Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters

Abstract The hydrometallurgical method was used to platinum and palladium leaching with aqua regia solution (3HCl: HNO3). The leaching experiments were designed to obtain the optimum conditions by using Taguchi method with 16 experiments at three different factors (time, temperature and...

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Autores principales:	Mohammed Qasim Hammadi, Rabiha Saleh Yassen, Kadhim Noori Abid
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2017
Materias:	Aqua regia, catalytic converter, PGMs, Platinum, Palladium, recovery, catalytic converter, 3HCl:HNO3. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/5bb86436f6ea4f93a6d3e18376b509b9
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spelling	oai:doaj.org-article:5bb86436f6ea4f93a6d3e18376b509b92021-12-02T08:07:50ZRecovery of Platinum and Palladium from Scrap Automotive Catalytic Converters10.22153/kej.2017.04.0021818-11712312-0789https://doaj.org/article/5bb86436f6ea4f93a6d3e18376b509b92017-09-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/369https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 Abstract The hydrometallurgical method was used to platinum and palladium leaching with aqua regia solution (3HCl: HNO3). The leaching experiments were designed to obtain the optimum conditions by using Taguchi method with 16 experiments at three different factors (time, temperature and solid to liquid ratio), and each factor has four different levels. In this study, leaching the powder sample of catalytic converter that contains platinum and palladium was conducted on the basis of the formation of chloro complexes platinum and palladium (PtCl62-, PdCl42-) with different concentrations in the acidic solution. The optimum conditions for leaching process are (time = 120 minutes, temperature = 100°C, and solid to liquid ratio = 1/20).The best efficiency for platinum and palladium leaching at these conditions were 97.58%, 93.23%, respectively. After leaching process at optimum conditions, platinum was firstly precipitated in the form of (NH4)2PtCl6 (ammonium chloroplatinate) by adding (5ml/l) of ammonium chloride (NH4Cl) as a precipitant agent .Then, palladium was precipitated in the form of (NH4)2PdClO3 (palladium ammonium chlorate) by adding (5g/l) of sodium chlorate (NaClO3) as a precipitant agent to the remaining solution after the removal of platinum. The best efficiency for platinum and palladium recovery at optimum leaching conditions were 91.94%, and 98.82%, respectively. Keywords: Aqua regia, catalytic converter, PGMs, Platinum, Palladium, recovery, catalytic converter, 3HCl:HNO3. Mohammed Qasim HammadiRabiha Saleh YassenKadhim Noori AbidAl-Khwarizmi College of Engineering – University of BaghdadarticleAqua regia, catalytic converter, PGMs, Platinum, Palladium, recovery, catalytic converter, 3HCl:HNO3.Chemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 13, Iss 3 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aqua regia, catalytic converter, PGMs, Platinum, Palladium, recovery, catalytic converter, 3HCl:HNO3. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Aqua regia, catalytic converter, PGMs, Platinum, Palladium, recovery, catalytic converter, 3HCl:HNO3. Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Mohammed Qasim Hammadi Rabiha Saleh Yassen Kadhim Noori Abid Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters
description	Abstract The hydrometallurgical method was used to platinum and palladium leaching with aqua regia solution (3HCl: HNO3). The leaching experiments were designed to obtain the optimum conditions by using Taguchi method with 16 experiments at three different factors (time, temperature and solid to liquid ratio), and each factor has four different levels. In this study, leaching the powder sample of catalytic converter that contains platinum and palladium was conducted on the basis of the formation of chloro complexes platinum and palladium (PtCl62-, PdCl42-) with different concentrations in the acidic solution. The optimum conditions for leaching process are (time = 120 minutes, temperature = 100°C, and solid to liquid ratio = 1/20).The best efficiency for platinum and palladium leaching at these conditions were 97.58%, 93.23%, respectively. After leaching process at optimum conditions, platinum was firstly precipitated in the form of (NH4)2PtCl6 (ammonium chloroplatinate) by adding (5ml/l) of ammonium chloride (NH4Cl) as a precipitant agent .Then, palladium was precipitated in the form of (NH4)2PdClO3 (palladium ammonium chlorate) by adding (5g/l) of sodium chlorate (NaClO3) as a precipitant agent to the remaining solution after the removal of platinum. The best efficiency for platinum and palladium recovery at optimum leaching conditions were 91.94%, and 98.82%, respectively. Keywords: Aqua regia, catalytic converter, PGMs, Platinum, Palladium, recovery, catalytic converter, 3HCl:HNO3.
format	article
author	Mohammed Qasim Hammadi Rabiha Saleh Yassen Kadhim Noori Abid
author_facet	Mohammed Qasim Hammadi Rabiha Saleh Yassen Kadhim Noori Abid
author_sort	Mohammed Qasim Hammadi
title	Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters
title_short	Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters
title_full	Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters
title_fullStr	Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters
title_full_unstemmed	Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters
title_sort	recovery of platinum and palladium from scrap automotive catalytic converters
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2017
url	https://doaj.org/article/5bb86436f6ea4f93a6d3e18376b509b9
work_keys_str_mv	AT mohammedqasimhammadi recoveryofplatinumandpalladiumfromscrapautomotivecatalyticconverters AT rabihasalehyassen recoveryofplatinumandpalladiumfromscrapautomotivecatalyticconverters AT kadhimnooriabid recoveryofplatinumandpalladiumfromscrapautomotivecatalyticconverters
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Recovery of Platinum and Palladium from Scrap Automotive Catalytic Converters

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