Patent ID: 7923595

Claim:
A process for the treatment of a product stream from an autothermal cracking process, said product stream comprising one or more olefins, hydrogen, carbon monoxide, carbon dioxide and one or more oxygenates, and wherein the oxygenates are present in the product stream prior to treatment at a total concentration in the range 100-5000 parts per million by weight, said process comprising (A) contacting the product stream with an aqueous stream comprising at least one compound selected from those represented by formulas: (1) H 2 N—OR 1 , and (2) H 2 N—NR 2 R 3 , where: R 1 is selected from H and carbon containing substituents, R 2 is H, and R 3 is a ketyl group of formula C(O)NR 4 R 5 where R 4 is H or an alkyl and R 5 is H, an alkyl or NH 2 , to provide a selective removal of oxygenates in the presence of carbon dioxide, and (B) subsequently passing the oxygenate treated stream from step (A) to an amine based carbon dioxide removal system to remove the carbon dioxide therein.