Dephlegmator process for nitrogen rejection from natural gas

Details Dephlegmator process for nitrogen rejection from natural gas Dephlegmator process for nitrogen rejection from natural gas

1986-11-10

1988-03-22

Warner, Steven E.

Refrigeration

Processes

Circulating external gas

62 29, 62 39, 62 41, 62 44, F25J 304

Patent

active

047325984

ABSTRACT:
A process is disclosed for the rejection of nitrogen from natural gas with the optional recovery of natural gas liquids. The process of the present invention employs a dephlegmator which provides a high purity nitrogen reflux for a low pressure distillation column and provides subcooling of the feed and reflux to the low pressure column and reboiling of the low pressure column. The dephlegmator of the present invention combines the high pressure column and three heat exchangers of a conventional double column process into a single, compact unit, with corresponding reductions in interconnecting piping and capital investment.

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