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Method for synthesizing polymer chelating agent with polyvinyl alcohol as base chain

A polymer chelating agent, polyvinyl alcohol technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as inconvenient application

Inactive Publication Date: 2008-05-07
广州市纳森水处理剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method synthesizes an insoluble solid product, which is not conveniently applied to the conventional continuous dosing treatment method

Method used

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  • Method for synthesizing polymer chelating agent with polyvinyl alcohol as base chain
  • Method for synthesizing polymer chelating agent with polyvinyl alcohol as base chain
  • Method for synthesizing polymer chelating agent with polyvinyl alcohol as base chain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Synthesize three parts of polymer chelating agent according to the three groups of different raw material ratios in "Table 1" as follows: add the prepared sulfuric acid solution into the reaction kettle, start the agitator, slowly add polyvinyl alcohol, and stir Until the polyvinyl alcohol is completely dissolved; slowly add the etherification agent (epichlorohydrin), control the reaction temperature at 30°C, and continue stirring for 2 hours after the addition; then slowly add diethylenetriamine to the reactor, and use cooling water to control the reaction The temperature does not exceed 80°C, and continue to stir for 1 hour after the addition; add the dissolved sodium hydroxide solution cooled to room temperature into the reaction kettle, and stir for 0.5 hours; then slowly add the chain extender (epichlorohydrin) dropwise, and control The reaction temperature does not exceed 80°C, continue to stir for 2 hours after the addition; then slowly add carbon disulfide dr...

Embodiment 2

[0031] Add 27g of 20% sulfuric acid solution into the reaction kettle, start the agitator, add 1.74g of polyvinyl alcohol (polymerization degree 1700), stir until the polyvinyl alcohol is completely dissolved; slowly add 5.85g of epichlorohydrin, and control the reaction temperature below 30°C , continue to stir for 1 hour after the addition; then slowly add 38.4g of diethylenetriamine to the reactor, use cooling water to control the reaction temperature not to exceed 80°C, continue to stir for 2 hours after the addition; dissolve 58g of sodium hydroxide in 82.3g In distilled water, add it into the reaction kettle after cooling, and stir for 0.5 hours; then slowly add 10 g of chain extender epichlorohydrin, and use cooling water to control the reaction temperature not to exceed 80°C, and continue stirring for 1 hour after adding; then slowly drop Add 76.8g of carbon disulfide, control the reaction temperature with cooling water to be 30° C., continue to stir and react for 4 hou...

Embodiment 3

[0034] Add 27g of 20% sulfuric acid solution into the reaction kettle, start the agitator, add 1.74g of polyvinyl alcohol (polymerization degree 500), stir until the polyvinyl alcohol is completely dissolved; slowly add 5.85g of epichlorohydrin, and control the reaction temperature below 30°C , continue to stir for 1 hour after the addition; then slowly add 38.4g of diethylenetriamine to the reactor, use cooling water to control the reaction temperature not to exceed 80°C, continue to stir for 2 hours after the addition; dissolve 58g of sodium hydroxide in 82.3g In distilled water, add it into the reaction kettle after cooling, and stir for 0.5 hours; then slowly add 20 g of chain extender epichlorohydrin, and use cooling water to control the reaction temperature not to exceed 80°C, and continue stirring for 1 hour after adding; then slowly drop Add 76.8g of carbon disulfide, control the reaction temperature with cooling water to be 30° C., continue to stir and react for 4 hour...

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Abstract

The invention relates to a synthetic method and the application of a macromolecule chelating agent with polyvinyl alcohol as a fundamental chain. The hydroxyl is used in a polyvinyl alcohol structure unit to react with halogenating alkylene oxide under the acid condition to produce etherified polyvinyl alcohol, and then is reacted with organic amine under the alkaline condition, and then the amido polyvinyl alcohol ramification is obtained through the crosslinking and of chain increasing halogenating alkylene oxide or dihaloalkane or epoxy resin. The amido polyvinyl alcohol ramification has reaction with carbon bisulfide under the alkaline condition to produce a macromolecule chelating agent having good absorption property to heavy-metal ion. The polyvinyl alcohol which is macromolecule is used, and the polyvinyl alcohol has a plurality of hydroxyl as the fundamental chain in order to increase the product molecular weight and the effective group content, thereby improving the collecting efficiency and the precipitation effect to the heavy-metal ion. The macromolecule chelating agent of the invention deals with the heavy-metal ion in various waste liquor, thereby having high collecting efficiency, complete eliminating, bulky and compact garrulous body, rapid sinking, etc.

Description

technical field [0001] The invention belongs to the technical field of synthesis of heavy metal ion chelating, trapping and precipitating agents. Background technique [0002] With the development of industry, the problem of environmental pollution has become increasingly prominent. Among them, non-ferrous metal smelting, electroplating, chemical industry, printing and dyeing and other industries discharge a large amount of waste water containing heavy metals, and heavy metal ions such as Hg are highly toxic to humans. 2+ 、As 3+ 、Cu 2+ 、Ni 2+ 、Cr 3+ , Pb 2+ 、Cd 2+ Even trace amounts can cause serious consequences, so the removal of heavy metal ions in water is particularly important. [0003] Traditional chemical precipitation methods such as pH control method and sulfide precipitation method have problems such as high operational requirements, sensitivity to pH value, incomplete removal of heavy metal ions, unstable sedimentation sludge and easy re-precipitation to c...

Claims

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Application Information

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IPC IPC(8): C08F116/06C08F8/06C08F8/32C08J3/24C02F1/62
Inventor 邓志之胡瑞
Owner 广州市纳森水处理剂有限公司
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