Process to separate nitrogen from natural gas

Details Process to separate nitrogen from natural gas Process to separate nitrogen from natural gas

1983-07-15

1985-02-26

Sever, Frank

Refrigeration

Processes

Circulating external gas

62 31, 62 33, 62 34, 62 40, F25J 302

Patent

active

045016003

ABSTRACT:
A cryogenic process to more efficiently separate nitrogen from a nitrogen-containing hydrocarbon stream wherein the separate recovery of natural gas liquids is increased and the final nitrogen removal from natural gas is accomplished at lower than conventional pressures. The nitrogen-methane separation column is driven by a closed loop heat pump circuit that utilizes a nitrogen-methane mixture.

REFERENCES:
patent: 3443388 (1969-05-01), Kramer et al.
patent: 3531943 (1970-10-01), Parnag et al.
patent: 3818714 (1974-06-01), Etzbach et al.
patent: 4352685 (1982-10-01), Swallow
patent: 4411677 (1983-10-01), Pervier et al.
patent: 4415345 (1983-11-01), Swallow
Crawford et al., Design and Operating Characteristics of the Sunflower Helium Plant, Journal Petroleum Technology, Sep. 1970, pp. 1098-1102.
Chiu, Exergy Analysis Aids Equipment Design for Cryogenic Process, Oil and Gas Journal, Jan. 18, 1982, pp. 88-91.

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