifield resin, model G20M1254) and potassium carbonate, react under argon protection at 50°C for 17 hours, filter under reduced pressure, and wash with distilled water and methanol successively Filter cake, collect the filter cake and suspend it in 5% acetic acid (containing sulfuric acid, the molar ratio of compound (4) to sulfuric acid is 10:1) solution, reflux and boil for 15min, cool to room temperature, filter under reduced pressure, and wash the filter cake with distilled water until Neutral, suspend in saturated sodium bicarbonate solution, stir magnetically for 1 hour, filter under reduced pressure, wash the filter cake with distilled water until neutral, rinse the filter cake with methanol, and obtain the modified resin product (6).

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PUM

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Abstract

The invention discloses an application of modified resin in the process of boron removal. The structure of the modified resin is shown by a formula in the specification, wherein R represents macroporous Merrifield resin with the model number of G20M1254. An experiment proves that the modified resin is relatively good in boron removal capacity in an aqueous solution, and the elution condition is mild, so that the service life of the resin is greatly prolonged. Moreover, the application disclosed by the invention is simple and convenient to operate and easy to implement, is low in equipment requirement, can greatly save the cost and has a practical application value. A hydroxyl radical and a benzene ring of a phenolic compound in the structure of the modified resin are positioned on the same plane, so that o-diphenol can be complexed with boric acid smoothly. The boron removal capacity of the modified resin can reach 6.16mg / g, and the environmental pollution caused by the modified resin can be reduced.

Description

technical field [0001] The invention relates to the technical field of adsorption separation, in particular to the application of a modified resin in the boron removal process. Background technique [0002] Boron and its compounds are widely used in industry. In recent years, the reserves of high-quality borate ore have been decreasing with the massive consumption of boron ore resources. At the same time, the environmental problems caused by the discharge of industrial boron-containing wastewater have also One after another. [0003] At present, there are many methods for removing boron from solution, mainly including precipitation (including coagulation and lime softening), adsorption and membrane separation (reverse osmosis and electrodialysis). Among many boron extraction methods, the application of chelating resin for adsorption and deboronation has been widely used because of its good selectivity and high recovery rate. In recent years, chelating resins for boron extr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28
Inventor 郭翔海王伯阳白鹏
Owner TIANJIN UNIV
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