Preparation of novel acrylamide high-polymer chelating agent and application thereof to stabilization treatment of hazardous waste

A technology of polymer chelating agent and hazardous waste, applied in the field of new polymer chelating agent, to achieve the effect of low price and strong water solubility

Inactive Publication Date: 2011-02-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few related patents in China. Wang Wei, Jiang Jianguo, etc. have applied for a related patent (CN200410090662.9) on the metal chelating agent synthesized by polyamine or polyethyleneimine as the basic skeleton and reacting with carbon disulfide under alkaline conditions (CN200410090662.9). Electroplating wastewater treatment experiment and stabilization treatment of waste incineration fly ash, and chelating agent with similar amide structure as a skeleton for the stabilization treatment of hazardous waste has not yet seen relevant patents in China

Method used

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  • Preparation of novel acrylamide high-polymer chelating agent and application thereof to stabilization treatment of hazardous waste
  • Preparation of novel acrylamide high-polymer chelating agent and application thereof to stabilization treatment of hazardous waste
  • Preparation of novel acrylamide high-polymer chelating agent and application thereof to stabilization treatment of hazardous waste

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] (1) Preparation of polymer chelating agent:

[0011] Commercially available polyacrylamides can be anionic polyacrylamide (APAM), cationic polyacrylamide (CPAM), nonionic polyacrylamide (NPAM), zwitterionic polyacrylamide (ACPAM). The molecular weight is between 2 million and 10 million.

[0012] Add 70g of polyacrylamide, 40g of NaOH, and 500mL of water into the reactor. Stir to mix well and heat to 80°C for 1 hour. Cool to 40°C, add 70 g of carbon disulfide dropwise, and continue stirring for 10 hours after the dropwise addition to obtain a brown transparent solution. Cool to room temperature to obtain an aqueous solution of polymer chelating agent.

[0013] (2) Utilize above-mentioned chelating agent to the processing experiment of incineration fly ash:

[0014] Literature at home and abroad show that the leaching concentration of incineration fly ash exceeds the standard is mainly lead. In a certain city incineration fly ash solidification enterprise, the conten...

Embodiment 2

[0019] (1) Preparation of polymer chelating agent:

[0020] Commercially available polyacrylamides can be anionic polyacrylamide (APAM), cationic polyacrylamide (CPAM), nonionic polyacrylamide (NPAM), zwitterionic polyacrylamide (ACPAM). The molecular weight is between 2 million and 10 million.

[0021] Add 70g of polyacrylamide, 80g of NaOH, and 1L of water into the reactor. Stir to mix well and heat to 80°C for 1 hour. Cool to 40°C, add 140 g of carbon disulfide dropwise, and continue stirring for 10 hours after the dropwise addition to obtain a brown transparent solution. Cool to room temperature to obtain an aqueous solution of polymer chelating agent.

[0022] (2) Utilize above-mentioned chelating agent to the processing experiment of incineration fly ash:

[0023] Also adopt the incineration fly ash of a city incineration fly ash solidification enterprise in the implementation 1, use the above-mentioned chelating agent to carry out the incineration fly ash solidifica...

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Abstract

The invention relates to preparation and application of a novel high-polymer chelating agent which contains a heavy metal hazardous waste and is applied to stabilization treatment. The high-polymer chelating agent of the invention is an addition compound product of polyacrylamide and carbon disulfide, achieves good treatment effect on a solid or liquid waste and reaches the national waste landfill control standard. A synthesis process of the invention is simple, has low cost, can efficiently treat heavy metals in industrial or domestic garbage incineration wastes and is applied to a certain urban incineration fly ash curing enterprise.

Description

technical field [0001] The invention belongs to the preparation and application of a novel polymer chelating agent for stabilizing and treating hazardous waste containing heavy metals. Background technique [0002] With the rapid advancement of China's urbanization process, the rapid growth of urban population, and the continuous improvement of residents' consumption levels, the treatment of urban domestic waste has increasingly attracted people's attention. At present, with the continuous promotion of domestic waste incineration treatment methods, Beijing, Shanghai, Shenzhen, Chongqing and Changzhou have successively built large-scale waste incineration plants. The disposal of incineration fly ash has become a problem that must be solved. The incineration fly ash after pretreatment can enter the domestic waste landfill for landfill only after meeting the entry requirements in the "Pollution Control Standards for Domestic Waste Landfill Sites" (TB16889-2008). [0003] Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/34B09B3/00C08F20/56
Inventor 孙学芹
Owner EAST CHINA UNIV OF SCI & TECH
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