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Related Concept Videos

Extraction: Advanced Methods00:56

Extraction: Advanced Methods

415
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
415
Electrolysis03:00

Electrolysis

26.0K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.0K
Electrodeposition01:08

Electrodeposition

597
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
597
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

1.7K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.7K
Acid Halides to Ketones: Gilman Reagent01:14

Acid Halides to Ketones: Gilman Reagent

2.7K
Lithium dialkyl cuprate, also known as Gilman reagents, selectively reduces acid halides to ketones. The acid chloride is treated with Gilman reagent at −78 °C in the presence of ether solution to produce a ketone in good yield.
As shown below, the mechanism proceeds in two steps. First, one of the alkyl groups of the reagent acts as a nucleophile and attacks the acyl carbon of the acid chloride to form a tetrahedral intermediate. This is followed by the reformation of the carbon–oxygen...
2.7K

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Lithium extraction from low-quality brines.

Sixie Yang1,2, Yigang Wang1, Hui Pan1

  • 1Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, China.

Nature
|December 11, 2024
PubMed
Summary
This summary is machine-generated.

Efficient lithium extraction from low-quality brines is crucial for environmental sustainability and meeting demand for electric vehicles. This review covers methods to overcome challenges like low concentrations and high magnesium-to-lithium ratios in these abundant resources.

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Area of Science:

  • Materials Science
  • Environmental Science
  • Chemical Engineering

Background:

  • Growing demand for lithium in electric vehicles and renewable energy necessitates sustainable extraction methods.
  • Traditional lithium sources (hard-rock ores, salar brines) face environmental and supply chain challenges.
  • Low-quality brines offer vast, geographically distributed reserves but present extraction difficulties.

Purpose of the Study:

  • To review recent advances in lithium extraction from low-quality brines.
  • To identify and discuss the challenges associated with these extraction methods.
  • To provide perspectives on future lithium extraction technology development.

Main Methods:

  • Precipitation
  • Solvent extraction
  • Sorption
  • Membrane-based separation
  • Electrochemical-based separation

Main Results:

  • Exploration of various separation techniques for lithium recovery.
  • Analysis of technical hurdles including low lithium concentrations and high Mg:Li ratios.
  • Discussion of the potential of diverse low-quality brine sources.

Conclusions:

  • Low-quality brines represent a significant, largely untapped resource for lithium production.
  • Overcoming technical challenges in extraction is key to unlocking this potential.
  • Innovative separation technologies are essential for sustainable lithium sourcing.