Preparation method of modified polyphenylene oxide film for water treatment
A polyphenylene ether and water treatment technology, applied in the direction of osmosis/dialysis water/sewage treatment, chemical instruments and methods, membrane technology, etc., can solve the problem of polar aprotic solvent dissolution, has not been widely used, and has low selectivity. and other problems, to achieve the effect of improving polarity, selectivity and transmittance, and saving bromine resources
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Embodiment 1
[0020] A preparation method of modified polyphenylene ether membrane for water treatment, including the following steps:
[0021] (1) Add 300Kg of organic solvent chloroform to the reaction kettle, add 50Kg of polyphenylene ether and 0.5Kg of catalyst tin tetrachloride under stirring, heat up to 60°C, and stir for 1 hour until all materials are dissolved;
[0022] (2) Add 0.28Kg of brominating agent N-bromosuccinimide, 0.05Kg of oxidant hydrogen peroxide and 0.16Kg of initiator benzoyl peroxide to the reaction kettle, add 300kg of water, and wash and remove after keeping it warm for 3h. Catalyst, static stratification, distillation and recovery of chloroform, to obtain brominated polyphenylene ether, the brominated polyphenylene ether has a methyl bromide degree of 25% and a benzene ring bromide degree of 16%;
[0023] (3) Using the gel phase inversion method, add 100L of carbon tetrachloride and 100L of isopropanol to another reactor, stir and mix, and add the brominated polyphenyle...
Embodiment 2
[0025] A preparation method of modified polyphenylene ether membrane for water treatment, including the following steps:
[0026] (1) Add 350Kg of organic solvent dichloropropane to the reaction kettle, add 50Kg of polyphenylene ether and 0.6Kg of catalyst titanium tetrachloride under stirring, heat up to 70°C, and stir for 1 hour until all materials are dissolved;
[0027] (2) Add 0.6Kg brominating agent tetraethylammonium bromide, 0.1Kg oxidant hydrogen peroxide and 0.21Kg initiator azobisisobutyronitrile to the reaction kettle. After the reaction is kept for 3 hours, 300kg of water is added, and the catalyst is washed with water. Static stratification, distillation and recovery of chloroform, to obtain brominated polyphenylene ether, the brominated polyphenylene ether has a methyl bromide degree of 28% and a benzene ring bromide degree of 17%;
[0028] (3) Using the gel phase inversion method, add 90L of carbon tetrachloride and 110L of isopropanol to another reactor, stir and mix...
Embodiment 3
[0030] A preparation method of modified polyphenylene ether membrane for water treatment, including the following steps:
[0031] (1) Add 400Kg of organic solvent chloroform to the reaction kettle, add 50Kg of polyphenylene ether and 0.5Kg of catalyst tin tetrachloride under stirring, heat up to 60°C, and stir for 1 hour until all materials are dissolved;
[0032] (2) Add 0.4Kg brominating agent N-bromosuccinimide, 0.06Kg oxidizing agent sodium peroxide and 0.2Kg initiator benzoyl peroxide to the reaction kettle. After the reaction is kept for 3h, 300kg water is added to proceed. The catalyst is removed by washing with water, the chloroform is recovered by distillation, and the brominated polyphenylene ether is obtained. The degree of bromination of methyl is 24% and the degree of bromination of benzene ring is 19%;
[0033] (3) Using the gel phase inversion method, add 90L of carbon tetrachloride and 120L of isopropanol to another reactor, stir and mix, and add the brominated polyph...
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