Patent ID: 6505482
Filing Date: 2003-01-14
Classification: B01D,C01B,C01P

Abstract:
A method for delivery of a purified nitrous oxide gas in a liquefied state comprising:(a) converting a liquefied nitrous oxide devoid of light impurities to a nitrous oxide gas by passing said liquefied nitrous oxide through a vaporizer; (b) routing said nitrous oxide gas to a first dry bed vessel, wherein at least one acid gas is absorbed; (c) conveying said nitrous oxide gas from said first dry bed vessel to a second dry bed vessel, wherein water and ammonia are removed, providing said purified nitrous oxide gas; (d) conveying said purified nitrous oxide gas from said second dry bed vessel to a product tank, wherein said purified nitrous oxide gas is recondensed, forming a liquefied purified nitrous oxide; and (e) conveying said liquefied purified nitrous oxide from said product tank to at least one holding vessel via a manifold.