METHOD FOR ETHYLENE PRODUCTION BY STEAM THERMAL DECOMPOSITION OF NORMAL PARAFFIN Russian patent published in 2006 - IPC C10G55/04 

FIELD: organic chemistry, in particular method for adsorptive separation to produce raw materials for ethylene production.

SUBSTANCE: raw materials containing C₅-C₉-hydrocarbons including C₅-C₉-n-paraffin are fed in the first fractionation region to separate thereof into the first C₅-paraffin-enriched processing stream and the second processing stream containing C₆-C₉-hydrocarbons. The second stream is fed in adsorption section of adsorptive separation region, wherein n-paraffin are selectively retained on adsorbent to produce raffinate stream containing branched C₆-C₉-hydrocarbons and C₅-paraffin. The first stream as at least part of desorption agent is fed into desorption section of adsorptive separation region, wherein n-paraffin are eluated from adsorbent to produce extract stream containing C₆-C₉-n-paraffins. At least part of raffinate stream is separated in raffinate fractionation region into the first raffinate fraction containing C₅-paraffin and the second raffinate fraction containing branched C₆-C₉-hydrocarbons. At least part of extract stream is fed into thermal decomposition region for ethylene production.

EFFECT: method with increased yield of ethylene and raw materials for catalytic reforming.

1 dwg, 9 cl