Song Nai-jia
2013
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Journal
Journal of Weinan Normal University
Abstract
The traditional synthesis process of 3,4,5-trifluorobromobenzene using 2,3,4-trifluoroaniline as the raw material was modified with the oxidization treatment of hydrogen bromide by hydrogen peroxide to regenerate bromine in brominating process because of the its low yield of main product,high yield of by-product and high cost,which made the bromine consumption reduce by half.The yield of 3,4,5-trifluorobromobenzene was more than 76%,while the yield of the by-product,1,2-dibromo-3,4,5-trifluorobenzene reduced to 3.0% under the optimal conditions analyzed by single factors,which have basically achieved the increase of the yield of the product and the decrease of the yield of the by-product.