Method of treating carbon dioxide-containing natural gas

Details Method of treating carbon dioxide-containing natural gas Method of treating carbon dioxide-containing natural gas

F - Mech Eng,Light,Heat,Weapons

25

J

162/109

F25J 3/02 (2006.01) C07C 7/09 (2006.01) F25J 3/06 (2006.01)

Patent

CA 1190470

- 25 - METHOD OF TREATING CARBON-DIOXIDE-CONTAINING NATURAL GAS Abstract of the Disclosure A cryogenic separation process for rejecting carbon dioxide from a carbon-dioxide- containing natural gas mixture. The invention is specifically designed for treating a natural gas mixture recovered from a petroleum well employing the enhanced recovery technique of carbon dioxide flooding. The carbon-dioxide-containing natural gas mixture is treated using a particular arrangement of fractional condensation, partial vaporization and rectification unit operations to produce an enriched- methane gas stream and carbon dioxide product streams at various pressures. The invention is well suited for the bulk separation of large quantities of carbon dioxide from carbon-dioxide-containing natural gas mixtures, as a preparatory step for the subsequent purification of the enriched-methane product by conventional absorption techniques.

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