Recovery of Platinum from Spent Reforming Catalyst by Acid Leaching and Coprecipitation
作者： C. Masuda , K. Yonezu , K. Watanabe , T. Yokoyama
DOI: 10.1016/J.PROEPS.2013.01.057
关键词: Inorganic chemistry 、 Coke 、 Oxalic acid 、 Catalysis 、 Coprecipitation 、 Hydroxide 、 Dissolution 、 Chemistry 、 Platinum 、 Extraction (chemistry) 、 General Earth and Planetary Sciences
摘要: Abstract Platinum content in a spent reforming catalyst were extracted by oxalic acid at temperatureup to 80°C.Pt extraction was increased increasing the reaction time. The presence of coke covering did not effect on catalyst. According previous study, after dissolution with acid, platinum leachate exist as ionic form such [PtCl6] 4- and [PtCl 4 ] 2 .Fe(II) solution added containing Pt be molar ratio 1/10 [Pt(IV)/Fe(II)] .The adjusted pH 6 NaOH precipitate iron hydroxide.Only about 20% coprecipitated Fe(II) hydroxide 30 min.These are different from result model experiment, we discussed problem toward practical recovery
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