US9504996B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9504996-B2 |
| Application number | US-201214366574-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 19, 2012 |
| Priority date | Dec 20, 2011 |
| Publication date | Nov 29, 2016 |
| Grant date | Nov 29, 2016 |
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[Problem] To provide a strontium ion-exchanged clinoptilolite having excellent nitrogen-absorbing properties; and a method for producing the strontium ion-exchanged clinoptilolite. [Solution] Synthetic clinoptilolite having a strontium ion at an ion exchange site thereof is useful as a nitrogen adsorbent. The synthetic clinoptilolite can be produced by bringing a solution containing a strontium ion into contact with synthetic clinoptilolite under ambient pressure to cause ion exchange.
Opening claim text (preview).
The invention claimed is: 1. A synthetic clinoptilolite comprising strontium ions at ion exchange sites thereof, wherein the synthetic clinoptilolite has a pore volume (pv) of 0.5 mL/g or more (pv≧0.5 mL/g) for pores having pore diameters (pd) of 3 nm≦pd≦10,000 nm. 2. The synthetic clinoptilolite according to claim 1 , wherein at least 35 mol % of ions at the ion exchange sites are strontium ions. 3. The synthetic clinoptilolite according to…
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