Preparation technology of selective resin for removing trace nitrate ion in water

A nitrate ion and preparation process technology, applied in the field of selective resin preparation technology, can solve problems such as unsatisfactory nitrate removal effect and poor removal effect, and achieve high selectivity, improved pore structure, and large exchange rate. The effect of capacity

Inactive Publication Date: 2012-10-03
ZIBO DONGDA HONGFANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal effect of the existing ion exchange resins on nitrate is not ideal, especially when the content of nitrate ions in water is small, the removal effect is relatively poor.

Method used

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  • Preparation technology of selective resin for removing trace nitrate ion in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Polymerization: Add 600 parts of pure water to a 2-liter polymerization reactor, add 3 parts of gelatin, 24 parts of magnesium sulfate, and 16 parts of sodium carbonate in sequence under stirring conditions, then raise the temperature to 50°C, and add 3 parts of methine Blue, stop stirring, add the oil phase mixed by 70 parts of styrene, 30 parts of divinylbenzene, 65 parts of toluene, 60 parts of white oil, and 0.7 parts of benzoyl peroxide. Close the reaction kettle, start stirring, adjust the particle size of the liquid beads to 0.125-0.8mm, raise the temperature to 79°C, keep it warm for 2 hours, raise the temperature to 85°C, keep it warm for 4 hours, raise the temperature to 95°C, and keep it warm for 6 hours. Wash, dry and sieve to obtain white balls of 0.315-0.71mm.

[0031] 2) Chloromethylation: Add 100 parts of white ball and 500 parts of chloromethyl ether prepared in step 1) into a 2-liter reactor, and after swelling for 1.5 hours, add anhydrous zinc chlo...

Embodiment 2

[0034] 1) Polymerization: Add 500 parts of pure water to a 2-liter polymerization reactor, and then add 3.5 parts of polyvinyl alcohol, 30 parts of disodium hydrogen phosphate, and 15 parts of trisodium phosphate under stirring conditions, then raise the temperature to 50 ° C, add 2 parts of methylene blue, stop stirring, add the oil phase mixed by 75 parts of styrene, 25 parts of divinylbenzene, 70 parts of toluene, 60 parts of isobutanol, and 0.8 parts of azobisisobutyronitrile. Close the reaction kettle, start stirring, adjust the particle size of the liquid beads to 0.125-0.8mm, raise the temperature to 79°C, keep it warm for 2 hours, raise the temperature to 85°C, keep it warm for 4 hours, raise the temperature to 95°C, and keep it warm for 6 hours. Wash, dry and sieve to obtain white balls of 0.315-0.71mm.

[0035] 2) Chloromethylation: Add 100 parts of white ball and 400 parts of chloromethyl ether prepared in step 1) into a 2-liter reactor, and after swelling for 1 hou...

Embodiment 3

[0038] 1) Polymerization: Add 600 parts of pure water to a 2-liter polymerization reactor, add 4 parts of polyvinyl alcohol, 30 parts of magnesium sulfate, and 20 parts of sodium carbonate in turn under stirring conditions, then raise the temperature to 50°C, and add 4 parts of Methylene blue, stop stirring, add the oil phase mixed by 75 parts of styrene, 30 parts of divinylbenzene, 75 parts of benzene, 70 parts of white oil, and 1 part of benzoyl peroxide. Close the reaction kettle, start stirring, adjust the particle size of the liquid beads to 0.125-0.8mm, raise the temperature to 79°C, keep it warm for 2 hours, raise the temperature to 85°C, keep it warm for 4 hours, raise the temperature to 95°C, and keep it warm for 6 hours. Wash, dry and sieve to obtain white balls of 0.315-0.71mm.

[0039] 2) Chloromethylation: Add 100 parts of white ball and 600 parts of chloromethyl ether prepared in step 1) into a 2-liter reactor, after swelling for 3 hours, add anhydrous zinc chlor...

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Abstract

The invention discloses a preparation technology of selective resin for removing trace nitrate ion in water and belongs to the field of preparation of organic high-molecular compound. The technology comprises the steps of respectively adding a water phase including purified water, a dispersing agent and a auxiliary dispersing agent and an oil phase including styrene, divinylbenzene, porogen and initiator to a polymerization reactor, carrying out suspension polymerization, and preparing the selective resin by chloromethylation and amination, wherein the porogen is mixed porogen prepared from 65-75 parts of toluene or benzene and 60-70 parts of white oil or isobutanol. By adopting the resin prepared from the mixed porogen, a hole structure inside the resin is improved, and the resin not only has proper specific surface area, but also has larger exchange capacity, and can remove the nitrate ion in the water by physical adsorption and chemical exchange methods at the same time, so that the selectivity on the nitrate ion is larger and trace nitrate ion in the water can be effectively removed.

Description

technical field [0001] The invention belongs to the field of preparation of organic polymer compounds, and in particular relates to a preparation process of a selective resin for removing trace nitrate ions in water. Background technique [0002] With the improvement of people's living standards, the safety requirements for drinking water are getting higher and higher. When the content of nitrate in drinking water is 90-140mg / l, it may cause the baby to suffer from methemoglobinemia, which will make the red blood cells unable to carry oxygen and cause the baby to suffocate. In view of the hazards of nitrate, environmental protection organizations in various countries have limited the maximum concentration of nitrate in drinking water. The United States Environmental Protection Agency stipulates that the maximum concentration of nitrate in drinking water shall not exceed 10mg / l; the EU stipulates that the maximum concentration of nitrate in drinking water shall not exceed 11...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F8/32C08F8/24C02F1/42C02F1/58
Inventor 邓福星王家伟周小会高光迎
Owner ZIBO DONGDA HONGFANG CHEM
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