Patent · US Expired

Process and apparatus for the recovery of pure argon

US5592833A · kind A · utility

2Cited by

8References

21Claims

0Family size

Assignee

Linde GmbH · DE

Inventor

Anton Moll · Raisting, DE

Key dates

Filing date	Feb 23, 1995
Grant date	Jan 14, 1997
Priority date	—
Expiry date	Feb 23, 2015

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S62/924
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

In recovering pure argon product, air is separated in a rectification system, comprising at least one air separating column (9), a crude argon column (17) and a pure argon column (25). A crude argon fraction (24) is withdrawn from the crude argon column (17) and introduced at an intermediate locality into the pure argon column (25). The head of the pure argon column (25) is cooled by indirect heat exchange (29). From the pure argon column (25) a residual fraction (31) containing essentially nitrogen is withdrawn overhead and from the bottom a pure argon fraction (26) is withdrawn. The mass transfer in the pure argon column (25) is brought about at least in part by a packing (33, 34).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.