# Uranium in-situ leaching liquors are a potential source of “magnetic” REE

https://mdr.nims.go.jp/datasets/d63877bd-f6d9-4be8-a8bc-bedc1c8829fb

## File

- [REPM2025_P2-23_Kirillov.pdf](https://mdr.nims.go.jp/filesets/ce57f247-6a38-4f18-9e57-96b648fc5b5f/download) ([Detail](https://mdr.nims.go.jp/filesets/ce57f247-6a38-4f18-9e57-96b648fc5b5f.md))

## Id

d63877bd-f6d9-4be8-a8bc-bedc1c8829fb

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-08-13T08:44:59.486693Z

## Updated at

2025-08-20T03:31:03.220171Z

## Published at

2025-08-20T03:19:30.375368Z

## Doi

https://doi.org/10.48505/nims.5647

## First published url



## Date published



## Recorded date published



## Resource type

conference_poster

## Manuscript type

na

## Collection

- id: d28f086a-61aa-4bc7-bcae-5a1078cbc6c7
  identifier: https://mdr.nims.go.jp/pid/d28f086a-61aa-4bc7-bcae-5a1078cbc6c7
  title: The 28th International Workshop on Rare Earth and Future Permanent Magnets
    and Their Applications (REPM2025)

## Title

- title: Uranium in-situ leaching liquors are a potential source of “magnetic” REE
  title_type: original
  lang: en

## Description

- description: The main reasons for the structural imbalance are the limited and localized
    deposits of yttrium group REE in China and, in this regard, the global increase
    in the processing volumes of bastnaesite, loparite, monazite, which results in
    the overproduction of light REE. The transition to the use of raw REE sources
    that best satisfy the current and planned market demands in terms of composition
    is the most justified solution to the problem of the structural imbalance of REE
    production both in the world and in Russia.One of the rich Russian sources of
    REE containing the above elements (the content of the medium-heavy REE group is
    up to 30%) are uranium in-situ leaching (IL) liquors. The advantage of these objects
    is that the REE in them are already in the extracted state.UrFU has developed
    a pilot plant for the extraction of REE from uranium IL liquors. During the operation
    of the plant, it was possible to obtain REE concentrates in a stable mode with
    a purity of at least 99%. In this case, the content of the medium-heavy REE group
    in the final concentrate decreases to 15-20% due to the use of cation exchange
    resin for primary concentration, which mainly extracts the light REE group. Studies
    were also conducted on concentrating the medium-heavy REE group from uranium IL
    liquors using impregnated sorbents containing monosubstituted diglycolamides as
    an active phase. When passing 100 specific volumes of uranium PV solution through
    a column, the degree of extraction of heavy REE (Ho-Lu fraction) was more than
    90%. The use of this sorbent allows selective extraction of REE from highly mineralized
    liquors containing significant amounts of iron and aluminum ions. Based on the
    analysis of the output curves of REE sorption from uranium IL liquors, the degree
    of concentration of the medium-heavy group can be estimated at 150-300 times.
    Subsequent washing of the rich column with sulfuric acid liquors of different
    concentrations made it possible to obtain Pr-Nd, Sm-Eu-Gd, Y-Tb-Dy, Ho-Lu concentrates
    directly at the extraction site. The joint sequential use of sorption units containing
    cation exchange resin and a sorbent with active acidic diglycolamide will allow
    the enterprise to respond flexibly to the demand for REE.
  description_type: abstract
  lang: en

## Creator

- name: Evgenii Kirillov
  role: author
  organization: UrFU, Russia
- name: Vladimir Rychkov
  role: author
  organization: UrFU, Russia

## Contact agent



## Publisher

organization: National Institute for Materials Science (NIMS)

## Managing organization



## Keyword

- subject: REPM2025
  schema: not_defined
- subject: diglycolamide
  schema: not_defined
- subject: in-situ leaching
  schema: not_defined
- subject: Uranium
  schema: not_defined
- subject: rare earth elements
  schema: not_defined
- subject: ion exchange
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

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## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: REPM2025
start_date: 2025-07-27
end_date: 2025-07-31
identifier: https://www.nims.go.jp/mmu/repm2025/

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## Fileset

- id: ce57f247-6a38-4f18-9e57-96b648fc5b5f
  filename: REPM2025_P2-23_Kirillov.pdf
  content_type: application/pdf
  size: 464198
  md5: 6449420c557588a6493aca42b6460070

## Thumbnail

fileset_id: ce57f247-6a38-4f18-9e57-96b648fc5b5f
filename: REPM2025_P2-23_Kirillov.pdf