IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0606558
(2012-09-07)
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등록번호 |
US-8747786
(2014-06-10)
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발명자
/ 주소 |
- Visser, Ann E.
- Bridges, Nicholas J.
|
출원인 / 주소 |
- Savannah River Nuclear Solutions, LLC
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대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
4 |
초록
▼
A method for forming nanoparticles containing uranium oxide is described. The method includes combining a uranium-containing feedstock with an ionic liquid to form a mixture and holding the mixture at an elevated temperature for a period of time to form the product nanoparticles. The method can be c
A method for forming nanoparticles containing uranium oxide is described. The method includes combining a uranium-containing feedstock with an ionic liquid to form a mixture and holding the mixture at an elevated temperature for a period of time to form the product nanoparticles. The method can be carried out at low temperatures, for instance less than about 300° C.
대표청구항
▼
1. A method for forming nanoparticles including a uranium oxide, the method comprising: combining a uranium-containing feedstock with an ionic liquid to form a mixture;heating the mixture to a temperature of from about 100° C. to about 300° C.; andholding the mixture at the temperature for a period
1. A method for forming nanoparticles including a uranium oxide, the method comprising: combining a uranium-containing feedstock with an ionic liquid to form a mixture;heating the mixture to a temperature of from about 100° C. to about 300° C.; andholding the mixture at the temperature for a period of time sufficient to form the nanoparticles comprising a uranium oxide. 2. The method according to claim 1, wherein the mixture is basic. 3. The method according to claim 1, wherein the uranium-containing feedstock is a uranium salt. 4. The method according to claim 3, wherein the uranium salt is uranyl nitrate, uranyl acetate, uranyl oxalate, uranyl phosphate, uranium tetrafluoride, uranium chloride, uranyl sulfate, or mixtures thereof. 5. The method according to claim 1, wherein the ionic liquid includes a cation having a polar aromatic headgroup and a nonpolar alkyl side chain, the alkyl side chain including from 1 to about 12 carbon atoms. 6. The method according to claim 1, wherein the ionic liquid includes an imidazolium cation. 7. The method according to claim 6, wherein the imidazolium cation has a structure of: wherein Rn is an alkyl group of n carbon atoms and n is from 1 to about 12. 8. The method according to claim 1, wherein ionic liquid includes a tetrafluoroborate anion. 9. The method according to claim 1, wherein the mole ratio of the uranium-containing feedstock to the ionic liquid is from about 1:2 to about 1:5. 10. The method according to claim 1, the mixture further comprising a pH adjustor. 11. The method according to claim 10, wherein the pH adjustor is a strong base. 12. The method according to claim 11, wherein the pH adjustor is sodium hydroxide. 13. The method according to claim 10, wherein the mole ratio of the uranium-containing feedstock to the pH adjustor is from about 1:1 to about 1:3. 14. The method according to claim 1, the mixture further comprising a reducing agent. 15. The method according to claim 1, wherein the mixture is heated to a temperature of from about 150° C. to about 200° C. 16. The method according to claim 1, wherein the mixture is held at the temperature for a period of time of greater than about 12 hours. 17. The method according to claim 1, wherein the nanoparticles have an average diameter of from about 10 nanometers to about 900 nanometers. 18. The method according to claim 1, wherein the nanoparticles comprise uranium dioxide. 19. The method according to claim 1, wherein the nanoparticles comprise a mixture of two or more uranium oxides. 20. The method according to claim 1, further comprising enriching the uranium oxide. 21. The method according to claim 1, further comprising pressing, sintering, and shaping the nanoparticles to form a fuel pellet. 22. A method for forming nanoparticles comprising uranium dioxide, the method comprising: combining a uranium salt with an ionic liquid and a pH adjustor to form a mixture, the mixture being basic, the ionic liquid including a cation having the structure of: wherein Rn is an alkyl group of n carbon atoms and n is from 1 to about 12, the mole ratio of the uranium salt to the ionic liquid being from about 1:2 to about 1:5, the mole ratio of the uranium salt to the pH adjustor being from about 1:1 to about 1:3; heating the mixture to a temperature of from about 100° C. to about 300° C.; andholding the mixture at the temperature for a period of time from about 12 hours to about 72 hours to form the nanoparticles comprising uranium dioxide. 23. The method according to claim 22, the ionic liquid including a tetrafluoroborate anion. 24. The method according to claim 22, wherein the pH adjustor is sodium hydroxide. 25. The method according to claim 22, wherein the mixture is heated to a temperature of from about 150° C. to about 200° C. 26. The method according to claim 22, wherein the nanoparticles comprise the uranium dioxide and a second uranium oxide. 27. The method according to claim 22, the mixture further comprising a reducing agent.
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