Tetrabromobisphenol-A process

Details Tetrabromobisphenol-A process Tetrabromobisphenol-A process

1987-11-27

1988-11-08

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568723, 568776, 568779, C07C 3916, C07C 39367

Patent

active

047835567

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), Swietoxlawski et al.
patent: 4451675 (1984-05-01), Bounds
patent: 4628124 (1986-12-01), McKinnie

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