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Fly ash cured heavy metal chelating agent and preparation process thereof

A heavy metal chelating agent and fly ash solidification technology, which is applied in the direction of protection devices against harmful chemicals, can solve problems such as poor thermal stability, weak chelating ability, and complicated preparation methods, and achieve low preparation costs, simple preparation, and chelation. good effect

Inactive Publication Date: 2019-10-08
安徽安江环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heavy metal chelating agents mainly used in the market have the following disadvantages: weak chelating ability, poor thermal stability, and complicated preparation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A kind of preparation technology of fly ash solidified heavy metal chelating agent, comprises the steps:

[0021] Step 1, preparing each raw material according to the formula requirements;

[0022] Step 2, add polycarboxylate ammonium salt, dimercaptoethylamine hydrochloride, aminomethane acetate and thioacetate into reactor A in sequence, and stir fully at a temperature of 30-50°C to obtain a uniform Mixture A;

[0023] Step 3, adding the surfactant and water into the reactor B in sequence, fully stirring at room temperature to obtain a uniform mixed solution B;

[0024] Step 4: add the mixed solution A, mixed solution B and pH regulator into the reactor C in sequence, carry out ultrasonic oscillation under constant temperature conditions, and then stand still under vacuum conditions for 2 hours to obtain the finished product.

specific Embodiment 1

[0026] A fly ash solidified heavy metal chelating agent, comprising the following raw materials by weight:

[0027] 20 parts of polycarboxylate ammonium salt, 20 parts of dimercaptoethylamine hydrochloride, 15 parts of aminomethane acetate, 10 parts of thioacetate, 30 parts of water, 5 parts of surfactant; polycarboxylate ammonium salt is Sodium polycarboxylate; dimercaptoethylamine hydrochloride is sodium dimercaptoethylamine hydrochloride; aminomethane acetate is sodium aminomethane acetate; thioacetate is sodium thioacetate;

[0028] The surfactant is made of the following raw materials in parts by weight: 5 parts of isopropanolamide, 10 parts of citric acid, 2 parts of cosolvent, and 5 parts of dispersant; the cosolvent is acetamide; the dispersant is polyacrylic acid maleic acid copolymerized thing.

[0029] A kind of preparation technology of fly ash solidified heavy metal chelating agent, comprises the steps:

[0030] Step 1, preparing each raw material according to t...

specific Embodiment 2

[0035] A fly ash solidified heavy metal chelating agent, comprising the following raw materials by weight:

[0036] 20 parts of polycarboxylate ammonium salt, 20 parts of dimercaptoethylamine hydrochloride, 15 parts of aminomethane acetate, 10 parts of thioacetate, 30 parts of water, 5 parts of surfactant; polycarboxylate ammonium salt is Sodium polycarboxylate; dimercaptoethylamine hydrochloride is sodium dimercaptoethylamine hydrochloride; aminomethane acetate is sodium aminomethane acetate; thioacetate is sodium thioacetate;

[0037] The surfactant is made of the following raw materials in parts by weight: 5 parts of isopropanolamide, 10 parts of citric acid, 2 parts of cosolvent, and 5 parts of dispersant; the cosolvent is acetamide; the dispersant is polyacrylic acid maleic acid copolymerized things.

[0038] A kind of preparation technology of fly ash solidified heavy metal chelating agent, comprises the steps:

[0039] Step 1, preparing each raw material according to ...

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PUM

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Abstract

The invention discloses a fly ash cured heavy metal chelating agent and a preparation process thereof and belongs to the field of chemical preparations. The fly ash cured heavy metal chelating agent is prepared from the following raw materials in parts by weight: 20-40 parts of a polycarboxylic acid ammonium salt, 20-30 parts of dimercaptoethylamine hydrochloride, 15-25 parts of amino methane acetate, 10-20 parts of sulfo-acetate, 30-50 parts of water, 5-10 parts of a surfactant, wherein the surfactant is prepared from the following raw materials in parts by weight: 5-30 parts of isopropyl alcohol amine, 10-40 parts of citric acid, 2-6 parts of a cosolvent and 5-20 parts of a dispersant. The chelating agent disclosed by the invention is not only simple to prepare and low in preparation cost, but also high in chelating efficiency, rich in chelating type and high in market application value.

Description

technical field [0001] The invention belongs to the field of chemical preparations, in particular to a fly ash solidified heavy metal chelating agent and a preparation process thereof. Background technique [0002] Chelating agent, also known as complexing agent, is an organic or inorganic compound that can chelate with heavy metal ions to form a stable water-soluble complex, thereby deactivating heavy metal ions. Chelating agent molecules contain electron donors that can coordinate and combine with heavy metal ions, and have a series of special functions such as softening, descaling, rust prevention, stabilization, and synergism, so they are widely used in water treatment, textile printing and dyeing, papermaking, etc. technology field. The fly ash of domestic waste incineration has complex components, and the main pollutants are heavy metals with high leaching toxicity, which have serious harm to the environment. After testing, the fly ash of domestic waste incineration ...

Claims

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Application Information

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IPC IPC(8): A62D3/33A62D101/08
CPCA62D3/33A62D2101/08
Inventor 吴鑫刘波
Owner 安徽安江环保科技有限公司
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