Heavy metal chelating agent and preparation method thereof

A heavy metal chelating agent and penetrating agent technology, which is applied in the direction of protection devices against harmful chemicals, etc., can solve the problems of ineffective removal of heavy metals in dust, high energy consumption, and increased landfill volume.

Inactive Publication Date: 2021-06-18
浙江沣蓝环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are three main treatment methods for heavy metal components in fly ash. One is to use soft cement solidification technology to solidify heavy metals. The soft hydrated silicate colloid C-H-S of soft cement forms relatively stable compounds such as hydroxides or complexes on the surface, but this method has the disadvantages of increasing the capacity of fly ash and increasing the volume of landfills; the second is melting and solidification This method is currently recognized as the safest and most stable incineration fly ash stabilization/solidification technology. This method is mainly to mix incineration fly ash and

Method used

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  • Heavy metal chelating agent and preparation method thereof
  • Heavy metal chelating agent and preparation method thereof

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Embodiment approach

[0020] As a preferred embodiment of the present invention, the dithiocarbamate compound is selected from one of sodium dimethyldithiocarbamate, sodium diethyldithiocarbamate, and sodium dibutyldithiocarbamate or several.

[0021] As a preferred embodiment of the present invention, the polyoxyethylene surfactant is selected from polyoxyethylene octylphenyl ether, polyoxyethylene derivatives, polyoxyethylene desoftened sorbitan monooleate, polyoxyethylene Oxyethylene oxypropylene block polymer, polyoxyethylene lauryl ether, polyoxyethylene monooleate, polyoxyethylene sorbitan monolaurate, polyoxyethylene distyrenated phenyl ether, polyoxyethylene Desoftened sorbitan monostearate, polyoxyethylene sorbitan monopalmitate, polyoxyethylene stearylamine, polyoxyethylene stearyl ether, polyoxyethylene nonylphenyl ether , polyoxyethylene oleyl ether, polyoxyethylene benzyl phenyl ether, polyoxyethylene tribenzyl phenyl ether and other polyoxyethylene type or several.

[0022] As a pre...

Embodiment 1

[0032]Add 28 parts of soft water into the reactor, add 3.5 parts of disodium edetate, 4.0 parts of trisodium citrate dihydrate, raise the reaction temperature to 40 degrees and stir until it is completely dissolved, add dimethyl disulfide 36 parts of sodium carbamate were stirred until completely dissolved and it was about to reach room temperature, 0.8 part of penetrant was added, and 1.0 part of polyoxyethylene octylphenyl ether was mixed uniformly to obtain a metal chelating agent.

Embodiment 2

[0034] Add 28 parts of soft water into the reactor, add 3.5 parts of disodium edetate, 4.0 parts of trisodium citrate dihydrate, raise the reaction temperature to 40 degrees and stir until it is completely dissolved, add dimethyl disulfide Stir 36 parts of sodium carbamate until it is completely dissolved and it will reach room temperature, add 0.8 part of penetrant, and 1.1 parts of polyoxyethylene octylphenyl ether and mix uniformly to obtain a metal chelating agent.

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Abstract

The invention discloses a heavy metal chelating agent and a preparation method thereof. The heavy metal chelating agent is prepared from the following components in parts by weight: 35 to 40 parts of a dithiocarbamic acid compound, 0.8 to 1.2 parts of a penetrant, 1.0 to 1.5 parts of a polyoxyethylene surfactant, 4.0 to 5.0 parts of trisodium citrate dihydrate, 3.5 to 4.5 parts of ethylene diamine tetraacetic acid and 25 to 35 parts of soft water. The heavy metal chelating agent can remove trace heavy metals in dust.

Description

technical field [0001] The invention relates to the field of metal chelating agents, in particular to a heavy metal chelating agent and a preparation method thereof. Background technique [0002] Heavy metal pollution refers to the environmental pollution caused by elements with significant biological toxicity such as Hg, Cd, Pb, Cr, and As, and general heavy metals with certain toxicity, such as Zn, Cu, Co, Ni, S, and their compounds. Heavy metals are difficult to degrade and can remain in the environment for a long time. They are easy to enrich and poison animals, plants and human body through the food chain system. A variety of heavy metals in dust such as: lead, chromium, copper, zinc, nickel, etc. mainly come from industrial pollution, traffic pollution and construction dust, etc., not only can enter animals and plants through soft water, atmosphere, soil and other media and affect the ecosystem and environment It is safe and can also enter the human body through inges...

Claims

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Application Information

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IPC IPC(8): A62D3/33A62D101/43A62D101/08
CPCA62D3/33A62D2101/08A62D2101/43
Inventor 董岩张洪雷王中
Owner 浙江沣蓝环保技术有限公司
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