Economic recovery of ethylene and/or propylene from low...

Details Economic recovery of ethylene and/or propylene from low... Economic recovery of ethylene and/or propylene from low...

C - Chemistry, Metallurgy

07

C

260/719

C07C 11/02 (2006.01) B01D 53/14 (2006.01) C07C 7/00 (2006.01) C07C 7/11 (2006.01)

Patent

CA 1150322

INVENTOR : WALTER SCHRAMM INVENTION: ECONOMIC RECOVERY OF ETHYLENE AND/OR PROPYLENE FROM LOW CONCENTRATION FEEDS ABSTRACT OF THE DISCLOSURE C2-C3 olefins are recovered from a low concentration gaseous feedstream, e.g. a Fischer-Tropsch waste gas. In a first process stage, the weight percent concentration of the olefins is enriched to at least about 25%. One specific enrichment technique includes scrubbing, preferably 2-stage scrubbing, with hydrocarbon scrubbing agents. Another technique comprises condensation of the olefin in regenerators and absorbing same in a purge phase. The resultant enriched stream,in any case, is then subjected to conventional low temperature separation to recover relatively pure individual streams of ethylene and propylene.

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