Patent ID: 6506952
Filing Date: 2003-01-14
Classification: C07C

Abstract:
A process which comprises brominating cyclododecatriene in a liquid medium comprised of (1) at least 50 wt % of at least one liquid inert organic solvent other than 1,4-dioxane having a solubility in water of at least 1 wt % at 25Â° C., and (2) water in an amount of up to about 40 wt %, in the presence of (3) about 0.5 to about 30 wt % of bromide ion (Brâˆ’), whereby hexabromocyclododecane is produced, each wt % being based on the total weight of the liquid portion of the liquid medium, wherein said at least one liquid inert organic solvent consists essentially of (a) at least one halogen-free aprotic solvent containing at least two oxygen atoms or at least one nitrogen atomin the molecule other than 1,4-dioxane, or (b) at least one liquid polyalkylene glycol in which the alkylene groups each contain two or three carbon atoms and in which the average molecular weight of the polyalkylene glycol is at least about 150 and/or at least one liquid monoalkyl ether thereof, or (c) a combination of (a) and (b).