Process for the production of bromine derivatives of aromatic compounds devoid of condensed benzene nuclet containing over 3 bromine atoms per molecule

Claim 1

A PROCESS FOR THE INTRODUCTION OF MORE THAN 3 BROMINE ATOMS INTO AN AROMATIC COMPOUND HAVING AT LEAST 4 REPLACEABLE HYDROGEN ATOMS AND BEING DEVOID OF CONDENSED BENZENE NUCLEI SELECTED FROM THE GROUP CONSISTING OF BENZENE, TOLUENE, PHENOL, ANILINE, DIPHENYL, DIPHENYL ETHER, DIPHENYL METHANE, TRIPHENYL METHANE, TETRAPHENYL METHANE AND THEIR HOMOLOGUES WHICH COMPRISES SUPPLYING THE AROMATIC COMPOUND TO BE BROMINATED, A BROMINATION CATALYST SELECTED FROM THE GROUP CONSISTING OF IODINE, IRON AND ALUMINUM AND 1 TO 1.5 G.-ATOMS OF BROMINE FOR EVERY G.-ATOM OF HYDROGEN TO BE SUBSTITUTED IN THE AROMATIC COMPOUND TO A REACTION MEDIUM OF CONCENTRATED SULFURIC ACID CONTAINING 20 TO 65% BY WEIGHT OF FREE SO3 DISSOLVED THEREIN, THE QUANTITY OF SO3 BEING SUFFICIENT TO REOXIDIZE THE HBR PRODUCED DURING THE BROMINATION TO BROMINE AND ALSO SUFFICIENT TO BIND THE WATER FORMED IN THE BROMINATION MIXTURE AND REACTING THE AROMATIC COMPOUND WITH THE BROMINE IN SUCH MEDIUM AT 20 TO 150*C. WHILE MIXING INTENSIVELY.