Selective Recovery of Lithium from Geothermal Brines

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Selective Recovery of Lithium from Geothermal Brines ( selective-recovery-lithium-from-geothermal-brines )

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Where QLi and QM represent the concentration of lithium and a generic metal ion M in the regeneration solution (mg Li or M /L regeneration solution), and CLi and CMe are the concentrations of lithium and metal ion M in the brine (mg Li or M/L brine) tested. The concentrations of lithium ion and other metal ions in the aqueous solutions were tested by ion-exchange chromatography. Lithium Adsorption Capacity and Selectivity Using Synthetic Brines The hybrid sorbent generation was tested for its lithium adsorption and selectivity under variable conditions, including pH, composition, and temperature. In a typical experiment, the hybrid nanocomposite fixed bed was tested for its adsorption of Li+ from a synthetic brine containing 255 ppm Li, 10,570 ppm Na, and 10,400 ppm of K in a pH 6 sodium phosphate buffer solution at 50°C. The brine was passed through the column at a flow rate of 27 BV per hour (in which BV is the bed volume defined as BV= Lr2 with L equal to the length of the sorbent packed bed and r is the radius of the column), and the exiting brine was collected in small fractions. The lithium content of each fraction was measured, and the adsorption experiment was continued until the sorbent was saturated and the exiting brine had the same lithium content as the feed. The sharp breakthrough adsorption curve (Figure 2) indicates that the lithium uptake is fast. Figure 2: Breakthrough Curve of Li+ The graph above shows data from a fixed column packed with hybrid nanocomposite sorbent. The brine’s tested composition was: 255 ppm Li, 10,570 ppm Na and 10,400 ppm of K in a pH 6 0.4 M sodium phosphate buffer solution (T= 70oC, flow rate 27 BV/hr). Source: SRI International The lithium capacity and selectivity in the presence of high concentrations of Na and K ion are shown in Table 2. The lithium capacity is calculated from the amount of the lithium released by treatment with 0.5 M HCl, after the sorbent was saturated with lithium. 13

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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.

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