Provided is a recovery method of useful resources in seawater and brine, and more particularly, a recovery method of useful resources in seawater and brine capable of improving adsorption efficiency and recovery efficiency of trace amounts of useful resources such as strontium, lithium, boron, or the like, present in brine at low cost by using a magnetic adsorbent composite and a solid-liquid separation process which uses magnetic force.

Provided is a recovery method of useful resources in seawater and brine, and more particularly, a recovery method of useful resources in seawater and brine capable of improving adsorption efficiency and recovery efficiency of trace amounts of useful resources such as strontium, lithium, boron, or the like, present in brine at low cost by using a magnetic adsorbent composite and a solid-liquid separation process which uses magnetic force.

Systems and methods for separating Y and Sr are provided. The systems and methods provide combinations of solutions, vessels, and/or media that can provide Y solutions of industrially beneficial concentration.

Systems and methods for separating Y and Sr are provided. The systems and methods provide combinations of solutions, vessels, and/or media that can provide Y solutions of industrially beneficial concentration.

Disclosed herein are aspects of a method for removing one or more gangue compounds from lithium-containing material by producing and further treating a pre-treated feedstock obtained from the lithium-containing material. In certain aspects, the method can produce a calcium material-concentrated layer and a lithium-material concentrated layer and the ability to separate the two. Also, disclosed herein is a system for removing one or more gangue compounds from lithium-containing material, the system comprising a separating apparatus and a means for separating one or more gangue compounds from one or more lithium compounds. In aspects disclosed herein, separation can be based on a difference of a specific gravity of the one or more calcium compounds and a specific gravity of the one or more lithium compounds.

Disclosed herein are aspects of a method for removing one or more gangue compounds from lithium-containing material by producing and further treating a pre-treated feedstock obtained from the lithium-containing material. In certain aspects, the method can produce a calcium material-concentrated layer and a lithium-material concentrated layer and the ability to separate the two. Also, disclosed herein is a system for removing one or more gangue compounds from lithium-containing material, the system comprising a separating apparatus and a means for separating one or more gangue compounds from one or more lithium compounds. In aspects disclosed herein, separation can be based on a difference of a specific gravity of the one or more calcium compounds and a specific gravity of the one or more lithium compounds.

A method for removing calcium in a lithium battery recycling process includes recovering acidic lithium liquid including calcium; adding an oxalate aqueous solution to the acidic lithium liquid as a first calcium removal process; raising the pH of the acidic lithium liquid to prepare an alkaline lithium liquid; and adding ammonium oxalate to the alkaline lithium liquid as a second calcium removal process.

A method for removing calcium in a lithium battery recycling process includes recovering acidic lithium liquid including calcium; adding an oxalate aqueous solution to the acidic lithium liquid as a first calcium removal process; raising the pH of the acidic lithium liquid to prepare an alkaline lithium liquid; and adding ammonium oxalate to the alkaline lithium liquid as a second calcium removal process.

Disclosed herein are acid-base leaching methods and systems. Specifically, the systems and methods can include supplying an iron and/or aluminum feed material and an acid to a first reaction chamber; supplying a first leachate comprising iron and/or aluminum salts or cations from the first reaction chamber and a calcium feed material to a second reaction chamber to form a solid comprising iron and/or aluminum; supplying a second leachate from the second reaction chamber comprising alkaline earth metal salts or cations and a base to a third reaction chamber to form a precipitated alkaline earth metal product.

Disclosed herein are acid-base leaching methods and systems. Specifically, the systems and methods can include supplying an iron and/or aluminum feed material and an acid to a first reaction chamber; supplying a first leachate comprising iron and/or aluminum salts or cations from the first reaction chamber and a calcium feed material to a second reaction chamber to form a solid comprising iron and/or aluminum; supplying a second leachate from the second reaction chamber comprising alkaline earth metal salts or cations and a base to a third reaction chamber to form a precipitated alkaline earth metal product.