Patent · US Active

Plant for producing oxygen by cryogenic air separation

US10401083B2 · kind B2 · utility

0Cited by

1References

18Claims

0Family size

Assignee

Linde GmbH · DE

Inventors

Stefan Lochner · Grafing, DE
Thomas Nohlen · Oberhaching, DE
Lars Kirchner · Dresden, DE
Dimitri GOLUBEV · Geretsried, DE

Key dates

Filing date	Mar 10, 2016
Grant date	Sep 3, 2019
Priority date	—
Expiry date	Mar 10, 2036

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF25J2290/12
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The plant is used for producing oxygen by cryogenic air separation. The plant has a high-pressure column, a low-pressure column and a main condenser. An argon-elimination column is in fluid connection with an intermediate point of the low-pressure column and is connected to an argon-elimination column head condenser. An auxiliary column has a sump region, into which gas is introduced from the argon-elimination column head condenser. The head of the auxiliary column is connected to a return flow liquid line, in order to introduce a liquid stream from the high-pressure column or the head condenser. The liquid stream has an oxygen content which is at least equal to that of air. At least one part of the crude liquid oxygen from the sump of the high-pressure column is fed to the auxiliary column at a first intermediate point.

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