Primary diamido chelating resin and preparation method thereof

A chelating resin and double-primary amine-based technology, which is applied in the field of double-primary amine-based chelating resin and its preparation, can solve the problems of insufficient selectivity of the resin, and achieve simple synthesis methods, easy-to-obtain preparation raw materials, and high adsorption selectivity Effect

Active Publication Date: 2013-05-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of insufficient resin selectivity during the treatment of heavy metal wastewater in the prior art, the invention provides a kind of bis-primary amine-based chelating resin and a preparation method thereof. The chelating resin prepared by the preparation method has a certain spatial structure, And the bis-primary amine group on the resin has a special adsorption selectivity for copper ions

Method used

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  • Primary diamido chelating resin and preparation method thereof
  • Primary diamido chelating resin and preparation method thereof
  • Primary diamido chelating resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (a) Suspension polymerization

[0034] Add a certain amount of dilute sodium hydroxide solution to the styrene monomer or directly filter the monomer through a resin column equipped with a strong base anion exchange resin to remove the polymerization inhibitor.

[0035]In a 1000mL beaker, add 210g styrene, 26g divinylbenzene, and 140g liquid paraffin, stir well and set aside.

[0036] In a 1000mL three-neck flask, add 600g of distilled water and raise the temperature to 40°C, then add 6g of gelatin, stir until completely dissolved, and at the same time raise the temperature to 50°C, add 2mL of methylene blue, stir well, add the above-mentioned styrene, divinylbenzene and liquid Add the initiator benzoyl peroxide 4.0g to the wax mixture; adjust the stirring speed to make the oil droplet size appropriate, gradually raise the temperature to 80°C at a speed of 1°C / 6min, keep it warm for 4 hours, and then gradually raise the temperature to 85°C Keep warm for 3 hours, keep w...

Embodiment 2

[0045] The synthetic steps of another embodiment of the present invention are as follows:

[0046] (a) Suspension polymerization

[0047] Using styrene as a monomer, divinylbenzene as a crosslinking agent, using No. 200 solvent oil as a porogen, polyvinyl alcohol as a dispersant, and benzoyl peroxide as an initiator, the suspension polymerization method is used to synthesize low Cross-linked macroporous polystyrene-divinylbenzene copolymer, steam distillation is used to remove the porogen remaining in the resin channels, and then air-dried to obtain low-crosslinked macroporous polystyrene-divinylbenzene resin, namely White ball.

[0048] Wherein the amount of cross-linking agent is 4% of the total amount of monomer and cross-linking agent, the amount of porogen is 40% of monomer weight, and the initiator accounts for 0.5% of the total amount of monomer, cross-linking agent and porogen. The dosage of the agent is 1% of the weight of the monomer, the volume of the extraction s...

Embodiment 3

[0057] The synthetic steps of another embodiment of the present invention are as follows:

[0058] (a) Suspension polymerization

[0059] Styrene is used as a monomer, divinylbenzene is used as a crosslinking agent, liquid wax is mixed with No. 200 solvent oil in a mass ratio of 1:1 as a porogen, polyvinyl alcohol is used as a dispersant, and benzoyl peroxide is used as a dispersant. Initiator, using the suspension polymerization method to synthesize macroporous polystyrene-divinylbenzene copolymer with low crosslinking degree, steam distillation is used to remove the porogen remaining in the resin channel, and then air drying is used to obtain macroporous polystyrene with low crosslinking degree Polystyrene-divinylbenzene resin, that is, white balls.

[0060] Wherein the amount of cross-linking agent is 12% of the total amount of monomer and cross-linking agent, the amount of porogen is 60% of monomer weight, and the initiator accounts for 2% of the total amount of monomer, ...

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Abstract

The invention discloses primary diamido chelating resin and a preparation method thereof and belongs to the field of chelating resin waste water treatment. A constitutional unit of the primary diamido chelating resin is as follows as shown in the specification. The chelating resin has a certain space structure, and primary diamido groups of the resin has special adsorptive selectivity to copper ions.

Description

technical field [0001] The invention belongs to the field of chelating resin wastewater treatment, and more specifically relates to a bis-primary amino-based chelating resin and a preparation method thereof. Background technique [0002] Amine chelating resins are a kind of chelating resins coordinated by nitrogen atoms, including polyvinylamine resins, pyridine resins, etc. Among them, polyvinylamine resin is a kind of resin that has been widely studied. It forms a stable complex through the interaction between the lone pair of electrons on nitrogen and heavy metal ions. It is suitable for efficient separation and recovery of heavy metal ions in the solution, and is used in environmental protection and industrial wastewater. , hydrometallurgy and other aspects have a wide range of application value. The currently reported polyvinylamine chelating resins have a large adsorption capacity for metal ions, but the adsorption selectivity for specific ions in the mixed components...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F212/36C08F2/18C08F4/34C08F8/32C08F8/24C08J9/28C08L25/08B01J20/26B01J20/30C02F1/28C02F1/62
Inventor 刘福强高洁徐超朱长青陈达陶学文李兰娟李爱民
Owner NANJING UNIV
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