Argon purification

Details Argon purification Argon purification

1989-11-30

1991-05-28

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62 24, F25J 304

Patent

active

050191454

ABSTRACT:
A process and apparatus for air separation by low temperature rectification are described in which argon is obtained exclusively by rectification. A crude argon column (24) is equipped with at least 150 theoretical plates in the form of low pressure drop packing so that, in it, a substantially complete separation of the oxygen is possible, e.g., less than about 10 ppm, preferably less than 1 ppm oxygen.

REFERENCES:
patent: 2861432 (1958-11-01), Haselden
patent: 4057407 (1977-11-01), Bigi
patent: 4088464 (1978-10-01), Bigi
patent: 4296050 (1981-10-01), Meier
patent: 4838913 (1989-06-01), Victor et al.
patent: 4871382 (1989-10-01), Thorogood et al.
Chemical Abstracts, vol. 80, No. 6, Mar. 25, 1974, 61607b.
Ullmans Encyklopadie der technischen Chemie, vol. 2, pp. 534-535.

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