Process for air fractionation by low-temperature rectification

Details Process for air fractionation by low-temperature rectification Process for air fractionation by low-temperature rectification

1988-11-14

1989-11-28

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 43, F25J 300

Patent

active

048835188

ABSTRACT:
In a system for air fractionation by low-temperature rectification, refrigeration is produced in a cooling stage by compression and expansion of the feed air or of nitrogen from rectification. By using the work gained during expansion for compressing only a partial stream of the gas passed through the cooling stage, the system according to this invention operates with increased efficiency and lower operating costs.

REFERENCES:
patent: 4152130 (1979-05-01), Theobald
patent: 4555256 (1985-11-01), Skolaude et al.
patent: 4595405 (1986-06-01), Agrawal et al.
patent: 4705548 (1987-11-01), Agrawal et al.

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