A temperature-sensitive chelating adsorption resin, its preparation method, and its method for treating waste water

A temperature-sensitive, chelating adsorption technology, used in adsorption water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc. The effect of improving adsorption capacity

Active Publication Date: 2022-04-22
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above problems have restricted the application of the adsorption resin method in the treatment of printing and dyeing wastewater containing heavy metal ions and highly toxic and refractory naphthalene substances.

Method used

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  • A temperature-sensitive chelating adsorption resin, its preparation method, and its method for treating waste water
  • A temperature-sensitive chelating adsorption resin, its preparation method, and its method for treating waste water
  • A temperature-sensitive chelating adsorption resin, its preparation method, and its method for treating waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] At room temperature, a premixed water phase was added, and the composition was 292.3 g of deionized water, 9.0 g of sodium chloride, 0.2 g of polyvinyl alcohol, and 0.3 mg of methylene blue. Add the premixed oil phase, and the composition is 40g of divinylbenzene, 10g of ethylstyrene, 25.0g of toluene, 25.0g of 3# white oil, and 0.5g of benzoyl peroxide. Start stirring, raise the temperature to 85°C, keep the temperature constant for 6 hours, wash with water, extract the porogen, and dry to obtain porous white balls containing suspended double bonds, with a particle size distribution of 400-1200μm and a specific surface area of ​​750m 2 / g, the average pore diameter is 7.0nm, and the pore volume is 1.3mL / g.

[0059]Take the above 50.0 g of porous white balls containing pendant double bonds and place them in 150 mL of tetrahydrofuran, add 15.0 g of N-isopropylacrylamide, 15.0 g of 3-ethylene-dopamine, and 0.8 g of azobisisobutyronitrile, and replace by bubbling with nitr...

Embodiment 2

[0073] At room temperature, the premixed water phase was added, and the composition was 654.3 g of deionized water, 73.1 g of sodium chloride, 3.6 g of gelatin, and 7.3 mg of methylene blue. Add the premixed oil phase, and the composition is 50.0 g of trivinylbenzene, 40.9 g of styrene, 136.4 g of xylene, 136.4 g of 200# solvent naphtha, and 1.8 g of azobisisobutyronitrile. Start stirring, raise the temperature to 65°C, keep the temperature for 12 hours, wash with water, extract the porogen, and dry to obtain porous white balls containing suspended double bonds, with a particle size distribution of 200-800 μm and a specific surface area of ​​800 m 2 / g, the average pore diameter is 4.0nm, and the pore volume is 2mL / g.

[0074] Take the above 50.0 g of porous white balls containing dangling double bonds and place them in 500 mL of N,N-dimethylformamide, add 40.0 g of N-n-propyl acrylamide, 5.0 g of 3,5-divinyl-dopamine, peroxide Dibenzoyl 4.8g, argon gas bubbling for 20min to ...

Embodiment 3

[0077] At room temperature, the premixed water phase was added, and the composition was 473.0 g of deionized water, 4.8 g of sodium chloride, 47.8 mg of hydroxypropyl methylcellulose, and 0.05 mg of methylene blue. Add the premixed oil phase, and the composition is 50.0 g of divinyltoluene, 21.4 g of chlorinated styrene, 11.9 g of ethylbenzene, 11.9 g of C20 alkanes, and 0.36 g of dibenzoyl peroxide. Start stirring, raise the temperature to 95°C, keep the temperature constant for 4 hours, wash with water, extract the porogen, and dry to obtain porous white balls containing suspended double bonds, with a particle size distribution of 600-2000 μm and a specific surface area of ​​200m 2 / g, the average pore diameter is 40.0nm, and the pore volume is 0.3mL / g.

[0078] Take the above 50.0g porous white balls containing pendant double bonds and place them in 50mL of nitrobenzene, add 5.0g of N,N-diethylacrylamide, 40.0g of 5-ethylene-dopamine, and 0.1g of tert-butyl peroxypivalate ...

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Abstract

The invention discloses a temperature-sensitive chelating adsorption resin, a preparation method thereof and a method for treating waste water by using the resin. The method comprises the following steps: 1) mixing and swelling the porous white ball containing the suspended double bond with a swelling agent, a temperature-sensitive monomer, a dopamine-like monomer, and an initiator; 2) heating the mixed system described in step 1) in an inert gas environment , triggering the polymerization of temperature-sensitive monomers, dopamine-like monomers and the double bonds in the porous white balls containing suspended double bonds, and at the same time, the dopamine-like monomers are self-crosslinked under the action of the initiator to form polydopamine, and the temperature-sensitive chelated adsorption resin. The resin of the invention is particularly suitable for treating printing and dyeing wastewater containing heavy metal ions and highly toxic and difficult-to-biodegrade naphthalene substances. The adsorption and recovery of heavy metal ions and naphthalene substances in wastewater, and the discharge of treated wastewater up to standard provide a feasible solution for zero discharge of industrial wastewater containing heavy metal ions and naphthalene substances.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, specifically relates to a temperature-sensitive chelating adsorption resin and a preparation method thereof, and also relates to using the resin to treat waste water, especially one containing heavy metal ions and highly toxic and refractory naphthalene substances at the same time The method of printing and dyeing wastewater. Background technique [0002] With the increasingly stringent national environmental protection policies and regulations and the continuous enhancement of social environmental protection awareness, industrial wastewater treatment and recycling processes have received widespread attention. Among them, printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, and complex components. Among them, naphthalene substances and heavy metal ions are more difficult to treat. Naphthalene substances in printing and dyeing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/261B01J20/30C02F1/285C02F2101/20C02F2101/30
Inventor 欧洋赵伟国孙家宽华卫琦
Owner WANHUA CHEM GRP CO LTD
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