Patent · US Expired

Process for the preparation of high-purity liquid nitrogen

US5589151A · kind A · utility

5Cited by

6References

36Claims

0Family size

Assignee

L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventor

Daniel Gary · Montigny-le-Bretonneux, FR

Key dates

Filing date	Jan 25, 1995
Grant date	Dec 31, 1996
Priority date	—
Expiry date	Jan 25, 2015

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF25J2220/44
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

In a process for the preparation of high-purity liquid nitrogen substantially free from at least one of the impurities hydrogen, carbon monoxide and oxygen, liquid nitrogen to be purified is placed in contact with an adsorbent and high-purity liquid nitrogen is recovered. A device for making use of this process includes a source of liquid nitrogen to be purified connected by a conduit to the entry of a reactor containing an adsorbent, the reactor exit being provided with a connecting conduit.

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