Tetrabromobisphenol-a process

Details Tetrabromobisphenol-a process Tetrabromobisphenol-a process

C - Chemistry, Metallurgy

07

C

23/390, 260/616.

C07C 37/62 (2006.01) B01J 10/00 (2006.01) C07C 39/367 (2006.01)

Patent

CA 1291167

ABSTRACT OF THE DISCLOSURE Tetrabromobisphenol-A is made in high purity by adding a methanol-bromine solution to a methanol- bisphenol-A solution with vigorous agitation. Use of the bromine-methanol solution reduces the amount of by- products compared to the use of liquid bromine feed to a methanol-bisphenol-A solution. The process is readily adapted to large scale equipment by circulating the reac- tion mixture from the reaction vessel through an external closed loop which includes an impingement mixer. The bromine-methanol feed is pumped at the proper rate and ratio into the impingement mixture whereby it impinges with the circulating reaction mixture. The resultant bromination mixture is then returned to the reaction vessel.

582545

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