High efficiency nitrogen generator

Details High efficiency nitrogen generator High efficiency nitrogen generator

1996-01-29

1998-01-27

Caposseln, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

F25J 300

Patent

active

057111677

ABSTRACT:
A process and apparatus is disclosed for highly efficient generation of nitrogen product in a single column arrangement. Oxygen-enriched liquid from a distillation column is partially vaporized to form a liquid and a vapor phase. The liquid is vaporized in a second reboiler/condenser and thereafter the vapor expanded to provide process refrigeration. The vapor portion having higher nitrogen content is compressed and returned to the distillation column for higher overall nitrogen recovery.

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patent: 4927441 (1990-05-01), Agrawal
patent: 4966002 (1990-10-01), Parker et al.
patent: 5170630 (1992-12-01), Stern

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