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Method for preparing heavy metal ion catching agent

A technology for heavy metal ions and scavengers, applied in chemical instruments and methods, water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of secondary pollution, high production cost, inconvenient use, etc. Fast, low cost and highly maneuverable effects

Active Publication Date: 2013-12-25
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new heavy metal ion capture agent, which is used for the treatment of sewage containing heavy metal ions, and overcomes the defects of high production cost, inconvenient use, and easy to cause secondary pollution of traditional capture agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Under normal pressure, in a 500ml three-necked round-bottomed flask equipped with electromagnetic stirring and reflux condenser, perform the following operations: at 25°C, add 36g of urea, 50ml of water, add 30g of sodium hydroxide, stir for 15min, and control the reaction temperature is 25°C. Then add 4g of diethylenetriamine and 1g of triethylenetetramine, and continue to stir and react for 30 minutes; then slowly add 58ml of carbon disulfide dropwise at 25°C, 1 drop per second, and keep the reaction temperature constant. To prevent volatilization of carbon disulfide, add During this time, an ice-water bath can be taken to continue the reaction for 90 minutes to obtain an orange-yellow mixed liquid. The mixed liquid was washed with water and suction filtered to remove impurities, then washed and dehydrated with absolute ethanol, and then vacuum-dried at 50°C for 5 hours to obtain a solid powder product.

Embodiment 2

[0025] Under normal pressure, in a 500ml three-necked round-bottomed flask equipped with electromagnetic stirring and reflux condenser, perform the following operations: at 25°C, add 12g of urea, 40ml of water, add 10g of potassium hydroxide, stir for 15min, and control the reaction temperature is 40°C. Then add 6.5ml of ethylenediamine, continue to stir and react for 45 minutes, then add 3g of carboxymethylcellulose at 40°C, mix and react for 30 minutes, then slowly add 46ml of carbon disulfide dropwise at 40°C, 1 drop per second, controlled The reaction temperature remains unchanged. In order to prevent the volatilization of carbon disulfide, an ice-water bath can be used when adding materials, and the reaction is continued for 180 minutes to obtain an orange-yellow mixed liquid. The mixed liquid was washed with water and suction filtered to remove impurities, then washed and dehydrated with absolute ethanol, and then vacuum-dried at 50° C. for 5 hours to obtain a solid powd...

Embodiment 3

[0027] Under normal pressure, in a 500ml three-necked round-bottomed flask equipped with electromagnetic stirring and reflux condenser, perform the following operations: at 50°C, add 59g of urea, 60ml of water, add 15g of sodium hydroxide, 10g of potassium hydroxide, and stir for 15min , and control the reaction temperature to 50°C; add 2.1g of triethylenetetramine, continue to stir and react for 60 minutes, then add 5g of starch and 3.5g of polyacrylamide at 50°C, mix and stir for 60 minutes, and then Slowly add 43.6ml of carbon disulfide dropwise, 1 drop per second, and keep the reaction temperature constant. To prevent volatilization of carbon disulfide, an ice-water bath can be used during feeding, and the reaction is continued for 280 minutes to obtain an orange-yellow mixed liquid. The mixed liquid was washed with water and suction filtered to remove impurities, then washed and dehydrated with absolute ethanol, and then vacuum-dried at 50°C for 5 hours to obtain a solid p...

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PUM

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Abstract

The invention discloses a method for preparing a heavy metal ion catching agent. The heavy metal ion catching agent is mainly formed by being prepared by urea, amine compounds, carbon disulfide, an additive, alkaline matter and distilled water. The heavy metal ion catching agent comprises, by weight, 9-30% of the urea, 1-6% of the amine compounds, 0-4.5% of the additive, 21-45% of the carbon disulfide, 8-17% of the alkaline matter and 20-35% of the distilled water. The method comprises the preparation steps of mixing the urea with the water, adding the alkaline matter to adjust the pH value, adjusting the reaction temperature, adding the micromolecular amine compounds, adding the additive, dropwise adding the carbon disulfide, controlling the temperature to conduct the reaction for a certain time, conducting suction filtration, using ethyl alcohol for conducting washing and drying, and obtaining the polyurea dithiocar-bamate heavy metal ion catching agent. According to the method for preparing the heavy metal ion catching agent, the production cost of the dithiocar-bamate heavy metal ion catching agent is remarkably reduced, and the actual treatment effect, on heavy metal ion waste water, of the heavy metal ion catching agent is good.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a preparation method of a heavy metal ion scavenger. technical background [0002] The demand for heavy metal resources in today's human society is rapidly increasing, and a large amount of waste containing heavy metals and their compounds is produced in the process of production, processing and use. If the content exceeds a certain limit, it will cause heavy metal pollution and seriously affect the structure of the ecosystem. , function and resource utilization. Especially industries such as smelting, chemical industry, electronics, automobile, mining, electroplating and light industry discharge a large amount of wastewater containing heavy metal ions due to the extensive use of various heavy metals and heavy metal compounds. These industrial wastewater containing heavy metals will cause serious pollution to surface water and groundwater, and are not biodegradable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56C02F1/62C02F1/64
Inventor 宋海农杨崎峰黄海师周永信李志礼王松锋韦艳玲杜镭
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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