Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1992-08-31
1993-08-17
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568722, 568723, 568728, C07C 39367
Patent
active
052371123
ABSTRACT:
This invention relates to a process for preparing tetrabromobisphenol-A in high yield and high purity comprising: (a) forming a reaction solvent from at least one non-polar solvent and an amount of aqueous hydrogen peroxide; (b) charging an amount of alkylidenediphenol to the reaction solvent to form a reaction mass; (c) feeding an amount of bromine to the reaction mass at a temperature and for a period of time sufficient to tetra-brominate substantially all of the alkylidenediphenol thus charged; (d) maintaining during step (c) the amount of hydrogen peroxide less than an amount required to convert substantially all of the HBr which forms to elemental bromine; and (e) heat treating the formed product whereby a product having less than about 20 ppm ionic impurities is produced.
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Chemical Abstracts 101 (26):231164p.
Chemical Abstracts 102 (8):62672d.
Chemical Abstracts 102 (10):79427a.
Chemical Abstracts 105 (18):155068p.
Chemical Abstracts 109 (13):110003e.
Chemical Abstracts 110 (20):173951d.
Ethyl Corporation
LaRose David E.
Lone Werren B.
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