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process for the production of tetrabrombisphenol with reduced formation of alkylbromiden as byproducts.
process for the production of tetrabrombisphenol with reduced formation of alkylbromiden as byproducts.
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机译:降低四溴联苯酚副产物生成量的四溴联苯酚的制备方法。
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摘要
A process for the preparation of 4,4'-isopropylidene bis(2,6-dibromophenol), also known as tetrabrombisphenol A, that dramatically reduces the formation of alkyl bromide by-products. Bisphenol A is brominated with a C3 to C5 n-alcohol in a water mixture to suppress the formation of alkyl bromides. The bisphenol A is brominated between 15 DEG C. and 25 DEG C. and then heated at a 55 DEG C. to 70 DEG C. to insure bromination is complete. The tetrabrombisphenol A is then filtered from the reaction mixture and dried. Tetrabromobisphenol A produced from this process typically has a melting point of 180 DEG C. or higher, and is typically greater than 98% pure. Hydrogen peroxide is optionally combined with the reactants to reduce the amount of added bromine necessary for the bromination of the tetrabromobisphenol A.
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