High purity nitrogen production and installation

Details High purity nitrogen production and installation High purity nitrogen production and installation

1994-09-12

1996-04-30

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62645, F25J 302

Patent

active

055113800

ABSTRACT:
Ultra-pure nitrogen is produced in a process comprising separating air in an integrated plurality of columns. A nitrogen-enriched stream is elevated in pressure and thereafter contaminants and impurities are removed in an auxiliary column system which allows for the main column to efficiently operate below the required nitrogen product pressure, while including an ability to optionally obtain a normal purity nitrogen and a liquid nitrogen product. The process and installation remains efficient and economical in a relatively small scale installation to produce extremely pure nitrogen product.

REFERENCES:
patent: 5255524 (1993-10-01), Agrawal et al.
patent: 5331818 (1994-07-01), Rathbone
patent: 5373699 (1994-12-01), Gastinne et al.

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