Tetrabromobisphenol-A process

Details Tetrabromobisphenol-A process Tetrabromobisphenol-A process

1990-08-20

1991-05-21

Lone, Werren B.

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

Organic compounds

Oxygen containing

422224, 422225, 568723, 568724, 568776, 568779, C07C 3762, C07C 39367

Patent

active

050177281

ABSTRACT:
Tetrabromobisphenol-A is made in high purity and increased yield by adding a methanol-bromine solution to a methanol bisphenol-A solution with vigorous agitation. The amount of methanol in the reaction vessel is adjusted to yield a ratio of tetrabromobisphenol-A to methanol when the reaction is substantially complete that provides a lower amount of Hbr impurity in the tetrabromobisphenol-A product. An increased recovery of tetrabromobisphenol-A product is achieved by adjusting the water added to the reaction vessel when the bromination reaction is essentially complete.

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Chemical Abstract No. 174372c.
Chemical Abstract No. 173951d.
Chemical Abstract No. 110003e.
Chemical Abstract No. 186315h.

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