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Linking dithizone resin and preparation method thereof

A technology of bonding dithizone and dithizone, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of unreported synthesis, achieve wide application prospects and improve stability

Inactive Publication Date: 2009-03-11
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Literature search shows that there is no report on the synthesis of dithizone-bonded chelating resin with white ball as the matrix

Method used

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  • Linking dithizone resin and preparation method thereof
  • Linking dithizone resin and preparation method thereof
  • Linking dithizone resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (a) Suspension polymerization.

[0026] 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.

[0027] In a 1000mL beaker, add 210g styrene, 26g divinylbenzene, and 140g liquid paraffin, stir well and set aside.

[0028] 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...

Embodiment 2

[0036] The synthetic steps of another embodiment of the present invention are as follows:

[0037] (a) Utilize styrene as a monomer, divinylbenzene as a crosslinking agent, utilize No. 200 solvent oil as a porogen, use gelatin (or polyvinyl alcohol, or several mixtures of magnesium carbonate, gelatin, and polyvinyl alcohol) ) as dispersant, using benzoyl peroxide as initiator, adopting suspension polymerization method to synthesize macroporous polystyrene-divinylbenzene copolymer with low crosslinking degree, select ethanol (or acetone, industrial alcohol, low boiling point solvent gasoline) ) for solvent extraction to remove the porogen remaining in the resin channels, and dry to obtain low-crosslinked macroporous polystyrene-divinylbenzene resin, that is, white balls.

[0038] Wherein the dosage of the crosslinking agent is 7% of the total amount of the monomer and the crosslinking agent, the dosage of the porogen is 100% of the weight of the monomer, and the crosslinking de...

Embodiment 3

[0046] The synthetic steps of another embodiment of the present invention are as follows:

[0047] (a) Using styrene as a monomer, divinylbenzene as a crosslinking agent, using liquid wax as a porogen, using magnesium carbonate and polyvinyl alcohol as a dispersant, using benzoyl peroxide as an initiator, and adopting suspension polymerization Synthesize macroporous polystyrene-divinylbenzene copolymer with low cross-linking degree, use steam distillation or ethanol as solvent extraction to remove the porogen remaining in the resin channels, and dry to obtain macroporous polystyrene with low cross-linking degree. Ethylene-divinylbenzene resin, that is, white balls.

[0048] Wherein the dosage of the crosslinking agent is 4% of the total amount of the monomer and the crosslinking agent, the dosage of the porogen is 80% of the weight of the monomer, and the crosslinking degree of the low crosslinking macroporous polystyrene is 8%.

[0049] (b) In a 1000ml three-neck flask, add ...

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Abstract

The invention discloses chelating resin bonded with dithizone and a method for preparing the same. A functional group of the resin is a dithizone group the construction unit of which is as shown in the graph. The preparation method comprises the following steps: styrene is taken as a monomer, diethylene is taken as a cross linking agent, fluid wax and other substances are taken as a pore-forming agent, magnesium carbonate and other substance are taken as a dispersing agent, and benzoperoxide is taken as an initiator, nitrating agents with different composition proportions are added for nitration and reduction so as to obtain macroporous amino resin, and stannous chloride dihydrate, hydrochloric acid and ethanol are added for diazotization, and acetone solution of the dithizone and glacial acetic acid are added to introduce the functional group so as to obtain the chelating resin bonded with the dithizone. Compared with the loaded resin, the stability of the functional group of the resin is obviously improved, so that the resin has wide application prospect in fields such as the metal separation and pre-enriching in the trace analysis, the heavy metal pollution treatment and recovery in the environment.

Description

technical field [0001] The invention relates to a chelating resin and a synthesis method thereof, in particular to a bonded dithizone chelating resin and a preparation method thereof. Background technique [0002] Dithizone (also known as diphenylthiocarbazone) contains multiple N and S atoms, belongs to S and N electron-donating ligands, can form stable complexes with many heavy metals, and is a widely used heavy metal chelating agent . Dithizone resin is widely used in the online enrichment of heavy metals in seawater, the separation and pre-enrichment of heavy metals in environmental analysis and other fields. However, the current dithizone resins are obtained by immersing anion exchange resins in dithizone solutions, and are mainly loaded on the resins by ion exchange and physical adsorption. The resulting resins must be converted to Zn type or stored in cold storage. It can be stored stably for one month, and part of the loading reagent of the loaded dithizone resin w...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F8/30C08F8/34C08F2/18C08J9/28B01J20/26
Inventor 刘福强荆晓生杨鑫李爱民凌盼盼李兰娟
Owner NANJING UNIV
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