4.7 Article

Recovery of rare earth elements from deep-sea mud using acid leaching followed by selective solvent extraction with N1923 and TBP

Related references

Note: Only part of the references are listed.
Article Engineering, Chemical

Extraction mechanism of germanium in sulfate solutions using a tertiary amine (N235)-based solvent extraction system

Pengcheng Wang et al.

Summary: With the increasing demand for germanium in high-technology fields, the study investigated the mechanism of Ge(IV) extraction from a sulfuric acid solution using the tertiary amines (N235) and trioctyl phosphate (TOP) system. The extraction process followed an anion exchange mechanism and Ge(IV) was extracted as a Ge(OH)(HL)3 anion complex. Tartaric acid coordinated to Ge(IV) via a C-O bond from the carboxylate group. The extracted complex species were identified as Ge(OH)(HL)(2)L center dot HN(R-1)(3) and Ge(OH)(HL)L-2 center dot[HN(R-1)(3)](2) (R=C8H17).

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

Article Engineering, Chemical

A novel synergistic extraction system for the recovery of scandium (III) from sulfuric acid medium with mixed Cyanex923 and N1923

Mingyang Liu et al.

Summary: This study presents a novel synergistic extraction system for the recovery of scandium, which utilizes a mixture of Cyanex923 and N1923 in sulfuric acid medium. The experimental results demonstrate that the system exhibits remarkable synergistic effects on Sc(III), resulting in enhanced stripping performance and extraction efficiency. Moreover, the system shows high reusability and holds potential industrial application value for the separation and recovery of Sc(III) from nickel laterite ores.

SEPARATION AND PURIFICATION TECHNOLOGY (2022)

Review Chemistry, Physical

Synthesis techniques and applications of rare earth metal oxides semiconductors: A review

Amol S. Patil et al.

Summary: Rare earth elements have gained attention due to their unique properties and diverse applications. Various synthetic methods can be used to prepare rare earth-based nanomaterials. These nanomaterials have wide-ranging applications across multiple fields.

CHEMICAL PHYSICS LETTERS (2022)

Article Engineering, Chemical

Enhanced impurity removal of ionic rare earth leaching solution through the use of lauryl glucoside

Xianping Luo et al.

Summary: This study used Lauryl glucoside (LG) as an impurity removal agent in ionic rare earth leaching solution for the first time. It effectively enhanced the removal of impurity metal ions and avoided the loss of rare earth. Compared to ammonium bicarbonate, LG achieved higher removal rates without causing ammonia nitrogen pollution. LG reacted with impurity metal ions to form a new compound, avoiding the absorption of rare earth ions. The interaction between LG and rare earth increased with pH values, leading to rare earth loss. LG, as a biodegradable surfactant derived from renewable plant materials, has a good prospect for application in impurity removal in rare earth leaching solutions.

MINERALS ENGINEERING (2022)

Article Metallurgy & Metallurgical Engineering

Selective recovery of thorium and uranium from leach solutions of rare earth concentrates in continuous solvent extraction mode with primary amine N1923

Nguyen Trong Hung et al.

Summary: This study systematically investigated a continuous counter-current extraction method for the selective recovery of thorium and uranium from rare earth concentrate leach solutions in Vietnam. Using primary amine N1923 as the extractant, thorium and uranium were efficiently recovered through continuous mixer-settler extraction, scrubbing, and back-extraction steps.

HYDROMETALLURGY (2022)

Article Engineering, Environmental

Closing the upcoming EU gypsum gap with phosphogypsum

Nils Haneklaus et al.

RESOURCES CONSERVATION AND RECYCLING (2022)

Article Engineering, Environmental

Separation of vanadium, tungsten and molybdenum from spent SCR catalysts solution by solvent extraction with primary amine N1923

Haibing Xiao et al.

Summary: An efficient method is proposed to separate vanadium, molybdenum, and tungsten from the leachate of hydrometallurgical treated spent SCR catalysts. This method involves acidified primary amine N1923 extraction and selective stripping using sulfuric acid and ammonia solution.

WASTE MANAGEMENT (2022)

Review Environmental Sciences

Review of the concentration, bioaccumulation, and effects of lanthanides in marine systems

Patricia Neira et al.

Summary: This article reviews the concentrations of lanthanides in marine waters and biota. Lanthanides mainly enter aquatic ecosystems through continental contributions, and the highest concentrations are found near the coast. Heavy REEs tend to remain in solution in seawater, while light REEs are more likely to be assimilated by organisms, potentially affecting biological systems. The bioaccumulation of lanthanides in marine organisms follows a trophic dilution pattern.

FRONTIERS IN MARINE SCIENCE (2022)

Article Metallurgy & Metallurgical Engineering

Recovery of rare earth elements from coal flyash using deep eutectic solvents as leachants and precipitating as oxalate or fluoride

Ram Karan et al.

Summary: This paper presents a study on the applicability of deep eutectic solvents (DES) for the recovery of rare earth elements (REE) from coal flyash. The DES systems showed better leaching performance and higher leach recovery compared to individual hydrogen bond donors and acceptors. The leaching mechanism of REE with DES was proposed.

HYDROMETALLURGY (2022)

Article Geochemistry & Geophysics

Essential processes involving REE-enrichment in biogenic apatite in deep-sea sediment decoded via multivariate statistical analyses

Kazutaka Yasukawa et al.

Summary: This study reveals the key processes controlling the enrichment of rare-earth elements (REE) in biogenic apatite through a novel data-driven approach. It shows that adsorption and substitution mechanisms are responsible for the preferential enrichment of REE in biogenic apatite in REE-rich mud layers, which is possibly influenced by paleoceanographic conditions and the supply of organic matter.

CHEMICAL GEOLOGY (2022)

Article Engineering, Chemical

Extraction and separation of W and rare earth from H2SO4-H3PO4 mixed acid leaching liquor of scheelite by primary amine N1923

Xingyu Chen et al.

Summary: In this study, tungsten and rare earth (La) were efficiently extracted and separated from the H2SO4-H3PO4 mixed acid leaching liquor using N1923 extraction and a two-step stripping process. The optimal conditions for extraction were determined, resulting in high extraction efficiencies. The separation of La from the loaded organic phase using HCl solution and subsequent stripping of W using ammonia solution were also successful.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Article Metallurgy & Metallurgical Engineering

Recovery of gallium from leach solutions of zinc refinery residues by stepwise solvent extraction with N235 and Cyanex 272

Kuifang Zhang et al.

Summary: A novel method was proposed for the extraction of gallium from high-ferric and strongly acidic sulfate leach solutions, achieving efficient separation of metals through multiple stepwise processes. The method demonstrated high selectivity for iron removal and gallium extraction, leading to a concentrated gallium solution with a concentration of 1502 mg/L.

HYDROMETALLURGY (2021)

Article Geology

Geological features and resource potential of deep-sea mud highly enriched in rare-earth elements in the Central Pacific Basin and the Penrhyn Basin

Junichiro Ohta et al.

Summary: Deep-sea mud enriched in rare-earth elements and yttrium (REY-rich mud) has been found with high concentrations attributed to enhanced deposition of fish debris acting as a host. Mineralogical and chemical analyses revealed three layers of REY-rich mud, indicating different formation processes based on the presence/absence of specific minerals. Further investigation suggests that this highly REY-rich mud in the Central Pacific Ocean could potentially provide a significant portion of the global annual mine production of REY and scandium.

ORE GEOLOGY REVIEWS (2021)

Article Engineering, Chemical

Extraction performance and mechanism of TBP in the separation of Fe3+from wet-processing phosphoric acid

Zhijin Hu et al.

Summary: This study systematically investigated the extraction of Fe3+ from phosphoric acid using TBP as extractant, and characterized the extraction phase using FT-IR and UV-vis. DFT simulation was used to analyze the interaction between TBP and HFeCl4, revealing a strong bond formation between Fe and TBP in the extraction process. The results provide insights into the extraction mechanism and complex structure of TBP in extracting Fe3+ from phosphoric acid.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

Review Geochemistry & Geophysics

Ocean-Floor Sediments as a Resource of Rare Earth Elements: An Overview of Recently Studied Sites

Jelena Milinovic et al.

Summary: Rare earth elements are of particular interest due to their applications in modern communications, renewable energy generation, and transport electrification, but their supply security is at risk. Diversification of supply is needed as reliance on one supplier poses a threat. Studies have shown high concentrations of various REEs in ocean-floor sediments, presenting them as potential resources, yet the economic cost and environmental impacts of deep-sea mining need to be considered.

MINERALS (2021)

Review Engineering, Environmental

Rare earth metals from secondary sources: Review of potential supply from waste and byproducts

Gabrielle Gaustad et al.

Summary: This study explores the resource and economic potential for extracting rare earth elements (REEs) from waste and byproduct streams, finding that some secondary sources are richer in high value REEs. By combining materials flow analysis and characterization data, the study provides high-level guidance on the potential contribution of secondary sources.

RESOURCES CONSERVATION AND RECYCLING (2021)

Article Geology

The transfer of rare earth elements during early diagenesis in REY-rich sediments: An example from the Central Indian Ocean Basin

Miao Yu et al.

Summary: Rare earth element and ytterbium-rich deep-sea sediments found in the Central Indian Ocean Basin consist of pelagic clay and phillipsite-bearing pelagic clay, enriched in middle and heavy rare earth elements. These sediments undergo weak early diagenesis after burial, with REY captured by bioapatite from hydrogenetic micronodules.

ORE GEOLOGY REVIEWS (2021)

Article Geochemistry & Geophysics

Clay-mineral distribution in recent deep-sea sediments around Taiwan: Implications for sediment dispersal processes

Kalyani Nayak et al.

Summary: The study on clay-mineralogy of sediments near Taiwan revealed that the majority of sediments are sourced from Taiwan and Luzon, with clay mineral assemblages gradually changing between different provinces. The relative abundances of clay minerals in turbidites and hemipelagites are quite similar in most cores, suggesting they share common detrital clay sources. Smectite is relatively abundant around Taiwan, brought in by the Kuroshio Current, while illite and chlorite dominate in river-related canyon systems, indicating dilution of smectite by river-fed flows. Flood-induced turbidity currents are important for transporting Taiwan-derived sediments into neighboring deep-sea basins.

TECTONOPHYSICS (2021)

Article Metallurgy & Metallurgical Engineering

Removal of Fe(III) from Ni-Co-Fe chloride solutions using solvent extraction with TBP

Xintao Yi et al.

HYDROMETALLURGY (2020)

Article Chemistry, Physical

Strong anion-anion hydrogen bond in the ionic liquid 1-ethyl-3-methylimidazolium hydrogen sulfate

Mauro C. C. Ribeiro

JOURNAL OF MOLECULAR LIQUIDS (2020)

Article Engineering, Chemical

Integrated acid leaching and biological sulfate reduction of phosphogypsum for REE recovery

Marja Salo et al.

MINERALS ENGINEERING (2020)

Article Multidisciplinary Sciences

The tremendous potential of deep-sea mud as a source of rare-earth elements

Yutaro Takaya et al.

SCIENTIFIC REPORTS (2018)

Article Multidisciplinary Sciences

In-situ measurements of rare earth elements in deep sea sediments using nuclear methods

Jasmina Obhodas et al.

SCIENTIFIC REPORTS (2018)

Article Metallurgy & Metallurgical Engineering

Dissolution behaviors of rare earth elements in phosphoric acid solutions

Sheng-xi Wu et al.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2018)

Article Metallurgy & Metallurgical Engineering

Process optimization and kinetics for leaching of cerium, lanthanum and neodymium elements from iron ore waste's apatite by nitric acid

A. Ferdowsi et al.

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA (2017)

Article Metallurgy & Metallurgical Engineering

Process investigation of the acid leaching of rare earth elements from phosphogypsum using HCl, HNO3, and H2SO4

Mugdha Walawalkar et al.

HYDROMETALLURGY (2016)

Article Geosciences, Multidisciplinary

Geochemistry and mineralogy of REY-rich mud in the eastern Indian Ocean

Kazutaka Yasukawa et al.

JOURNAL OF ASIAN EARTH SCIENCES (2014)

Article Geosciences, Multidisciplinary

Deep-sea mud in the Pacific Ocean as a potential resource for rare-earth elements

Yasuhiro Kato et al.

NATURE GEOSCIENCE (2011)

Article Metallurgy & Metallurgical Engineering

A comparative study on extraction of Fe(III) from chloride leach liquor using TBP, Cyanex 921 and Cyanex 923

R. K. Mishra et al.

HYDROMETALLURGY (2010)