Preparation and provision of high assay decabromodiphenylethane

C - Chemistry – Metallurgy – 07 – C

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C07C 17/12 (2006.01) C07C 25/18 (2006.01)

Patent

CA 2680010

High assay reaction-derived decabromodiphenylethane product is produced and provided. The process comprises feeding diphenylethane, a partially brominated diphenylethane, or both subsurface into the liquid phase of a reaction mixture formed from components comprising excess liquid bromine and aluminum-based Lewis acid bromination catalyst. The temperature of the reaction mixture, the catalyst concentration in the excess bromine in the reaction mixture, and the feed time are coordinated in the processes to produce high assay reaction-derived decabromodiphenylethane product. Ways of effecting such coordination are described.

L'invention consiste à produire et à fournir un produit de décabromodiphényléthane à titre élevé obtenu par réaction. Le procédé consiste à introduire un diphényléthane, un diphényléthane partiellement bromé, ou les deux sous-surfaces, dans la phase liquide d'un mélange réactionnel constitué de composants comprenant du brome liquide en excès et d'un catalyseur de bromation contenant un acide de Lewis à base d'aluminium. Dans les procédés, on coordonne la température du mélange réactionnel, la concentration du catalyseur dans le brome en excès dans le mélange réactionnel et le temps d'alimentation, afin de produire un produit de décabromodiphényléthane à titre élevé obtenu par réaction. L'invention décrit des façons d'effectuer une telle coordination.

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