A kind of method adopting polyethylene glycol/alkali method to degrade brominated flame retardant

A brominated flame retardant and polyethylene glycol technology, which is applied in the field of degrading brominated flame retardants by polyethylene glycol/alkali method, and achieves the effects of mild reaction conditions, easy degradation treatment and high treatment concentration

Active Publication Date: 2016-12-28
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the polyethylene glycol / KOH method has been used for the degradation of persistent organic pollutants PCBs in the environment, there are no literatures and patents on the application of the polyethylene glycol / alkali dehalogenation method to brominated flame retardants. See the report

Method used

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  • A kind of method adopting polyethylene glycol/alkali method to degrade brominated flame retardant
  • A kind of method adopting polyethylene glycol/alkali method to degrade brominated flame retardant
  • A kind of method adopting polyethylene glycol/alkali method to degrade brominated flame retardant

Examples

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Effect test

Embodiment 1 10

[0019] Example 1 Degradation of decabromodiphenyl ether under the action of polyethylene glycol with different degrees of polymerization

[0020] Weigh 5.0g (5.2mmol) of decabromodiphenyl ether, add it to a 100ml three-neck flask, add polyethylene glycols with different degrees of polymerization (PEG-200, PEG-400, PEG-600, PEG-800 or PEG-1000 ) 50ml, and KOH3.5g (62.5mmol), the auxiliary agent is 5.0ml of ethylene glycol, the reaction temperature is controlled at 160°C under stirring at a speed of 300r / min, and the reaction pressure is normal pressure, according to the effect of polyethylene glycol The debromination rate of decabromodiphenyl ether is different, and the reaction time is also different (the reaction time starts from the reaction temperature rising to the set temperature). The specific debromination results are shown in Table 1 [debromination rate=n(Br) 溶液 / n(Br) 总 ].

[0021] Table 1. Degradation of decabromodiphenyl ether under the action of polyethylene glyc...

Embodiment 2

[0023] The influence of embodiment 2 additives on debrominated degradation of decabromodiphenyl ether in polyethylene glycol / KOH

[0024] Weigh 5.0g (5.2mmol) of decabromodiphenyl ether, add it to a 100ml three-necked flask, add 50ml of polyethylene glycol-600 (PEG-600), and KOH3.5g (62.5mmol), additives (ethylene glycol Alcohol, propylene glycol or glycerol) 5.0ml, the reaction temperature is controlled at 160°C under stirring at a speed of 300r / min, and the reaction pressure is normal pressure. According to the different debromination rates of decabromodiphenyl ether under the action of different additives, The reaction time is also different (the reaction time starts from the reaction temperature rising to the set temperature), and the specific debromination results are shown in Table 2 [debromination rate=n(Br) 溶液 / n(Br) 总 ].

[0025] Table 2. Effects of additives on the debromination degradation of decabromodiphenyl ether in polyethylene glycol / KOH

[0026] Au...

Embodiment 3

[0027] Embodiment 3 The influence of temperature on the debromination degradation of decabromodiphenyl ether in polyethylene glycol / KOH

[0028] Weigh 5.0g (5.2mmol) of decabromodiphenyl ether, add it to a 100ml three-necked flask, add 50ml of polyethylene glycol-600 (PEG-600), and KOH3.5g (62.5mmol), the auxiliary agent ethylene glycol 5.0ml, the reaction temperature is controlled under stirring at a rotating speed of 300r / min, and the reaction pressure is normal pressure. According to the different debromination rates of decabromodiphenyl ether at different temperatures, the reaction time is also different (reaction time increases from reaction temperature to start timing when the set temperature is reached), the specific debromination results are shown in Table 3 [debromination rate=n(Br) 溶液 / n(Br) 总 ].

[0029] Table 3. Effect of temperature on debromination degradation of decabromodiphenyl ether in polyethylene glycol / KOH

[0030] Auxiliary

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Abstract

The invention relates to a method for degrading a brominated flame retardant, in particular to a method for degrading a brominated flame retardant by adopting a polyethylene glycol / alkaline method. Under a mild condition and in the presence of an aid, polyethylene glycol / alkaline serving as a nucleophilic reagent is reacted with the brominated flame retardant to generate aryl ether polyethylene glycol and aryl ether alcohol, then aryl ether polyethylene glycol generates aryl ether alcohol by heating, and thus the purpose of degrading the brominated flame retardant is achieved, wherein the reaction is specifically shown as the formula in the specification. The method has the advantages that the efficiency is high, the reaction condition is mild, the reaction product is easy to treat, the operation is easy to control and the cost is low.

Description

technical field [0001] The invention relates to a method for degrading brominated flame retardants, in particular to a method for degrading brominated flame retardants by polyethylene glycol / alkali method. Background technique [0002] Brominated flame retardants, due to their good flame retardant properties, are widely used in materials and products such as plastics, electronics, construction, and textiles. Their production and use have a history of more than 30 years. In recent years, despite being troubled by the dioxin problem, the consumption of brominated flame retardants is still rising, the production of large-tonnage brominated flame retardants at home and abroad is still expanding, and new varieties of brominated flame retardants are also emerging. keep appearing. [0003] Brominated flame retardants themselves are generally less toxic (LD50>5000mg / kg), but they will produce toxic substances during processing and under high temperature and combustion conditions...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/34A62D101/28
CPCA62D3/34A62D2101/22A62D2101/28
Inventor 夏传海马宣宣刘苏静杨翠云王建华张志凯
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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