process for the production of kernbromierten einkernigen aromatic compounds with the highest possible bromierungsgrad

摘要

Mononuclear aromatic cpds., brominated in the nucleus and having max. degree of bromination, are prepd. by reacting a mononuclear aromatic cpd. (I), with Br2, by a process in which 2-20 wt. % of Br2 required, together with solvent and catalyst, is admixed with (I) together with the remaining 80-98 wt. % of Br2 to be charged, provided that the total Br2 quantity is 101-120 wt. % of the theoretically required Br2 quantity. The prods. are used as flame-retardants, esp. for polyester resins, lacquers, rubber and also as intermediates for other flame-proofing agents. The colourless bromination prod. is easily sepd. from reaction mixt. The mother liquor can be used for next charge, without purification. Side-reactions are prevented.