Preparation of non-hazardous brominating reagents

Details Preparation of non-hazardous brominating reagents Preparation of non-hazardous brominating reagents

C - Chemistry, Metallurgy

07

C

C07C 37/62 (2006.01) C01B 7/09 (2006.01) C01B 9/04 (2006.01) C01B 11/20 (2006.01) C01D 3/10 (2006.01) C07B 39/00 (2006.01) C07C 17/08 (2006.01) C07C 231/12 (2006.01) C07C 233/15 (2006.01)

Patent

CA 2474338

The present invention relates to a non-hazardous brominating reagent from an aqueous alkaline bromine byproduct solution obtained from bromine recovery plant and containing 25 to 35 % bromine dissolved in aqueous lime or sodium hydroxide containing alkali bromide and alkali bromate mixture having bromide to bromate stoichiometric ratio in the range of 5:1 to 5.1:1 or 2:1 to 2.1:1 and a pH ranging between 8-12 and also relates to a method for borminating aromatic compounds by using the above brominating agent.

L'invention concerne un réactif de bromation non dangereux produit à partir d'une solution aqueuse alcaline de brome, qui est obtenue en tant que sous-produit provenant d'une unité de récupération de brome et qui contient 25 à 35 % de brome dissous dans de l'hydroxyde de calcium ou de l'hydroxyde de sodium aqueux sous la forme d'un mélange de bromure alcalin et de bromate alcalin, ledit mélange présentant un rapport stoechiométrique bromure/bromate situé dans une plage comprise entre 5:1 et 5,1:1 ou 2:1 et 2,1:1, et un pH compris entre 8 et 12. L'invention concerne également un procédé pour bromer des composés aromatiques au moyen dudit agent de bromation.

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