抄録
The objective of this study is to evaluate the effect of acids on light rare earth elements dissolution from weathered residual rare earth ore after mechanochemical reaction by grinding. In the case of sulfuric acid leaching, the maximum of light rare earth elements dissolution was obtained when the initial sulfuric acid concentration was 5.0 mol/dm3 and leaching time was 24 hours. Thus, we performed sulfuric, hydrochloric and nitric acid leaching experiments at the same condition. The obtained results highlighted that the best light rare earth elements dissolution among these acids achieved by hydrochloric acid leaching. On the other hand, equivalent light rare earth elements dissolution except cerium was achieved by nitric acid leaching. From x-ray absorption fine structure analysis, it was revealed that cerium oxide(IV) (CeO2) was produced after nitric acid leaching because of redox reaction between cerium and nitrate ion.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 174-180 |
| ページ数 | 7 |
| ジャーナル | Journal of the Society of Powder Technology, Japan |
| 巻 | 56 |
| 発行部数 | 4 |
| DOI | |
| 出版物ステータス | Published - 2019 4 10 |
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ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
- Fluid Flow and Transfer Processes
- Filtration and Separation
これを引用
Evaluation of acids onto the light rare earth elements dissolution from weathered residual rare earth ore activated by mechanochemical treatment by grinding. / Kato, Tatsuya; Granata, Giuseppe; Tokoro, Chiharu.
：: Journal of the Society of Powder Technology, Japan, 巻 56, 番号 4, 10.04.2019, p. 174-180.研究成果: Article
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TY - JOUR
T1 - Evaluation of acids onto the light rare earth elements dissolution from weathered residual rare earth ore activated by mechanochemical treatment by grinding
AU - Kato, Tatsuya
AU - Granata, Giuseppe
AU - Tokoro, Chiharu
PY - 2019/4/10
Y1 - 2019/4/10
N2 - The objective of this study is to evaluate the effect of acids on light rare earth elements dissolution from weathered residual rare earth ore after mechanochemical reaction by grinding. In the case of sulfuric acid leaching, the maximum of light rare earth elements dissolution was obtained when the initial sulfuric acid concentration was 5.0 mol/dm3 and leaching time was 24 hours. Thus, we performed sulfuric, hydrochloric and nitric acid leaching experiments at the same condition. The obtained results highlighted that the best light rare earth elements dissolution among these acids achieved by hydrochloric acid leaching. On the other hand, equivalent light rare earth elements dissolution except cerium was achieved by nitric acid leaching. From x-ray absorption fine structure analysis, it was revealed that cerium oxide(IV) (CeO2) was produced after nitric acid leaching because of redox reaction between cerium and nitrate ion.
AB - The objective of this study is to evaluate the effect of acids on light rare earth elements dissolution from weathered residual rare earth ore after mechanochemical reaction by grinding. In the case of sulfuric acid leaching, the maximum of light rare earth elements dissolution was obtained when the initial sulfuric acid concentration was 5.0 mol/dm3 and leaching time was 24 hours. Thus, we performed sulfuric, hydrochloric and nitric acid leaching experiments at the same condition. The obtained results highlighted that the best light rare earth elements dissolution among these acids achieved by hydrochloric acid leaching. On the other hand, equivalent light rare earth elements dissolution except cerium was achieved by nitric acid leaching. From x-ray absorption fine structure analysis, it was revealed that cerium oxide(IV) (CeO2) was produced after nitric acid leaching because of redox reaction between cerium and nitrate ion.
KW - Acids
KW - Leaching
KW - Light rare earth elements
KW - Weathered residual rare earth ore
KW - X-ray absorption fine
UR - http://www.scopus.com/inward/record.url?scp=85067609106&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85067609106&partnerID=8YFLogxK
U2 - 10.4164/sptj.56.174
DO - 10.4164/sptj.56.174
M3 - Article
AN - SCOPUS:85067609106
VL - 56
SP - 174
EP - 180
JO - Journal of the Society of Powder Technology, Japan
JF - Journal of the Society of Powder Technology, Japan
SN - 0386-6157
IS - 4
ER -