Abstract:
본 발명은 해수의 간접탄산화 반응을 이용하여 고순도의 배터라이트(vaterite)형 및 칼사이트(calcite)형 탄산칼슘을 제조하는 방법에 관한 것으로, 해수를 용제로 이용하여 알칼리 산업부산물(CKD, PSA), CaO, Ca(OH) 2 의 칼슘을 용출한 것으로써, 해수에 함유된 마그네슘을 이용해 칼슘을 고효율로 용출시킬 수 있고, 알칼리 산업부산물을 이용해 고순도 탄산칼슘의 생성을 방해하는 해수 내 마그네슘을 침전시킴으로써 탄산칼슘의 순도를 높일 수 있으며, 고비용의 용제를 대신하여 해수를 활용함으로써 99.9% 이상 고순도 배터라이트형 및 칼사이트형 탄산칼슘을 경제적으로 제조할 수 있다.
Abstract:
Systems and methods are provided for recycling actinides from molten chloride fuel salts that have been employed as fuel within a molten salt nuclear reactor. The used molten chloride fuel salts can contain soluble fission products (e.g., non-actinide fission products) that contaminate the molten chloride fuel salt mixture, as well as recoverable actinide chlorides. In one aspect, the contaminating non-actinide fission products can be separated from the molten chloride fuel salt mixture. Subsequently, actinide chlorides remaining within the molten fuel salts can be partitioned into a liquid bismuth phase. These actinides can then be re-chlorinated (e.g., oxidized) to strip them out of the liquid bismuth phase and into a clean molten chloride salt mixture that does not contain contaminating non-actinide fission products and that can be pumped back to the nuclear reactor core as fuel.
Abstract:
The present invention relates to the recycling process of electronic waste resources to recover metals of value. More particularly, it relates to eco-friendly yet efficient hydrometallurgical processes to recover metal values from waste monolithic ceramic capacitors. In the proposed method, the source material such as mother boards having MLCC is pulverized using a ball mill to dislodge various components such as monolithic ceramic capacitors (MLCC) to form a powdery mixture of components. The mixture of components is then sieved. The MLCC powder of particular size range is then subjected to hydrometallurgical process. The process then transfers the precious metals into solution by leaching process followed by selective precipitation, purification, cementation and final recovery of metals.
Abstract:
Processes, systems, and methods for selectively regenerating an ion exchange resin generally comprises washing the ion exchange resin with an elution agent that encourages only selected contaminants, and especially selected radioactive isotopes, to disengage or decouple from the resin and enter solution in the elution agent, which thereafter is identified as the elution agent solution. The elution agent solution is then passed through a column of isotope-specific media (ISM). When the selected radioactive isotopes within the elution agent solution come into contact with the constituent media isotopes of the ISM, the selected radioactive isotopes are retained on the reactive surface areas of the ISM or within the interstitial spaces of the porous structures of the constituent media isotopes of the ISM. In some embodiments, the constituent media isotopes of the ISM are embedded, impregnated, or coated with the specific radioactive isotope that the particular ISM are adapted to separate.
Abstract:
Submersible media filters and submersible columns for use in removing radioactive isotopes and other contaminants from a fluid stream, such as a fluid stream from the primary coolant loop of a nuclear reactor system or a fluid stream from a spent-fuel pool. Generally, these submersible media filters and submersible columns are adapted to be submersed in the fluid stream, and additionally the filters are adapted to be vitrified after use, resulting in a stabilized, non-leaching final waste product with a substantially reduced volume compared to the original filter. In several embodiments, the submersible media filters and submersible columns include isotope-specific media (ISM).
Abstract:
The present invention is directed to a water treatment composition, comprising: calcium hypochlorite coated with a coating comprising at least one hydrated or anhydrous salt. The present invention is also directed to a water treatment composition, comprising: (a) an inner core layer comprising calcium hypochlorite; (b) one or more interlayers of selected salts positioned on top of said inner core layer, and (c) one or more outer layers o selected salts positioned on top of said interlayer(s).