Process for H2S and HC removal from natural gas

Details Process for H2S and HC removal from natural gas Process for H2S and HC removal from natural gas

1989-09-01

1990-06-19

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

55 68, 62 20, F25J 300

Patent

active

049341464

ABSTRACT:
A natural gas, which in addition to methane contains 2 to 4 carbon atoms per molecule and H.sub.2 S, is treated to remove the H.sub.2 S and the hydrocarbons in part. The natural gas under a pressure of at least 5 bars is indirectly cooled in a heat exchange zone to temperatures from -30.degree. to 100.degree. C. The condensate is removed from the cooled natural gas and is pressure-relieved and is then passed as a coolant through the heat exchange zone. Scrubbing liquor is cooled in the heat exchange zone to temperatures from -30.degree. to -80.degree. C. and is contacted in a scrubbing zone with the natural gas from which the condensate has been removed. The laden scrubbing liquor which has been withdrawn from the scrubbing zone is passed through the heat exchange zone. The natural gas which has been purified in the scrubbing zone is pressure-relieved and is also passed through the heat exchange zone.

REFERENCES:
patent: 3373574 (1968-03-01), Fisher
patent: 3654769 (1972-04-01), Linde
patent: 4038332 (1977-07-01), Carter
patent: 4336045 (1982-06-01), Fisher et al.
patent: 4488890 (1984-12-01), Foerg et al.
patent: 4654062 (1987-03-01), Gottier et al.
patent: 4710210 (1987-12-01), Gazzi et al.
patent: 4711211 (1987-12-01), Gazzi et al.

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