A Tutorial Mini-review on Crown Ethers Towards Rhodium Separation: Application of Crown Ether Studies

Takashiro Akitsu1,Email

Swapan Sinha2

Subhadeep Midya2, 3

Himadri Sekhar Das2,4

Gourisankar Roymahapatra2,Email

1Department of Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
2School of Applied Science and Humanities, Haldia Institute of Technology, Haldia 721657, West Bengal, India
3Department of Chemical Engineering, Haldia Institute of Technology, Haldia 721657, West Bengal, India
4Department of Electronics and Communication Engineering, Haldia Institute of Technology, Haldia 721657, West Bengal, India

Abstract

Metallic resources are generally obtained as raw materials from mines, and through a refining process, they are made into metallic materials. In recent years, however, the recovery of precious metals from so-called "urban mines," or waste, has become important due to resource quantity and cost issues. Therefore, this paper first attempts to provide an introductory explanation of crown ethers in supramolecular chemistry as a principle for their selectivity for metal ions. Keeping in mind the selective recovery of rhodium, which is industrially important but not in great demand, the role and conditions of "crown ethers" in column separation and solvent extraction are briefly summarized.

A Tutorial Mini-review on Crown Ethers Towards Rhodium Separation: Application of Crown Ether Studies