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US 6,274,102 B1Granted
Compact deoxo system
AssigneePraxair Technology, Inc.
InventorJaak Stefaan Van den Sype
Life of this patent
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Abstract
A small system for efficiently producing low flow rates of a nitrogen or nitrogen/hydrogen stream from an initial feed which also contains oxygen, employing a defined catalytic reactor unit producing product at very high space velocities.
Claims4
Apparatus for producing an oxygen-free nitrogen product stream comprising:
- (A) means for providing an initial stream comprising nitrogen in a concentration of at least 98 mole percent and oxygen in a concentration within the range of from 0.1 to 2.0 mole percent;
- (B) means for passing hydrogen into said initial stream to form a reactor feed stream having a hydrogen concentration within the range of from 2 to 20 times that of the oxygen concentration but not more than twice the oxygen concentration plus 4 mole percent;
- (C) a catalytic reactor containing a catalyst bed comprising noble metal having a specific surface area exceeding 1 m2/gram on a ceramic carrier having a specific surface area exceeding 100 m2/gram;
- and
- (D) means for passing the reactor feed stream into the catalytic reactor, means for reacting hydrogen with essentially all of the oxygen in the reactor feed stream within the catalytic reactor at a pressure of 100 pounds per square inch gauge or higher to form water, and means for withdrawing a water-containing, oxygen-free nitrogen product stream from the catalytic reactor at a space velocity of at least 60,000/hr.
2 more elements
Dependencies are inferred from the claim text.