Patent · US Expired

Process and unit for the production of a fluid enriched in oxygen by cryogenic distillation

US6434973B1 · kind B1 · utility

0Cited by

3References

20Claims

0Family size

Assignee

L'Air Liquide, Société Anonyme à Directoire et Conseil de Surveillance pour l'Étude et l'Exploitation des Procédés Georges Claude · FR

Inventor

Benoit Davidian · Saint-Maur-des-Fossés, FR

Key dates

Filing date	Apr 4, 2001
Grant date	Aug 20, 2002
Priority date	—
Expiry date	Apr 4, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF25J2245/58
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A plant for the separation of air includes at least three columns, including an auxiliary column and two other columns, of which at least one is fed with air and of which that operating at the lowest pressure operates between 2 and 10 bar. A flow between 40 and 95 mol % of argon originating from the auxiliary column is optionally mixed with a gas enriched in nitrogen from the column operating at the lowest pressure. The auxiliary column operates at the same pressure as the column from which it is fed.

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