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3 EP 2 591 130 B1 4 [0015] In one embodiment of the present invention, the concentration of the lithium phosphate may be 0.39g/L or more. [0016] In the present invention, the concentration of lithium in the lithium bearing solution may be 0.1g/L or more. More specifically, the concentration may be 0.2g/L or more, or 0.5g/L or more. The concentration of 60g/L or more, however, may not be economical because a great amount of time is required for the high-enrichment of lithium. [0017] In one embodiment of the present invention, the method may further comprise a step of extracting lithium phosphate by filtering the precipitated lithium phosphate from the lithium bearing solution. [0018] In one embodiment of the present invention, the lithium bearing solution may be brine. [0019] In one embodiment of the present invention, the brine may contain impurities including magnesium, bo- ron, calcium, or a mixture thereof. [0020] In one embodiment of the present invention, pri- or to precipitating lithium phosphate from dissolved lith- ium by adding a phosphorous supplying material in the brine, the method may further comprise a step of precip- itating and removing impurities in the brine, including magnesium, boron, calcium, or a mixture thereof by add- ing a hydroxyl ion in the brine. [0021] In one embodiment of the present invention, the step ofprecipitating lithium phosphate from dissolved lith- ium by adding a phosphorous supplying material may be performed at room temperature or higher. [0022] In one embodiment of the present invention, the hydroxyl ion may be a negative ion of sodium hydroxide. [0023] In one embodiment of the present invention, the step of precipitating and removing impurities in the brine, including magnesium, boron, calcium, or a mixture there- of by adding a hydroxyl ion in the brine may be a step of precipitating and removing impurities in the brine, includ- ing magnesium, boron and calcium, by adding a hydroxyl ion in the brine. [0024] In one embodiment of the present invention, the step of precipitating and removing impurities in the brine, including magnesium, boron and calcium, by adding a hydroxyl ion in the brine may further comprise the steps of:(a) producing magnesium hydroxide from the magne- sium by adding a hydroxyl ion in the brine; (b) absorbing boron inthe magnesium hydroxide to extract magnesium and boron by co-precipitating 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. [0025] In one embodiment of the present invention, the step of producing magnesium hydroxide from the mag- nesium by adding a hydroxyl ion in the brine may be a step of producing magnesium hydroxide from the mag- nesium by adding a hydroxyl ion while maintaining the pH of the brine to be in the range of 8.5 to 10.5. The step of absorbing boron in the magnesium hydroxide to extract magnesium and boron by co-precipitatingmagnesium and boron may be performed by absorbing the boron in the brine including the magnesium hydroxide having a pH ranging from 8.5 to 10.5 inthe magnesium hydroxide to extract magnesium and boron by co-precipitating mag- nesium and boron. The step of producing magnesium hydroxide from the magnesium by adding a hydroxyl ion in the brine, while maintaining the pH of the brine to be in the range of 8.5 to 10.5 by adding a hydroxyl ion in the brine, and the step of absorbing the boron in the brine including the magnesium hydroxide having apH ranging from 8.5 to 10.5 in the magnesium hydroxide to extract magnesium and boron by co-precipitatingmagnesium and boron may be performed simultaneously. [0026] In another embodiment of the present invention, the step of precipitating lithium phosphate from dissolved lithium by adding a phosphorous supplying material may be followed by a step of filtering the precipitated lithium phosphate and extracting it in the form of a high purity powder. [0027] In yet another embodiment of the present in- vention, thestep of precipitating calcium by adjusting the pH of the filtrate from which magnesium and boron are removed to be at least 12 may be a step of precipitating calcium hydroxide or calcium carbonate from calcium by adding hydroxyl ion, carbonate ion, or a mixture thereof. Advantageous Effects of Invention [0028] In accordance with an embodiment of the present invention, without the processes of evaporation and concentration of brine for a long period of time, lithium dissolved in the brine may be economically extracted as lithium with high extraction yield by precipitation using lithium phosphate having low solubility. Brief Description of Drawings [0029] FIG. 1 is a graph depicting the surface charge change of magnesium hydroxide according to the pH of the brine. FIG. 2 is a graph depicting the concentration change of magnesium ions in the filtrate relative to the NaOH addition amount. FIG. 3 is a graph depicting the concentration change of boron ions in the filtrate relative to the NaOH ad- dition amount. FIG. 4 is a graph depicting the concentration change of lithium ions in the filtrate relative to the NaOH ad- dition amount. FIG. 5 is a graph depicting the concentration change of calcium ions in the filtrate relative to the NaOH addition amount. 5 10 15 20 25 30 35 40 45 50 55 3PDF 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 (Standard Web Page)