Bromine reactive hydrocarbon contaminants are removed from aromatic streams
by first providing an aromatic feedstream having a negligible diene level.
The feedstream is contacted with an acid active catalyst composition under
conditions sufficient to remove mono-olefins. An aromatic stream may be
pretreated to remove dienes by contacting the stream with clay,
hydrogenation or hydrotreating catalyst under conditions sufficient to
substantially remove dienes but not mono-olefins.
