Process for the recovery of low molecular weight c...

Details Process for the recovery of low molecular weight c... Process for the recovery of low molecular weight c...

C - Chemistry, Metallurgy

07

C

C07C 11/02 (2006.01) C07C 7/11 (2006.01) C07C 9/02 (2006.01) C10G 70/04 (2006.01) C10G 70/06 (2006.01)

Patent

CA 2136629

ABSTRACT The invention relates to a process for the recovery of low molecular weight C2+ hydrocarbons, in particular ethylene and ethane from a cracking gas, in particular from a fluid catalytic cracking waste gas. In accordance with the invention the light C2+ hydrocarbons are scrubbed out of the cracking gas by absorption, using an organic, preferably paraffinic, physically acting scrubbing agent, the scrubbing agent having a molecular weight of between 50 and 75 g/mol, preferably between 60 and 75 g/mol. Particularly suitable as scrubbing agents are pentane, isopentane or mixtures thereof. Prior to the generation of the loaded scrubbing agent, co-extracted methane is advantageously stripped off.

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