Colored flame retardant tetra(bromophenoxy)p-benzoquinone compound and preparation method thereof
A technology of bromophenoxy and tetrachloro-p-benzoquinone, which is applied in the field of tetra-p-benzoquinone compounds and its preparation, to achieve the effects of cheap raw materials, good compatibility and high decomposition temperature
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[0029] Example 1 In a reactor equipped with a stirrer, a thermometer, and a high-efficiency reflux device, at 20°C, add 80ml of benzene, then 10.1g (0.04mol) of 2,4-dibromophenol sodium, and then add 2.46g (0.01mol) Tetrachloro-p-benzoquinone, keep the reaction temperature at 80℃ for 5h, change the reflux device to a vacuum distillation device, evaporate the benzene under reduced pressure (recycling), add 200ml methanol to dissolve the product, filter to remove the chlorine The filtrate was concentrated to 100ml, cooled and crystallized, filtered, and dried to obtain the brown solid product tetrakis(2,4-dibromophenoxy)p-benzoquinone with a yield of 80.0%.
Example Embodiment
[0030] Example 2 In a reactor equipped with a stirrer, a thermometer, and a high-efficiency reflux device, at 20°C, add 90ml of toluene, then 10.1g (0.04mol) of 2,4-dibromophenol sodium, and then add 2.46g (0.01mol) Tetrachloro-p-benzoquinone, heat preservation and reaction at 100℃ for 6h, change the reflux device to a vacuum distillation device, evaporate the toluene under reduced pressure (recycling), add 200ml methanol to dissolve the product, filter to remove chlorine The filtrate was concentrated to 100ml, cooled and crystallized, filtered, and dried to obtain the brown solid product tetrakis(2,4-dibromophenoxy)p-benzoquinone with a yield of 82.3%.
Example Embodiment
[0031] Example 3 In a reactor equipped with a stirrer, a thermometer, and a high-efficiency reflux device, at 20°C, 100ml of chlorobenzene was added first, followed by 11.3g (0.045mol) of 2,4-dibromophenol sodium, and then 2.46 g(0.01mol) tetrachloro-p-benzoquinone, heat preservation and reaction at 110℃ for 7h, change the reflux device to a vacuum distillation device, evaporate the chlorobenzene under reduced pressure (recycled), add 200ml methanol to dissolve the product, filter The sodium chloride and trace insolubles were removed, the filtrate was concentrated to 100ml, cooled and crystallized, filtered, and dried to obtain tetrakis(2,4-dibromophenoxy)p-benzoquinone as a brown solid product with a yield of 86.5%.
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