Distillation of methane from a methane-containing crude gas

Details Distillation of methane from a methane-containing crude gas Distillation of methane from a methane-containing crude gas

1978-06-21

1980-10-28

Yudkoff, Norman

Refrigeration

Processes

Circulating external gas

62 40, 62 31, F25J 302

Patent

active

042304695

ABSTRACT:
In the separation in a rectification column of methane and optionally lower-boiling components from a methane-containing crude gas, which gas contains additionally higher-boiling hydrocarbons, hydrogen sulfide, carbon dioxide, or mixtures thereof, wherein an auxiliary cycle containing a fluid medium is employed for the production of cooling to produce reflux liquid at the head of the rectifying column, an improvement is provided wherein liquid in the rectifying column positioned above the column sump and below the column head, is vaporized in indirect heat exchange with condensing cycle medium.

REFERENCES:
patent: 2713781 (1955-07-01), Williams
patent: 2823523 (1958-02-01), Eakin et al.
patent: 3509728 (1970-05-01), Mercer et al.

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