Elevated pressure air separation cycles with liquid production

Details Elevated pressure air separation cycles with liquid production Elevated pressure air separation cycles with liquid production

1991-05-14

1992-11-24

Bennet, Henry A.

Refrigeration

Processes

Circulating external gas

62 24, 62 31, 62 34, F25J 300, F25J 302

Patent

active

051652455

ABSTRACT:
The present invention relates to an improvement to a cryogenic process for the separation of air into its constituent components. In the process, a distillation column system having at least two distillation columns, a high pressure distillation column and a low pressure column is used; these two distillation columns are in thermal communication with each other. The low pressure column of the distillation column system operates at a pressure between 9 to 75 psig and a nitrogen product is produced from the top section thereof. At least 50% of the air to the distillation column system is removed as this nitrogen product, which has a nitrogen concentration of at least 95% and is at a pressure of at least 9 psig.
The improvement to the process is a series of steps which allows for the production of liquid products from the cryogenic process in an efficient manner. These steps are primarily the partial warming of the nitrogen product, its subsequent isentropic expansion and use of the inherent refrigeration of the expanded nitrogen. These steps can be carried out in three ways.

REFERENCES:
patent: 4433989 (1984-02-01), Erickson
patent: 4526595 (1985-07-01), McNeil
patent: 4543115 (1985-09-01), Agrawal et al.
patent: 4560397 (1985-12-01), Cheung
patent: 4604116 (1986-08-01), Erickson
patent: 4704147 (1987-11-01), Kleinberg
patent: 4732597 (1988-03-01), Jujasz et al.
patent: 4783210 (1988-11-01), Ayres et al.
patent: 4790866 (1988-12-01), Rathbone
patent: 4883516 (1989-11-01), Layland et al.
patent: 4883517 (1989-11-01), Rathbone
patent: 4895583 (1990-01-01), Flanagan et al.
patent: 4916908 (1990-04-01), Lavin et al.
patent: 4966002 (1990-10-01), Parker et al.

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