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5.8. Summary The preparation of FP as an adsorbent was studied. It was challenging to prepare ferric phosphate from FPD and reagent-grade LFP, but persulfate oxidation of battery-grade LFP successfully made heterosite FP, which can be used for lithium extraction. Next, a variety of reducing agents was studied. Out of Cu+, TS and SF, TS and SF seemed appropriate for the lithium recovery reaction. The cuprous reduction experiments were not successful. With the adsorbent and reducing agents, all the experiments were carried out. By checking XRD patterns, it was found that FP was successfully reduced to LFP in most cases with a significant dependence on temperature. When sulfite is used for brine solution containing calcium ions, calcium sulfite salts were produced. At 65 °C, sodium iron phosphate was formed in the absence of lithium. Experimental results showed the lithium adsorption density could be the same as the theoretical value of 46.0 mg/g. For example, the value was 45.9 mg/g in the case of sulfite reduction at 65 °C. Lithium selectivity was also high. The selectivity over sodium, for instance, 2541 in the case of sulfite reduction at 45 °C. There were pH changes during experiments, but they didn’t have much impact on adsorption density and iron dissolution. However, 40% of iron was extracted when thiosulfate was used at 65 °C. The dissolution of iron can be prevented by pH control to ~ 7. When it comes to practical operation, FP and LFP should be recycled. The cycle of the loading and stripping test was repeated, and it was confirmed that FP and LFP could be recycled without degradation. In the last, kinetics was studied by using Pseudo first-order model and shrinking sphere model. These models were well fitted to experimental results and found that the lithium extraction reaction was chemical reaction controlled in both thiosulfate and sulfite cases. - 136 -PDF Image | LITHIUM EXTRACTION FROM BRINE using ion resin
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Product and Development Focus for Infinity Turbine
ORC Waste Heat Turbine and ORC System Build Plans: All turbine plans are $10,000 each. This allows you to build a system and then consider licensing for production after you have completed and tested a unit.Redox Flow Battery Technology: With the advent of the new USA tax credits for producing and selling batteries ($35/kW) we are focussing on a simple flow battery using shipping containers as the modular electrolyte storage units with tax credits up to $140,000 per system. Our main focus is on the salt battery. This battery can be used for both thermal and electrical storage applications. We call it the Cogeneration Battery or Cogen Battery. One project is converting salt (brine) based water conditioners to simultaneously produce power. In addition, there are many opportunities to extract Lithium from brine (salt lakes, groundwater, and producer water).Salt water or brine are huge sources for lithium. Most of the worlds lithium is acquired from a brine source. It's even in seawater in a low concentration. Brine is also a byproduct of huge powerplants, which can now use that as an electrolyte and a huge flow battery (which allows storage at the source).We welcome any business and equipment inquiries, as well as licensing our turbines for manufacturing.CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)