Recycling of zinc oxide dust using ChCl-urea deep eutectic solvent with nitrilotriacetic acid as complexing agents

2022 ◽  
Vol 175 ◽  
pp. 107295
Author(s):  
Shuxian Wang ◽  
Cunying Xu ◽  
Zhen Lei ◽  
Jianru Li ◽  
Jingling Lu ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Deep Eutectic Solvent ◽  
Nitrilotriacetic Acid ◽  
Complexing Agents

Leaching of low grade zinc oxide ores in NH4Cl–NH3 solutions with nitrilotriacetic acid as complexing agents

2015 ◽  
Vol 158 ◽  
pp. 101-106 ◽  
Author(s):  
Shuai Rao ◽  
Tianzu Yang ◽  
Duchao Zhang ◽  
WeiFeng Liu ◽  
Lin Chen ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Nitrilotriacetic Acid ◽  
Complexing Agents ◽  
Low Grade

scholarly journals Friedel-Crafts benzoylation reaction of aromatic compounds using zinc oxide nanoparticles in deep eutectic solvent (choline chloride/urea) under microwave irradiation

2019 ◽  
Vol 2 (2) ◽  
pp. 62-70
Author(s):  
Hai Truong Nguyen ◽  
Dung Thi Kim Ngo ◽  
Thinh Nguyen Huu Pham ◽  
Phuong Hoang Tran
Keyword(s):  
Zinc Oxide ◽  
Microwave Irradiation ◽  
Aromatic Compounds ◽  
Zinc Oxide Nanoparticles ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Reaction Times ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
High Yields

Synthesis of zinc oxide nanoparticles (ZnO) which was found to be effective catalyst for Friedel-Crafts benzoylation reaction in the presence of deep eutectic solvent (DES). The method is one of the most important intermediates for preparing fine chemicals in the field of pharmaceuticals, which is a tool for organic syntheses of aromatic ketones. ZnO precursor was prepared from Zn(CH3COO)2.2H2O and H2C2O4.2H2O, ZnO nanoparticles were characterized by using X-ray Powder Diffraction (XRD), Scanning Electron Microscope (SEM). The benzoylation of aromatic compounds and benzoyl chloride using nanoparticles ZnO/ [CholineCl][Urea]2, under microwave irradiation afforded the desired products in high yields and short reaction times. The catalyst/solvent could be recycled several times without loss of efficient catalytic activity.

THE SEPARATION OF THE RARE EARTHS BY ION-EXCHANGE PROCEDURES

1951 ◽  
Vol 29 (5) ◽  
pp. 363-371 ◽  
Author(s):  
F. T. Fitch ◽  
D. S. Russell
Keyword(s):  
Rare Earth ◽  
Rare Earths ◽  
Nitrilotriacetic Acid ◽  
Ammonium Salts ◽  
Complexing Agents ◽  
Complex Ions ◽  
Form Complex ◽  
Cation Exchange Resins ◽  
Exchange Resins ◽  
Cerium Group

The iminodiacetic acids have been examined as possible complexing agents in the chromatographic separation of the rare earths with cation exchange resins. The ammonium salts of these acids form complex ions involving both one and two iminodiacetate ions of increasing stability with the rare earth elements of greater atomic number. Methods greatly reducing the time and material requirements are presented for the separation of the cerium group elements with nitrilotriacetic acid.

Comparison of chelating ion exchange resins in sorption of copper(II) and zinc(II) complexes with ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA)

2008 ◽  
Vol 86 (10) ◽  
pp. 958-969 ◽  
Author(s):  
Dorota Kołodyńska ◽  
Zbigniew Hubicki
Keyword(s):  
Heavy Metal ◽  
Functional Groups ◽  
Heavy Metal Ions ◽  
Ethylenediaminetetraacetic Acid ◽  
Ph Value ◽  
Nitrilotriacetic Acid ◽  
Complexing Agents ◽  
Ion Exchange Resins ◽  
Ion Exchangers ◽  
Exchange Resins

This paper investigates the macroporous chelating ion exchangers with different functional groups for their sorption properties towards the copper(II) and zinc(II) ions. The investigations by the dynamic and static methods were carried out in the presence of traditional complexing agents. The differences in affinity of Cu(II) and Zn(II) complexes with these complexones result from the kind of functional groups of the chelating ion exchangers, such as thiourea, aminomethylphosphonate, iminodiacetate, and polyamine groups as well as from the pH value. The quantitative removal of studied heavy metal complexes using chelating ion exchangers is achieved in the case when resins compete successfully for the heavy metal ions against these chelators.Key words: chelating resins, heavy metals, EDTA, NTA.

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