Direct Lithium Extraction Provides Pathway for Energy Transition and Resource Recovery

_ This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 36361, “Lithium Extraction From Brine and Wastewater: A Sustainable Pathway for Energy Transition and Resource Recovery, ” by Mei Quen Yew, Santosh Mishra, and Afifah Azmi, Petronas, et al. The paper has not been peer-reviewed. Copyright 2026 Offshore Technology Conference. _ As the lightest metal and least-dense solid element on Earth, lithium possesses a unique set of physical and chemical characteristics that makes it the indispensable material of lithium-ion-battery technology. Consequently, lithium is projected to experience the most rapid growth in value of any critical mineral, outpacing other key metals such as copper, nickel, graphite, manganese, and rare earths. This paper explores the development of direct-lithium-extraction (DLE) technologies designed to recover lithium from unconventional feedstocks. DLE From Unconventional Resources As the ecological limitations of traditional lithium production become more apparent, the industry is pivoting toward more-sustainable practices. Central to this shift is the development of DLE technologies. These include geothermal brines—a byproduct of renewable energy production—and oilfield brines (petrobrines) and produced water (PW), both of which were formerly regarded as underused waste streams of the oil and gas sector. Both unconventional brines and PW are highly saline, complex waste streams containing significant concentrations of a variety of salts; various chains of hydrocarbons; and precious minerals including lithium, boron, magnesium, and calcium. Lithium extraction from brines and PW has evolved significantly, with several technologies emerging such as adsorption, ion exchange (IEX), membrane separation, and solvent extraction (SX). Sorbents such as lithium manganese oxide (LMO) and aluminium hydroxide have been identified as highly selective materials for lithium adsorption. Furthermore, electrochemical methods, including electrodialysis and capacitive deionization, actively are being researched for their potential to improve lithium recovery rates while maintaining cost efficiency. Much of the complete paper provides research drawn from a literature review on the subject. DLE Technologies for Lithium Extraction The compete paper includes discussions of companies that have deployed the technologies described in the following subsections. Adsorption. Adsorption-based DLE uses specialized aluminium-based sorbents, such as lithium-aluminium layered double hydroxides, to selectively capture lithium chloride (LiCl) from complex aqueous environments. The technology’s working principle centers on a “structural memory effect” wherein lithium ions intercalate into specific octahedral spaces within the aluminium hydroxide layers. Unlike chemical-exchange methods, this process is physically driven and optimized by three critical factors: a minimum lithium concentration, high salinity to disrupt the lithium ion’s hydration shell, and elevated temperatures to accelerate sorption kinetics. Once the sorbent is saturated, the LiCl is recovered using a strip solution of warm water. This mechanism minimizes the use of harsh chemical reagents and maintains the structural integrity of the resin, allowing for a more-sustainable recovery cycle.