Extraction of Zn, Mn and Co from Zn-Mn-Co-Cd-Ni containing solution using D۲EHPA, CYANEX® ۲۷۲ and CYANEX® ۳۰۲
محل انتشار: ماهنامه بین المللی مهندسی، دوره: 24، شماره: 2
سال انتشار: 1390
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 125
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شناسه ملی سند علمی:
JR_IJE-24-2_008
تاریخ نمایه سازی: 17 بهمن 1400
چکیده مقاله:
Effects of pH, D۲EHPA, Cyanex® ۳۰۲ and Cyanex® ۲۷۲ on extractions of zinc, manganese and cobalt from a Zn-Mn-Co-Cd-Ni containing solution was comprehensively investigated at the room temperature. The addition of Cyanex® ۳۰۲ indicated a left-shifting-effect on the extraction curve of zinc, a right-shifting-effect on the extraction curve of manganese and no effect on the extraction of cobalt. The addition of Cyanex® ۲۷۲ shifted all three curves to the right. The most suitable extractant for separation of zinc from manganese was therefore ۰.۳–۰.۳ mixture of D۲EHPA with Cyanex® ۳۰۲ and for separation of manganese from cobalt was sole D۲EHPA. The stoichiometric coefficient for the extraction reaction of zinc (whether using pure D۲EHPA or a mixture made of D۲EHPA with Cyanex® ۲۷۲ or Cyanex® ۳۰۲) was ۳. It varied from ۴ to ۵ for manganese, when the quantity of Cyanex® ۳۰۲ dissolved in D۲EHPA increased from ۰ to ۱۰۰%. Utilizing the above results, a two stage leaching was devised to recover zinc, manganese and cobalt from a complex solution. At the first stage, a ۰.۶M D۲EHPA extractant could recover zinc and a scrubbing reaction with organic:aqueous (O:A) ratio of ۲۰:۱ could wash-out cadmium from the raffinate. In the second stage, the leaching residue was treated with ۰.۶M D۲EHPA for recovery of manganese. This stage was then followed by a one-stage scrubbing of cobalt with O:A ratio of ۲۰:۱.
کلیدواژه ها:
Solvent extraction ، Zn ، Mn ، CO ، Cd ، Ni ، D۲EHPA ، CYANEX® ۲۷۲ ، CYANEX® ۳۰۲ ، Stoichiometric Coefficient ، Organic Aqueous Solution
نویسندگان
Eskandar Keshavarz Alamdari
New Materials, MERC
D. F. Haghshenas
MMPE, Amirkabir University of Technology
D. Darvishi
NM, MERC
S.K. Sadrnezhaad
Materials Science and Engineering, Sharif University of Technology