Efficient degradation method for polybrominated diphenyl ethers fire retardant

A polybrominated diphenyl ether and flame retardant technology, which is applied in the field of efficient degradation of polybrominated diphenyl ether flame retardants, can solve problems such as weakening thyroid function, and achieve the effects of improving reaction speed, efficient decomposition, good dispersibility and surface energy.

Active Publication Date: 2017-02-15
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The study of the impact on the human body found that the thyroid function

Method used

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Embodiment 1

[0016] A method for efficiently degrading polybrominated diphenyl ether flame retardants. The specific steps of the degradation method are: adding 0.1% surfactant relative to the flame retardant to the flame retardant, and then adding it to a microwave reactor In the non-pulse microwave heating at 250℃ for 1 hour to promote the activation and enrichment of polybrominated diphenyl ethers, the microwave reactor is placed in an ultrasonic environment and a sponge iron / Ag bimetallic catalyst 0.2 times the mass of the flame retardant is added. And press 0.05m 3 Hydrogen is introduced at a rate of 50,000 lux, and then the microwave reactor is irradiated with strong light with an intensity of 50,000 lux, and the polybrominated diphenyl ether flame retardant is decomposed and removed through the reduction reaction.

[0017] Wherein, the surfactant is a mixture of sodium lauryl sulfate and sodium lauryl sulfate; the mixing ratio is 1:1 by mass. The chemical reaction device in the microwav...

Embodiment 2

[0021] A method for efficiently degrading polybrominated diphenyl ether flame retardants. The specific steps of the degradation method are: adding 0.1% surfactant relative to the flame retardant to the flame retardant, and then adding it to a microwave reactor In the non-pulsed microwave heating at 275°C for 1.5 hours to promote the activation and enrichment of polybrominated diphenyl ethers, the microwave reactor was placed in an ultrasonic environment and a sponge iron / Ag bimetallic catalyst 0.2 times the mass of the flame retardant was added. , And press 0.065m 3 Hydrogen is introduced at a rate of 50,000 lux, and then the microwave reactor is irradiated with strong light with an intensity of 50,000 lux, and the polybrominated diphenyl ether flame retardant is decomposed and removed through the reduction reaction.

[0022] Wherein, the surfactant is a mixture of sodium glycocholate and polyethylene glycol p-isooctyl phenyl ether; the mixing ratio is 1:1 by mass. The chemical r...

Embodiment 3

[0026] A method for efficiently degrading polybrominated diphenyl ether flame retardants. The specific steps of the degradation method are: adding 0.1% surfactant relative to the flame retardant to the flame retardant, and then adding it to a microwave reactor In the non-pulsed microwave heating at 300°C for 2 hours to promote the activation and enrichment of polybrominated diphenyl ethers, the microwave reflector was placed in an ultrasonic environment and a sponge iron / Ag bimetallic catalyst 0.2 times the mass of the flame retardant was added. And press 0.08m 3 Hydrogen is introduced at a rate of 50,000 lux, and then the microwave reactor is irradiated with strong light with an intensity of 50,000 lux, and the polybrominated diphenyl ether flame retardant is decomposed and removed through the reduction reaction.

[0027] Wherein, the surfactant is a mixture of sodium lauryl sulfate and polyethylene glycol and isooctyl phenyl ether; the mixing ratio is 1:1 by mass. The chemical ...

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PUM

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Abstract

The invention discloses an efficient degradation method for a polybrominated diphenyl ethers fire retardant. The degradation method comprises the specific steps that a surfactant is added into the fire retardant, then the mixture is added into a microwave reactor, non-pulse microwave continuous heating is conducted at the temperature of 250-300 DEG C for 1-2 h, and ctivation and enrichment of polybrominated diphenyl ethers are facilitated; then the microwave reactor is put in an ultrasonic environment, and sponge iron/Ag bimetallic catalysts are added, hydrogen is led in; and then strong light with the intensity of 50000 lux irradiates the microwave reactor, and the polybrominated diphenyl ethers fire retardant is degraded through reduction reaction. According to the efficient degradation method, the sponge iron/Ag bimetallic catalysts are combined with the surfactant, the polybrominated diphenyl ethers can be degraded efficiently through reduction reaction, the efficient degradation method is simple, and the degradation efficiency is high.

Description

Technical field [0001] The invention relates to the technical field of environmental protection, in particular to a high-efficiency degradation method of polybrominated diphenyl ether flame retardants. Background technique [0002] Polybrominated diphenyl ethers (PBDEs for short) have 209 homologues such as tetrabromodiphenyl ether, pentabromo, hexabromo, octabromo, and decabrom. Polybrominated diphenyl ether is a brominated flame retardant with excellent performance, which is widely used in various industrial and consumer products. At the same time, polybrominated diphenyl ether is also a type of persistent organic pollutant. It is very stable in the environment, difficult to degrade, and has High lipophilicity, low water solubility, bioaccumulation and can be enriched along the food chain. At present, research on the degradation and elimination of polybrominated diphenyl ethers has received extensive attention. [0003] Polybrominated diphenyl ethers are our traditional flame r...

Claims

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Application Information

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IPC IPC(8): A62D3/02A62D3/178A62D101/22A62D101/28
CPCA62D3/02A62D3/178A62D2101/22A62D2101/28A62D2203/02
Inventor 魏东洋贺涛许振成孙云娜司圆圆李浩伍高燕洪伟蒋晓璐
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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