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13 EP 2 591 130 B1 14 exceeded 90°C the lithium extraction yield was more than 90% after the reaction time of 10 minutes, and the yield was more than 95% after 15 minutes. [Comparative Example 1] [0097] The impurities, including magnesium, calcium and boron, were removed from the brine, and 7g/L of sodium carbonatewas added to the remaining filtrate dis- solved with the concentration of lithium ions being 0.917g/L. The filtrate was maintained to be reacted for 15 to 60 minutes, while elevating the temperature to 90°C [0098] Once the reaction was completed, the precipi- tated lithium carbonate was separated by filtering, and the remaining filtrate was collected to measure the con- centration of lithium. The result is shown in FIG. 8. [0099] As shown in FIG. 8, even if sodium carbonate was added to the lithium bearing solution, and reacted for 15 to 60 minutes, the concentration of lithium in the filtrate was almost identical to the concentration of lithium in the brine prior to the reaction. [0100] In other words, due to its high solubility of ap- proximately 13g/L, a large amount of lithium carbonate can be dissolved in the water. Therefore, it would be ex- tremely difficult to extract a small amount of lithium dis- solved in the brine in the form of lithium carbonate, unless the precipitation amount of lithium carbonate is increased by evaporation and concentration of the brine. [0101] By precipitating lithium dissolved in the brine by using lithium phosphate having a low solubility, the proc- esses of evaporation as well as concentration of brine are not required, and the economical extraction of lithium with high extraction yield, while minimizing the loss of lithium, may be possible. [0102] In the foregoing specification, specific embodi- ments of the present invention have been described. [0103] Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be in- cluded within the scope of present invention. The bene- fits, advantages, solutions to problems, and any ele- ment(s) that may cause any benefit, advantage, or solu- tion to occur or become more pronounced are not to be construed as a critical, required, or essential features or elements as described herein. Claims 1. A method of economical extraction of lithium from a lithium bearing solution by adding a phosphorous supplying material to the solution to precipitate lith- ium phosphate from the dissolved lithium, and wherein the lithium bearing solution is brine, and the concentration of lithium in the brine is 0.1 g/L or more. 2. The method according to claim 1, wherein the phos- phorous supplying material is one selected from the group consisting of phosphorous, phosphoric acid, phosphate, and a mixture thereof. 3. The method according to claim 1, wherein the total concentration of the lithium phosphate in brine is 0.39g/L or more. 4. The method according to claim 1, wherein the con- centration of lithium in the lithium bearing solution is 0.1g/L to 1.5g/L. 5. The method according to claim 1, wherein the meth- od further comprises a step of precipitating and re- moving impurities in the brine, including magnesium, boron, calcium or a mixture thereof by adding a hy- droxyl ion in the brine prior to precipitating lithium phosphate from dissolved lithium by adding a phos- phorous supplying material in the brine. 6. The method according to claim 1, wherein the step of precipitating lithium phosphate from dissolved lith- ium by adding a phosphorous supplying material is performed at room temperature or higher. 7. The method according to claim 1, wherein the step of precipitating lithium phosphate from dissolved lith- ium by adding a phosphorous supplying material is performed at 90°C or higher. 8. The method according to claim 5, wherein the hy- droxyl ion is a negative ion of sodium hydroxide. 9. The method according to claim 5, wherein the step of precipitating and removing impurities in the brine, including magnesium, boron, calcium, or a mixture thereof by adding a hydroxyl ion in the brine is a step of precipitating and removing impurities in the brine, including magnesium, boron and calcium, by adding a hydroxyl ion in the brine. 10. The method according to claim 9, wherein the step of precipitating and removing impurities in the brine, including magnesium, boron and calcium, by adding a hydroxyl ion in the brine further comprises the steps of: (a) producing magnesium hydroxide from the magnesium by adding a hydroxyl ion in the brine; (b) absorbing boron in the magnesium hydrox- ide to extract magnesium and boron by co-pre- cipitating magnesium and boron; and (c) precipitating calcium by adjusting the pH of the filtrate from which magnesium and boron are removed to be at least 12. 11. The method according to claim 10, wherein the step of producing magnesium hydroxide from the mag- nesium by adding a hydroxyl ion in the brine is a step 5 10 15 20 25 30 35 40 45 50 55 8PDF Image | Patent Lithium European Patent Spec
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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 | RSS | AMP |