以正辛醇为溶剂合成四溴双酚A

以正辛醇为溶剂,以双酚A、溴素、双氧水为原料,采用原位溴化-氧化法合成了四溴双酚A。适宜的反应条件为:n(双酚A):n(溴素):n(双氧水)=1:2.05:2.1,反应温度为25℃,熟化温度为80℃,熟化时间为60 min,V(醇):V(水)=4:1,溶剂用量(以双酚A计)3.9 mL/g,在此条件下套用溶剂,以双酚A计的四溴双酚A的收率大于98.4%,熔点178.0～181.3℃。

SYNTHESIS OF TETRABROMOBISPHENOL-A IN 1-OCTANOL

Tetrabromobisphenol-A is a widely used flame retardant.It was synthesized with 1-octanol as organic solvent from bisphenol-A,bromine and hydrogen peroxide by in-situ bromination-oxida- tion.The optimal conditions for the reaction were found as follows:n(bisphenol-A):n(bromine):n (hydrogen peroxide)=1:2.05:2.1,reaction temperature 25℃,aging at 80℃for 60 min,V(1- octanol):V(water)=4:1,and the volume of solvent 3.9 mL/g bisphenol-A.The yield of tetra- bromobisphenol A based on bisphenol A was above 98.4% under the optimal conditions by using the recycled solvent and the melting point of the product was between 178.0℃to 181.3℃.