Patent ID: 6767386
Filing Date: 2004-07-27
Classification: B01D,Y10S

Abstract:
A method for producing nitrogen using a pressure swing adsorption (PSA) method with air as a raw material, comprising:having the air contact with an adsorbent that comprises a carbon molecular sieve selectively adsorbing oxygen to produce nitrogen with a purity ranging from 99% to 99.999% by using the pressure swing adsorption (PSA) method that conducts regeneration of the adsorbent under atmospheric pressure, wherein a period â€œTOâ€  needed for the carbon molecular sieve to adsorb an oxygen amount of 50% of a saturated oxygen adsorption amount starting from the beginning of oxygen supply is 5Ëœ10 seconds, and a period â€œTNâ€  needed for the carbon molecular sieve to adsorb a nitrogen amount of 50% of a saturated nitrogen adsorption amount starting from the beginning of nitrogen supply is larger than â€œTOâ€  by more than 41 times.