Effluent gas treatment

A process for the treatment of a high pressure effluent gas stream which contains methyl bromide from a bromine-assisted air oxidation process to remove organic constituents and recover energy, comprising

• (a) preheating the effluent gas stream while still at high pressure to a temperature of from 250.degree. C. to 400.degree. C.;
• (b) catalytically oxidizing the effluent gas stream, in the optional presence of an amount of a combustion assistant selected from the group consisting of methanol, methyl acetate, hydrogen, natural gas, methane, propane, butane and mixtures thereof, to thereby raise the temperature of the oxidized gas to a value in the range of from 400.degree. C. to 700.degree. C. and convert methyl bromide to bromine, HBr or mixture thereof;
• (c) passing the catalytically oxidized gas to an energy recovery system;
• and
• (d) thereafter recovering bromine, HBr or mixture thereof from the gas stream.