Argon production

Details Argon production Argon production

1996-11-18

1997-11-04

Kilner, Christopher

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62924, F25J 304

Patent

active

056827679

ABSTRACT:
A process and system for producing an argon-enriched stream comprising a multiple column air separation system, a first crude argon column, and a second crude argon column is provided. The improved process involves removing a vapor stream from the upper portion of the first argon column; reducing the pressure of the vapor in a pressure reducing device; and then flowing the reduced pressure vapor to a second argon column which operates at a lower operating pressure relative to the first argon column.

REFERENCES:
patent: 4842625 (1989-06-01), Allam et al.
patent: 4983194 (1991-01-01), Hopkins et al.
patent: 5426946 (1995-06-01), Corduan et al.
patent: 5505051 (1996-04-01), Darredeau et al.
Gruber, Wolf, "Recovery of High Purity Argon by Rectification," Industrial Gases Seminar, Jakarta, Sep. 23.sup.rd -24.sup.th, 1993.
Shinskey, F.G., "Distillation Control for Productivity and Energy Conservation," pp. 61-63, McGraw-Hill, 1977.

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