Oxygen-selective adsorbent having fast adsorption rate and preparation method thereof
| Title: | Oxygen-selective adsorbent having fast adsorption rate and preparation method thereof |
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| Patent Number: | 9,192,911 |
| Publication Date: | November 24, 2015 |
| Appl. No: | 13/980094 |
| Application Filed: | January 26, 2012 |
| Abstract: | Provided is a preparation method of an oxygen-selective adsorbent selectively adsorbing oxygen in the air and an oxygen-selective adsorbent prepared thereby. The preparation method includes: preparing BaMg(CO3)2 particles or particles in which MgCO3 or Mg(OH)2 are attached to the outside of BaMg(CO3)2; and sintering the particles at a high temperature. The oxygen-selective adsorbent according to the present invention may adsorb oxygen in the air at a fast rate as compared with an existing oxygen-selective adsorbent and have high thermal stability and excellent oxygen adsorptivity. |
| Inventors: | Park, Jong Ho (Daejeon, KR); Yi, Kwang Bok (Daejeon, KR); Kim, Jong Nam (Daejeon, KR); Beum, Hee Tae (Daejeon, KR); Park, Jong Kee (Daejeon, KR); Ko, Chang Hyun (Daejeon, KR); Han, Sang Sup (Daejeon, KR); Cho, Soon Haeng (Daejeon, KR); Jung, Taesung (Daejeon, KR) |
| Assignees: | KOREA INSTITUTE OF ENERGY RESEARCH (Daejeon, KR) |
| Claim: | 1. A preparation method of an oxygen-selective adsorbent selectively adsorbing oxygen in the air, the preparation method comprising: preparing BaMg(CO 3) 2 particles or particles in which MgCO 3 or Mg(OH) 2 are attached to the outside of BaMg(CO 3) 2 ; and sintering the particles at 700 to 800° C. under hydrogen atmosphere. |
| Claim: | 2. The preparation method of claim 1 , wherein in the particles in which MgCO 3 or Mg(OH) 2 are attached to the outside of BaMg (CO 3) MgCO 3 or Mg(OH) 2 are attached to the outside of BaMg(CO 3) 2 at a molar ratio of 1to 10based on BaMg(CO 3) 2 . |
| Claim: | 3. The preparation method of claim 1 , wherein the BaMg(CO 3) 2 particles are prepared by dispersing a mixture of a compound containing barium and carbonate in distilled water and adding a magnesium carbonate precursor thereto. |
| Claim: | 4. The preparation method of claim 3 , wherein the compound containing barium is BaCO 3 or BaCl 2 . |
| Claim: | 5. The preparation method of claim 3 , wherein the carbonate is Na 2 CO 3 . |
| Claim: | 6. The preparation method of claim 3 , wherein the magnesium carbonate precursor is Mg(NO 3) 2 ·6H 2 O or MgCO 3 ·3H 2 O. |
| Claim: | 7. The preparation method of claim 1 , wherein the particles in which MgCO 3 or Mg(OH) 2 are attached to the outside of BaMg(CO 3) 2 , are prepared by dispersing a mixture of a compound containing barium and carbonate in distilled water, adding a magnesium carbonate precursor thereto to obtain particles, filtering and washing the obtained particles, dispersing the washed particles in distilled water again, adding the magnesium carbonate precursor thereto, performing a ultrasonic treatment, and then adding aqueous ammonia thereto. |
| Claim: | 8. The preparation method of claim 7 , wherein the compound containing barium is BaCO 3 or BaCl 2 . |
| Claim: | 9. The preparation method of claim 7 , wherein carbonate is Na 2 CO 3 . |
| Claim: | 10. The preparation method of claim 7 , wherein the magnesium carbonate precursor is Mg(NO 3) 2 ·6H 2 O or MgCO 3 .3H 2 3 ·3H 2 O. |
| Patent References Cited: | 3324654 June 1967 Squires 5135548 August 1992 Golden et al. 5478543 December 1995 Murota et al. 5536302 July 1996 Golden et al. 10-085589 April 1998 |
| Other References: | Smykatz-Kloss, W. “Differential Thermal Analysis: Application and Results in Mineralogy” (1974). cited by examiner Bottcher et al. “The vibrational spectra of BaMg(CO3)2 (norsethite)” Mineralogical Magazine, Apr. 1997, vol. 61, pp. 249-256. cited by examiner |
| Primary Examiner: | Godenschwager, Peter F |
| Attorney, Agent or Firm: | Sughrue Mion, PLLC |
| Accession Number: | edspgr.09192911 |
| Database: | USPTO Patent Grants |
| Language: | English |
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