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Laminated material for reclaiming bromine and bromine-containing water treatment method

A layered material, bromine technology

Inactive Publication Date: 2006-05-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic patent (CN 1648065A) published in 2005 has reported on the recovery of bromine from Grignard wastewater. The method is to concentrate the waste water to increase the concentration of bromide ions, and then react the bromide ions into ethyl bromide under concentrated sulfuric acid as a catalyst. A high-pressure reactor is required, and concentrated sulfuric acid is used as a catalyst, and there is a problem of serious equipment corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: in the aqueous solution that 1000mL bromide ion concentration is 2000mg / L, add a certain amount of LDHs (10.0g), water bath constant temperature (30 ℃), with 1% nitric acid solution or sodium hydroxide solution control pH value is one Constant value (such as 6.0), react for 6 hours, filter and recover LDHs, and the bromide ion concentration of the filtrate is 0.1mg / L.

Embodiment 2

[0019] Embodiment 2: In the aqueous solution that 1000mL bromide ion concentration is 100mg / L, add a certain amount of LDHs (1.0g), water bath constant temperature (30 DEG C), with 1% nitric acid solution or sodium hydroxide solution control pH value is one Constant value (such as 6.0), react for 1 hour, filter and recover LDHs, and the bromide ion concentration of the filtrate is 0.1mg / L.

Embodiment 3

[0020] Embodiment 3: In the aqueous solution that 2000mL bromide ion concentration is 100mg / L, add a certain amount of CLDH (2.0g), water bath constant temperature (30 ℃), react for 6 hours, filter and reclaim the processing material, the filtrate bromide ion concentration is 0.1mg / L.

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PUM

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Abstract

The invention provides a layered material for recycling the bromine and the method for treating water with bromine, belonging to the water treatment technique. The inventive layered material is the layered bi-hydroxy composite metallic oxide LDHs whose chemical formula is [M2+1-xM3+x (OH) 2] x+ (An-) x / 2*yH2O), and its sintered product CLDH. The invention has the advantages that the LDHs and its sintered product CLDH can be used in the treatment of industry acid waste water with bromine and the bromine recycle, while said material can treat the drinking water with bromine to avoid the hurt on the human body caused by the bromic acid ion produced in the water purification disinfection process. The bromine ion absorbed by said treatment agent exchanged by sodium carbonate or sodium-hydroxide solution in a certain concentration can be recycled via being prepared into bromine single element by a certain oxidant.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular provides a layered material for bromine recovery and a method for treating bromine-containing water. Background technique [0002] Bromide ions exist in natural groundwater, river water, seawater, and bittern. Bromide ions themselves are not harmful to the human body, but they are easily oxidized to bromate during oxidative sterilization in water plants, and bromate is a potential carcinogen. The maximum concentration of bromate in drinking water set by the European Community is 10 μg / L. The direct discharge of some bromine-containing industrial wastewater also increases the concentration of bromine in groundwater. [0003] In addition, as an industrial raw material, bromide produces a large amount of wastewater containing bromide ions in the process of production and use, for example, the wastewater generated by Grignard reaction produces wastewater containing bromide ...

Claims

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Application Information

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IPC IPC(8): B01J41/02C02F1/42
Inventor 段雪吕亮何静
Owner BEIJING UNIV OF CHEM TECH
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