Tetrabromobisphenol-A process

Details Tetrabromobisphenol-A process Tetrabromobisphenol-A process

1988-06-13

1990-03-20

Richman, Barry S.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Including internal mixing or stirring means

422234, 366178, B01J 506

Patent

active

049099973

ABSTRACT:
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 reaction 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.

REFERENCES:
patent: 3182088 (1965-05-01), Hennis
patent: 3868423 (1975-02-01), Montanari et al.
patent: 4112242 (1978-09-01), Swietoslawski et al.
patent: 4451675 (1984-05-01), Bounds

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