کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
627758 1455466 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Separation of cobalt and nickel from acidic leach solutions by emulsion liquid membranes using Alamine 300 (TOA) as a mobile carrier
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Separation of cobalt and nickel from acidic leach solutions by emulsion liquid membranes using Alamine 300 (TOA) as a mobile carrier
چکیده انگلیسی

An emulsion liquid membrane process using tri-n-octylamine (Alamine 300) to extract and separate cobalt from the acidic leach solutions has been presented. Liquid membrane consists of a diluent, a surfactant (ECA 4360J), and an extractant (Alamine 300, Cognis Corp.). Ammonia solutions have been used as the stripping solution. The important parameters governing the permeation of cobalt and their effect on the separation process have been studied. These parameters are membrane type and composition, stirring speed, feed phase pH, surfactant concentration, extractant concentration, stripping phase concentration, phase ratio, and treatment ratio. The optimum conditions have been determined. It is possible to selectively extract 99% of cobalt from the acidic cobalt–nickel leach solutions at the optimum conditions. The separation factors of cobalt with respect to nickel, based on initial feed concentration, have experimentally found to be of as high as 108 for about equimolar Co–Ni feed solutions. However, non-equimolar feed mixtures, Ni in excess, separation factor for cobalt decreases as the nickel concentration in the feed phase increases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Desalination - Volume 224, Issues 1–3, 15 April 2008, Pages 201-208