Results 21 to 30 of about 13,195 (290)

Scandium-Catalyzed Phenol-Directed Construction of 5Carbonyl-4-hydroxybenzofurans via Intramolecular FriedelCrafts Reaction

open access: yes, 2023
Herein we report a scandium-catalyzed regioselective synthesis of 5-carbonyl-4-hydroxybenzofurans via a phenol-directed intramolecular Friedel–Crafts reaction. This synthetic method was applied for the total synthesis of furanoflavones.
Tetsuhiro Nemoto   +9 more
core   +1 more source

The justification of scandium selection for microalloying and modifying of high-strength aluminium alloys

open access: yesАвіаційно-космічна техніка та технологія, 2022
The substantiation of the scandium selection for microalloying and modifying of high-strength aluminum alloys. The research material is a high-strength aluminum alloy B96C1 of the Al-Zn-Mg-Cu system.
Natalіja Kalіnіna   +5 more
doaj   +1 more source

Scandium-Catalyzed Electrochemical Synthesis of α‑Pyridinyl Tertiary Amino Acids and Esters

open access: yes, 2023
α-Pyridyl tertiary amino acids have potential pharmaceutical applications because of their structural features. However, their synthesis is still highly limited. Herein, we report a straightforward approach for the electrochemical synthesis of tertiary α-
Jiacong Lin (17138501)   +3 more
core   +1 more source

Extraction of scandium from bauxite residue by high-pressure leaching in sulfuric acid solution

open access: yesHeliyon, 2023
Rare earth elements, such as yttrium, scandium, neodymium, and praseodymium, have been reported to be associated with minerals in bauxite and transferred to the refining residue when bauxite is refined to alumina (Al2O3) by Bayer Process.
M.R. Kanekaputra, M.Z. Mubarok
doaj   +1 more source

Study on the mechanism and kinetics of sulfuric acid leaching scandium from rich scandium anatase [PDF]

open access: yes, 2022
Scandium and its compounds have excellent properties, and are widely used in cutting-edge fields such as optics, electronics, and alloys. Thus, scandium is an important strategic metal.
Gao, Likun   +6 more
core   +1 more source

FLUORESCENCE ENHANCEMENT OF SCANDIUM COMPOUNDS WITH 2-NAPHTHOYLTRIFLUOROACETONE IN WATER SOLUTION [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2019
The fluorescence effect of the scandium compounds with 2-naphthoyltrifluoroacetone on solvent composition was studied. The earlier unknown increase in fluorescence quantum yield of scandium diketonate was observed under the change of solvent from ...
L. Y. Mironov
doaj   +1 more source

Scandium-Promoted Direct Conversion of Dinitrogen into Hydrazine Derivatives via N–C Bond Formation

open access: yes, 2019
Direct conversion of dinitrogen (N2) into organic compounds, not through ammonia (NH3), is of great significance both fundamentally and practically. Here we report a highly efficient scandium-mediated synthetic cycle affording hydrazine derivatives (RMeN–
Zhenfeng Xi (1438816)   +3 more
core   +2 more sources

Research Progress on Recovery of Scandium from Vanadium Titano- Magnetite in Panzhihua

open access: yesKuangchan zonghe liyong, 2022
Review on the occurrence state of scandium in Panzhihua vanadium titano- magnetite showed as Mg-Fe isomorphism, rich reserves and the recovery of considerable potential value.
Lufeng Wang, Yue'e Yan
doaj   +1 more source

Solvent Extraction of Sc(III) by D2EHPA/TBP from the Leaching Solution of Vanadium Slag

open access: yesMetals, 2020
The solvent extraction of scandium by the mixture of di-(2-ethylhexyl) phosphate (D2EHPA) and tri-n-butyl phosphate (TBP) has been investigated in the acidic leaching solution of vanadium slag.
Xuejiao Cao   +3 more
doaj   +1 more source

Recovery of Scandium from Sulfuric Acid Aqueous Solutions using Ion-Exchange Resin

open access: yesJournal of MMIJ, 2022
Ion-exchange process with chelating resins was investigated for recovery scandium from sulfuric acid aqueous solutions. An iminodiacetic acid type chelating resin, Diaion CR11, had a higher Sc adsorption selectivity than other elements.
Hiroto WATANABE   +3 more
doaj   +1 more source

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