Precipitation and solvent extraction of magnesium from lithium-chloride solution by di-(2-ethylhexyl) phosphoric acid in the presence of lactic acid as a complexing agent

Ghorbanzadeh, Milad; Gorzin, Hesamoddin; Eshtehardi, Hamid Ahmadi

doi:10.1088/2053-1591/aad1c4

Cited by 2 publications

(1 citation statement)

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“…Lithium recovery was in the range of 50% for higher lithium waters; however, magnesium and calcium recoveries were almost 100% [53]. D2EHPA has been proposed for use in battery recycling to remove manganese, iron, aluminum, copper, and cobalt since D2EHPA is not selective for lithium in the presence of these other ions [201][202][203][204].…”

Section: Extractants Cas Number Formula Structural Formulamentioning

confidence: 99%

Technology for the Recovery of Lithium from Geothermal Brines

2021

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Lithium is the principal component of high-energy-density batteries and is a critical material necessary for the economy and security of the United States. Brines from geothermal power production have been identified as a potential domestic source of lithium; however, lithium-rich geothermal brines are characterized by complex chemistry, high salinity, and high temperatures, which pose unique challenges for economic lithium extraction. The purpose of this paper is to examine and analyze direct lithium extraction technology in the context of developing sustainable lithium production from geothermal brines. In this paper, we are focused on the challenges of applying direct lithium extraction technology to geothermal brines; however, applications to other brines (such as coproduced brines from oil wells) are considered. The most technologically advanced approach for direct lithium extraction from geothermal brines is adsorption of lithium using inorganic sorbents. Other separation processes include extraction using solvents, sorption on organic resin and polymer materials, chemical precipitation, and membrane-dependent processes. The Salton Sea geothermal field in California has been identified as the most significant lithium brine resource in the US and past and present efforts to extract lithium and other minerals from Salton Sea brines were evaluated. Extraction of lithium with inorganic molecular sieve ion-exchange sorbents appears to offer the most immediate pathway for the development of economic lithium extraction and recovery from Salton Sea brines. Other promising technologies are still in early development, but may one day offer a second generation of methods for direct, selective lithium extraction. Initial studies have demonstrated that lithium extraction and recovery from geothermal brines are technically feasible, but challenges still remain in developing an economically and environmentally sustainable process at scale.

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