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

1982-05-25

1984-04-10

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 31, 62 34, 62 39, F25J 304

Patent

active

044419007

ABSTRACT:
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.

REFERENCES:
patent: 3130026 (1964-04-01), Becker
patent: 4252548 (1981-02-01), Markbreiter

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