Precooling for ethylene recovery in dual demethanizer...

Details Precooling for ethylene recovery in dual demethanizer... Precooling for ethylene recovery in dual demethanizer...

F - Mech Eng,Light,Heat,Weapons

25

J

F25J 3/02 (2006.01) C10G 70/04 (2006.01)

Patent

CA 2141383

Ethylene-containing feed gas to a cryogenic ethylene recovery system is cooled and condensed, prior to fractionation, by an improved method which utilizes a combination of one or more partial condensers followed by one or more dephlegmators. The improved method simplifies heat exchange equipment and reduces capital cost, and is particularly suited for processing a pressurized precooled feed gas from ethane cracking which contains less than about 1 mole% of propane plus propylene.

Refroidissement et condensation d'une alimentation gazeuse renfermant de l'éthylène pour un système de récupération cryogénique d'éthylène, grâce à une méthode améliorée utilisant une combinaison d'un ou de plusieurs réfrigérants, suivis d'un ou de plusieurs déflegmateurs. La méthode améliorée simplifie le matériel d'échange thermique et réduit les coûts d'immobilisation; elle convient particulièrement bien pour le traitement d'une alimentation gazeuse prérefroidie et comprimée provenant du craquage de l'éthane et renfermant moins de 1 %, en pourcentage molaire, de propane et de propylène.

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