| 摘要 |
<p>PURPOSE:To efficiently produce an adsorbent for separating oxygen and nitrogen by subjecting zeolite based on silica and alumina to ion exchange with cations contg. Ca and Sr. CONSTITUTION:Zeolite based on silica and alumina and having a crystal structure of A type, X type, Y type, L type, etc., is subjected to ion exchange with cations contg. Ca and Sr to obtain an adsorbent for separating oxygen and nitrogen. An adsorption tower is packed with this adsorbent and a gaseous mixture contg. nitrogen and oxygen is passed through the tower to produce oxygen-rich gas. When the adsorbent is satd. with nitrogen, the feed of the gaseous mixture is stopped and nitrogen-rich gas is removed from the adsorbent. The pref. content of Sr is 0-65wt.% of the content of Ca at the time of producing the adsorbent.</p> |
