Patent · US Active

System for pre-purification of a feed gas stream

US11850553B2 · kind B2 · utility

1Cited by

8References

22Claims

0Family size

Assignee

Praxair Technology, Inc. · US

Inventors

Ralph J. Mancini · Danbury, US
Cem E. Celik · Tonawanda, US
Matthias Grahl · Munich, DE
Arthur C. Selover · Tonawanda, US
Sesha Hari Vemuri · Tonawanda, US
Helko Schneider · Wolfratshausen, DE

Key dates

Filing date	Jan 29, 2021
Grant date	Dec 26, 2023
Priority date	—
Expiry date	Dec 25, 2041

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02C20/40
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A system and method of pre-purification of a feed gas stream is provided that is particularly suitable for pre-purification of a feed air stream in cryogenic air separation unit. The disclosed pre-purification systems and methods are configured to remove substantially all of the hydrogen, carbon monoxide, water, and carbon dioxide impurities from a feed air stream and is particularly suitable for use in a high purity or ultra-high purity nitrogen plant. The pre-purification systems and methods preferably employ two or more separate layers of hopcalite catalyst with the successive layers of the hopcalite separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layers. Alternatively, the pre-purification systems and methods employ a hopcalite catalyst layer and a noble metal catalyst layer separated by a zeolite adsorbent layer that removes water and carbon dioxide produced in the hopcalite layer.

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