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Removing method for decabromodiphenyl ether causing environmental pollution

A technology for decabromodiphenyl ether and environmental pollutants, which is applied in the field of environmental remediation, can solve the problems such as failure to achieve debromination and removal, production of highly toxic dioxin-like compounds, and inability to completely debrominate, and achieves a simple and easy process. Forming the effect of large-scale production and wide application prospects

Inactive Publication Date: 2007-03-07
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Due to the very stable chemical properties of decabromodiphenyl ether, when incinerated at high temperature, not only cannot be burned and decomposed, but will produce highly toxic dioxin-like compounds. In addition, Ahn et al. reported that the method of decomposing decabromodiphenyl ether by light also has a fatal weakness That is, the debromination efficiency is low, the cost is high, and it cannot be completely debrominated, and the purpose of complete debromination and removal cannot be achieved, and has no use value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: In the three-necked bottle of 100 milliliters, install thermometer, stirrer, add decabromodiphenyl ether (1.0 mmol, 0.959g), metal zinc powder (5mmol, 0.33g), ammonium chloride (10 mmol , 0.53g), methanol (50ml), and then heated to 65°C with stirring. Stirring was continued at this temperature for a further 8 hours. Then cooled to room temperature, methanol was distilled off, soluble matter was extracted with ethyl acetate, and concentrated under reduced pressure. The concentrated product was then analyzed by GC / MS, and the conversion of decabromodiphenyl ether was 100%. The composition of the product was monobromodiphenyl ether (0.3%), dibromodiphenyl ether (16.1%), tribromodiphenyl ether (41.4%), and tetrabromodiphenyl ether (42.2%).

Embodiment 2

[0013] Embodiment 2: In the three-necked bottle of 100 milliliters, install thermometer, stirrer, add decabromodiphenyl ether (10 mmol, 0.959g), metal zinc powder (10 mmol, 0.65g), ammonium chloride (20 mmol , 1.06g), methanol (100ml), and then heated to 60°C with stirring. Stirring was continued at this temperature for a further 10 hours. Then cooled to room temperature, methanol was distilled off, soluble matter was extracted with ethyl acetate, and concentrated under reduced pressure. The concentrated product was then analyzed by GC / MS, and the conversion of decabromodiphenyl ether was 100%. The composition of the product was monobromodiphenyl ether (1.3%), dibromodiphenyl ether (46.1%), tribromodiphenyl ether (31.4%), and tetrabromodiphenyl ether (21.2%).

Embodiment 3

[0014] Embodiment 3: in the three-necked flask of 100 milliliters, install thermometer, stirrer, add decabromodiphenyl ether (10 mmol, 0.959 gram), metallic zinc powder (300 mmol, 16.5 g), ammonium chloride (400 mmol , 21.2g), ethanol (600ml), and then heated to 65°C with stirring. Stirring was continued at this temperature for a further 14 hours. Then it was cooled to room temperature, the ethanol was distilled off, the soluble matter was extracted with ethyl acetate, and concentrated under reduced pressure. The concentrated product was then analyzed by GC / MS, and the conversion of decabromodiphenyl ether was 100%. The composition of the product was monobromodiphenyl ether (18.3%), dibromodiphenyl ether (55.9%), tribromodiphenyl ether (22.4%), and tetrabromodiphenyl ether (3.5%).

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PUM

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Abstract

The invention relates to a method for removing toxic pollution as decabrans diphenyl oxide. Wherein, it mixes the decabrans diphenyl oxide, metal zinc powder, ammonium salt, and mellow solvent, and heats them into 65Deg. C to flux; the metal zinc powder reacts with ammonium salt to generate hydrogen gas; the decabrans diphenyl oxide is reduced by said hydrogen gas, to generate debrominate compound, as iodine diphenyl ether, etc, which are important chemical materials. The invention has simple process and easy operation.

Description

technical field [0001] The invention belongs to the technical field of environmental restoration, and in particular relates to a method for removing decabromodiphenyl ether, a toxic and harmful environmental pollutant. Background of the invention [0002] The environmental pollution of persistent toxic chemicals is the same as the destruction of the ozone layer and the greenhouse effect and is called the three major environmental problems affecting human survival and health in the 21st century. After the toxic and harmful environmental pollutant decabromodiphenyl ether is absorbed by the human body, it will lead to the decline of male sperm motility and female egg mutation. The result is the decline of human reproductive ability, which directly affects human reproduction and future survival. As a result, developed countries have phased out this product and developed alternatives. As a flame retardant, decabromodiphenyl ether is mainly used in plastics, rubber, phenolic resi...

Claims

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Application Information

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IPC IPC(8): A62D3/00
Inventor 刘国斌杨彬李妙葵高翔
Owner FUDAN UNIV
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