Process for the separation of a C.sub.2+ hydrocarbon fraction fr

Details Process for the separation of a C.sub.2+ hydrocarbon fraction fr Process for the separation of a C.sub.2+ hydrocarbon fraction fr

1985-11-12

1987-06-30

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 28, 62 38, F25J 302

Patent

active

046768122

ABSTRACT:
In a process for separating C.sub.2+ hydrocarbons from natural gas under elevated pressure, by rectification wherein the temperature and pressure required for rectification are attained by heat exchange and two-stage engine expansion, the rectification being conducted between the two expansion stages, the overhead methane fraction obtained during rectification is heated to ambient temperature, then engine expanded, and again heated to ambient temperature. The peak cold for rectification is essentially produced by engine expansion of the raw gas to be fractionated.

REFERENCES:
patent: 2557171 (1951-06-01), Bodle et al.
patent: 2823523 (1958-02-01), Eakin et al.
patent: 3375673 (1968-04-01), Cimler et al.
patent: 3416323 (1968-12-01), Heinik
patent: 3559417 (1971-02-01), Hoffman
patent: 4061481 (1977-12-01), Campbell et al.
patent: 4203741 (1980-05-01), Bellinger et al.
patent: 4274850 (1981-06-01), Becker

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