Extracting Transition Metals from HCl Solutions by Means of Polypropylene Glycol 425

A solution is proposed for processing printed circuit boards that contain a wide range of non-ferrous and precious metals. Ni(II), Zn(II), Al(III), and Fe(III) ions are extracted from acidic mixed solutions in a system based on polypropylene glycol 425 and sodium chloride. A basic technological sche...

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Bibliographic Details
Published in:Russian Journal of Physical Chemistry A 2022-08, Vol.96 (8), p.1693-1697
Main Authors: Fedorova, M. I., Levina, A. V., Zakhodyaeva, Yu. A., Voshkin, A. A.
Format: Article
Language:English
Subjects:
Acid leaching
Aluminum
Chemistry
Chemistry and Materials Science
Circuit boards
Hydroxides
Iron
Nickel
Nonferrous metals
Physical Chemistry
Physical Chemistry of Solutions
Polypropylene glycol
Printed circuits
Sodium chloride
Transition metals
Zinc
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Summary:A solution is proposed for processing printed circuit boards that contain a wide range of non-ferrous and precious metals. Ni(II), Zn(II), Al(III), and Fe(III) ions are extracted from acidic mixed solutions in a system based on polypropylene glycol 425 and sodium chloride. A basic technological scheme for processing of used printed circuit boards is developed, based on the composition of printed circuit boards and experimental data on extraction of non-ferrous metals ions from mixed solutions with different contents of sodium chloride in the system. The proposed technological scheme includes stepwise acid leaching of metals; extraction in an environmentally friendly system based on polypropylene glycol 425 and sodium chloride; and the precipitation of metal hydroxides, which allows complex processing of printed circuit boards metal fraction.
ISSN:0036-0244
1531-863X
DOI:10.1134/S0036024422080106