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The Separation Of Tungsten And Molybdenum By The Formation Of Sulphide Complexes And Extraction Into A Weak Base Resin
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Book Synopsis The Separation of Tungsten and Molybdenum by the Formation of Sulphide Complexes and Extraction Into a Weak-base Resin by : Christopher Andrew Fleming
Download or read book The Separation of Tungsten and Molybdenum by the Formation of Sulphide Complexes and Extraction Into a Weak-base Resin written by Christopher Andrew Fleming and published by . This book was released on 1985 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Separation of Tungsten and Molybdenum by the Formation of Sulphide Complexes and Extraction Into a Weak-base Resin by :
Download or read book The Separation of Tungsten and Molybdenum by the Formation of Sulphide Complexes and Extraction Into a Weak-base Resin written by and published by . This book was released on 1985 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The separation of molybdenum from tungsten can be achieved if a solution containing molybdate and tungstate ions is reacted with sulphide ions, and the molybdenum sulphide is extracted with an anion-exchange resin. The separation between molybdenum and tungsten is influenced by factors such as the pH value of the solution, the concentration of sulphide and resin in the solution, and the period of contact between the resin and the metal ions in solution. A fundamental study of the interaction between sulphide ions and molybdate or tungstate ions confirmed a mechanism proposed recently in the literature: MeO4 + nHS + nH+ = MeO4-nSn + nH2O where Me=molybdenum or tungsten and n=1, 2, 3 or 4. In these reaction sequences, each successive step in the reaction (sulphur being substituted for oxygen) is slower than the preceding one, and the molybdate reactions with sulphide are several orders of magnitude faster than the analogous tungsten reactions. As a result, the extent of the complexing of tungsten with sulphide is minimal compared with that of molybdenum in the time span of the extraction experiments. However, the current investigation shows that this is not the cause of selectivity of anion-exchange resins for molybdenum in this system, and that the separation factor between molybdenum and tungsten is much the same for the precursor tungstate anion as it is for the various tungsten sulphide anions. The selectivity of the resin for molybdenum apparently originates from a thermodynamic preference of the amine functional group on the resin for molybdenum sulphide anions over tungstate or tungsten sulphide anions. It is shown that, under optimum conditions, a separation factor of about 30 between molybdenum and tungsten can be achieved in this system.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of the South African Institute of Mining and Metallurgy by : South African Institute of Mining and Metallurgy
Download or read book Journal of the South African Institute of Mining and Metallurgy written by South African Institute of Mining and Metallurgy and published by . This book was released on 1986 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1986 with total page 1352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Unrestricted Mintek Publications by :
Download or read book Unrestricted Mintek Publications written by and published by . This book was released on 1966 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1986 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government reports annual index by :
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1986 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1996 with total page 1628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Separation of Tungsten from Molybdenum ... by : Edward Ellsworth Marbaker
Download or read book The Separation of Tungsten from Molybdenum ... written by Edward Ellsworth Marbaker and published by . This book was released on 1914 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analytical Chemistry of Molybdenum and Tungsten by : W. T. Elwell
Download or read book Analytical Chemistry of Molybdenum and Tungsten written by W. T. Elwell and published by Elsevier. This book was released on 2013-10-22 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Series of Monographs in Analytical Chemistry, Volume 47: Analytical Chemistry of Molybdenum and Tungsten describes the chemical and instrumental methods of analysis of molybdenum and tungsten. This book is composed of 15 chapters that particularly consider detailed methods for determining these metals in typical samples and their alloys by both classical and modern techniques. The opening chapters discuss the history, occurrence, physico-chemical properties, and applications of molybdenum and tungsten. The succeeding chapters deal with the metals’ sampling, decomposition, separation, and qualitative detection. Considerable chapters are devoted to various chemical and instrumental methods for their analysis, including gravimetry, titrimetry, colorimetry, polarography, amperometry, coulometry, emission and atomic absorption spectroscopy, X-ray spectrophotometry, mass spectrometry, and radiochemical methods. The concluding chapter examines the determination of impurities and alloying elements. This book will prove useful to analytical and inorganic chemists, as well as analytical and inorganic chemistry students.
Book Synopsis Extraction of Tungsten from Ore Concentrates by Chlorination by : Arthur W. Henderson
Download or read book Extraction of Tungsten from Ore Concentrates by Chlorination written by Arthur W. Henderson and published by . This book was released on 1965 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2001 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Determination of Molybdenum and Tungsten in Resin by X-ray-fluorescence Spectrometry by : Basil Trewinnard Eddy
Download or read book The Determination of Molybdenum and Tungsten in Resin by X-ray-fluorescence Spectrometry written by Basil Trewinnard Eddy and published by . This book was released on 1985 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis South African national bibliography by : State Library (South Africa)
Download or read book South African national bibliography written by State Library (South Africa) and published by . This book was released on 1987 with total page 1130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Classified list with author and title index.
Download or read book Metals Abstracts Index written by and published by . This book was released on 1996 with total page 1622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
