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3 EQUIPMENT, MATERIALS, AND PROCEDURES Lithium precipitation studies used which was precipitated by sparging with brine being sent to the injection well of a power generation test facility in the Imperial Valley. The production well was located near the southern end of the Salton Sea (fig. 1) and drew brine from for analysis. Part of the study on Ca- the Niland Reservoir. The brine was con- Li separation used synthetic mixtures centrated by removing 25 to 33 pet of its prepared from reagent-grade chlorides. mass as steam in the power generation Analyses of salts dissolved in tetra- facility and had the analysis shown in hydrofuran (THF) were accomplished by table 1. All other cations were present diluting the solution with an equal vol- at concentrations of less than 50 mg/L. Table 1. - Concentrations of selected components in a typical brine, mg/L ume of water, evaporating to the origi- nal volume, and analyzing the aqueous solutions. Na••••••••• 58,000 Ca•• til _ • • • • • 25,000 K•••••••••• 12,000 Mn••••••••• 680 Sr ••••••.•• 520 Zn••••••••• 270 B•••••••••• 250 Si02 ••••••• 230 Fe ••••••••• 190 Li..••••••. 170 Ba••••••••• 115 Mg••••••••• 84 ph••••••••• 49 Precipitation tests were performed with standard bench-scale equipment and reagent-grade chemicals. Brine samples were treated with lime at pH 8.5 and filtered to remove Fe, Mn, Pb, and Zn before lithium precipitation. Solu- tions were analyzed by atomic absorp- tion (AA) or inductively coupled plasma (ICP). Analyses by both methods agreed, although ICP gave lower detection lim- its. Precipitates were analyzed by dis- solution in an excess of HCl. The fi- nal volumes were measured, and the solu- tions were analyzed by AA or ICP. Acid- insoluble residues were filtered, washed, dried, and weighed. Emission spectros- copy showed that the residues were silica. Large-scale precipitation tests were performed at the well site. The equip- ment and operating procedures are dis- cussed under "Results and Discussion." The tests used commercial lime and aluminum chloride hexahydrate (ACH), CALIFORNIA gaseous HCl and washed with concentrated HCI. Test samples, including portions of the Li-Al precipitate, were shipped to the Bureau's Reno Research Center o46 ii scote, mi FIGURE 1. ~ Location map of well site. y~~---- MEXICOPDF Image | Recovering Lithium Chloride From a Geothermal Brine 1984
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Product and Development Focus for Infinity Turbine
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