Dephlegmator process for the recovery of helium

Details Dephlegmator process for the recovery of helium Dephlegmator process for the recovery of helium

1990-01-25

1991-05-21

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 24, 62 36, 62 42, F25J 300

Patent

active

050172042

ABSTRACT:
A crude helium product is produced from a natural gas stream containing helium by rectification of the feed gas in a dephlegmator heat exchanger. The process is fully auto-refrigerated, and is capable of achieving a helium recovery of 99% without the use of a recycle compressor or a heat pump compressor. A nitrogen product stream can be produced by addition of a second rectification circuit in the dephlegmator heat exchanger.

REFERENCES:
patent: 3260058 (1966-07-01), Ray et al.
patent: 4566886 (1986-01-01), Fabian et al.
patent: 4638638 (1987-01-01), Marshall et al.
patent: 4740223 (1988-04-01), Gates
patent: 4758253 (1988-07-01), Mitchell et al.
"A Step Ahead for Helium" Kellogram #3, 1963.

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