Novel chelating heavy metal capturing agent, and synthesis method and application thereof

A technology of heavy metal scavenger and synthesis method, which is applied in chemical instruments and methods, metallurgical wastewater treatment, water pollutants, etc., can solve the problems of anti-dissolution, general chelation ability and difficult control of heavy metal scavenger, and achieve high-efficiency capture and Sedimentation performance, solution to poor capture performance, effects of solution to handling problems

Active Publication Date: 2018-04-06
东营睿港投资服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent discloses the invention patent application of "a polymer of polyethylene diamine tetraacetic acid unit". ; but there are some technical defects: (1) Most complex electroplating wastewater is acidic wastewater, which cannot be added directly, and the pH value needs to be adjusted to neutral to alkaline to effectively settle; (2) Under alkaline conditions , the feeding ratio of the new heavy metal scavenger is difficult to control, and excessive feeding will easily lead to slow precipitation or no precipitation and anti-dissolution; (3) The chelating ability of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] It is a new type of chelating heavy metal scavenger, which is prepared by the following steps:

[0022] Step 1 Synthesis of PHEMAA polymer backbone

[0023] Take 1 part of azobisisobutyronitrile initiator, 200 parts of hydroxyethyl acrylamide (HEMAA) and 100 parts of methanol, carry out polymerization reaction at 80°C for 4 hours under nitrogen protection, and obtain a degree of polymerization (DP) of 230 Polyhydroxyethyl acrylamide (PHEMAA);

[0024] Step 2 Functional polymer side chain precursor polymer PNVF-COOH

[0025] Take 1 part of azodicyanovaleric acid initiator, 300 parts of N-vinylformamide (NVF) and 300 parts of water, carry out radical polymerization at 50 °C for 4 hours under nitrogen protection, and obtain the degree of polymerization ( DP) is 50 functional polymer side chain precursor polymer PNVF-COOH;

[0026] Step 3 Synthesis of ethylene glycol diethyl ether diamine tetraacetic dianhydride (EGTAD)

[0027] 20 parts of ethylene glycol diethyl ether...

Embodiment 2

[0034] It is a new type of chelating heavy metal scavenger, which is prepared by the following steps:

[0035] Step 1 Synthesis of PHEMAA polymer backbone

[0036] Take 1 part of azobisisobutyronitrile initiator, 400 parts of hydroxyethyl acrylamide (HEMAA), 50 parts of methanol, carry out polymerization reaction at 70 ° C under nitrogen protection for 9 hours, and obtain a degree of polymerization (DP) of 570 Polyhydroxyethyl acrylamide (PHEMAA);

[0037] Step 2 Functional polymer side chain precursor polymer PNVF-COOH

[0038] Take 1 part of azodicyanovaleric acid initiator, 300 parts of N-vinylformamide (NVF) and 100 parts of water, carry out radical polymerization at 60 °C for 5 hours under nitrogen protection, and obtain the degree of polymerization ( DP) is 120 PNVF-COOH;

[0039] Step 3 Synthesis of ethylene glycol diethyl ether diamine tetraacetic dianhydride (EGTAD)

[0040] 60 parts of ethylene glycol diethyl ether diamine tetraacetic acid and 60 parts of acetic ...

Embodiment 3

[0047] It is a new type of chelating heavy metal scavenger, which is prepared by the following steps:

[0048] Step 1 Synthesis of PHEMAA polymer backbone

[0049] Take 1 part of azobisisobutyronitrile initiator, 500 parts of hydroxyethyl acrylamide (HEMAA) and 20 parts of methanol, carry out polymerization reaction at 60°C for 10 hours under nitrogen protection, and obtain a degree of polymerization (DP) of 850 Polyhydroxyethyl acrylamide (PHEMAA);

[0050] Step 2 Functional polymer side chain precursor polymer PNVF-COOH

[0051] Take 1 part of azodicyanovaleric acid initiator, 300 parts of N-vinylformamide (NVF) and 50 parts of water, carry out radical polymerization at 70 °C for 6 hours under nitrogen protection, and obtain the degree of polymerization ( DP) is 180 PNVF-COOH;

[0052] Step 3 Synthesis of ethylene glycol diethyl ether diamine tetraacetic dianhydride (EGTAD)

[0053] Dissolve 80 parts of ethylene glycol diethyl ether diamine tetraacetic acid and 80 parts ...

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PUM

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Abstract

The invention relates to a novel chelating heavy metal capturing agent, and a synthesis method and application thereof. The technical scheme is characterized in that a polymer main chain polyhydroxyethyl acrylamide, a functional polymer side chain precursor polymer carboxyl-terminated poly(N-vinylformamide), water, a catalyst N-hydroxysuccinimide, 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide methiodide, potassium hydroxide, ethylene glycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid dianhydride and carbon disulfide are employed for prepare the novel chelating heavy metal capturing agent, and the novel chelating heavy metal capturing agent is used to treat heavy metal wastewater discharged from electroplating, smelting, mining, beneficiation, chemical engineering and machinery. The functional group of the capturing agent can adsorb complexed heavy metal ions, and each basic unit can provide six coordination atoms for strong chelation and adsorption. Further, a chemical precipitation reaction between sodium dithiocarbamate at the side chain and a sedimentation aid is facilitated through a polymer brush, and a large aggregate is generated in seconds, so that rapid settling is realized and the operation is simple.

Description

technical field [0001] The invention belongs to the field of water treatment technology and polymer functional materials, and in particular relates to a novel chelated heavy metal scavenger and a synthesis method and application thereof; the invention mainly discharges heavy metals in electroplating, smelting, mining, mineral processing, chemical industry and machinery, etc. Wastewater industry applications. Background technique [0002] Heavy metal wastewater mainly comes from electroplating, smelting, mining, mineral processing, chemical and machinery industries. After the wastewater containing heavy metals produced by these industries is discharged into natural water bodies, it not only poses a threat to aquatic organisms, but also may be continuously enriched in organisms through the food chain, and ultimately endanger human health. The traditional methods of heavy metal wastewater treatment mainly include chemical precipitation method, heavy metal scavenger precipitati...

Claims

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Application Information

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IPC IPC(8): C02F1/56C02F1/52C02F101/20C02F103/16
CPCC02F1/5236C02F1/56C02F2101/20C02F2103/16
Inventor 刘锋唐秋实陈燕舞彭琦洪丹张浥琨郭志杰霍应鹏
Owner 东营睿港投资服务有限责任公司
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