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Book German Patent DE3711800 Separation and Purification of Platinum Group Metals and Gold by Solvent Extraction Using a Solution of Substandard Thiourea and Recovering from Organic Phase

Download or read book German Patent DE3711800 Separation and Purification of Platinum Group Metals and Gold by Solvent Extraction Using a Solution of Substandard Thiourea and Recovering from Organic Phase written by and published by . This book was released on 1988 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book German Patent DE3711801 Separation and Purification of Platinum Group Metals and Gold by Precipitation Using Substandard Thiourea s Separation and Recovery

Download or read book German Patent DE3711801 Separation and Purification of Platinum Group Metals and Gold by Precipitation Using Substandard Thiourea s Separation and Recovery written by and published by . This book was released on 1988 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Improved Process for the Separation and Purification of Platinum Group Metals and Gold

Download or read book Improved Process for the Separation and Purification of Platinum Group Metals and Gold written by and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The invention provides a process for the separation and purification of platinum, palladium and/or gold by means of solvent extraction. A high molecular weight tertiary or quaternary amine solvent is used to extract the anionic chloro complexes from the aqueous feed. Any secondary PGM's in the aqueous feed are hydrolysed to complexes which are neutral or cationic. This conditioning is done by boiling 3 to 4 hours below pH 3. The loaded solvent is scrubbed with acid. Palladium and/or gold is stripped with thiourea solution and perchlorite solution is used to strip the platinum but thiocyanate can also be used. Alternatively dilute perchlorite can be used to strip platinum, strong perchlorite for palladium and the gold is then stripped with sodium carbonate solution. Further claims specified the use of resins instead of solvents but no resin details specified. Solvent used most was 5% alamine 336 in solves 150. Other claims included precipitating palladium in strip solution with ethylene and platinum with hydrogen.

Book Separation of Platinum Group Metals and Gold

Download or read book Separation of Platinum Group Metals and Gold written by and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The invention relates to the separation of palladium and/or gold from other PGM's and base metals and/or from each other. With the metals in hydrochloric acid medium it was found that a solvent extractant, di-n-octyl sulphide, extracted only Pd and Au and that whilst the Au was extracted rapidly into the organic phase, the Pd was extracted very slowly. Other effective solvents were found all having functional groups of the formulae R1-S-R where R1 and R may be the same or different each having a carbon atom linked directly to the sulphur atom, R and R1 are independent of each other, are amyl alkyl or aralkyl groups with not more than 20 carbon atoms in each case. The active extractant is carried in an organic diluent (solvesso). Stripping of the gold and/or palladium is done with an acidic solution of thio-urea or palladium alone may be stripped with aqueous ammonia and the gold subsequently stripped with a basic solution of sodium sulphate. Typical solvents used are di-n-decyl sulphide, di-n-hexyl sulphide, methyl-n-hexyl sulphide, tertiary butyl - decyl - sulphide. Iron may be removed from the loaded organic phase by washing with 0,1M HCl. Very high purity Pd can be obtained by stripping loaded organic with concentrated aqueous ammonia. Some of the solvents extract the gold rapidly and can be used as preferential gold extractants. In this case it is critical to effect the organic aqueous separation before extraction of the Pd and back extraction of gold commences.

Book German Patent DD243049 Verfahren Zur Metallischen Abscheidung und Grobtrennung Der Platinmetalle Aus Ihren Salzsauren Losungen Metal Deposition and Coarse Separation of Platinum Group Metals by Dissolving Alloys in Hydrochloric Acid Diluting Then Separating by Ion Exchange

Download or read book German Patent DD243049 Verfahren Zur Metallischen Abscheidung und Grobtrennung Der Platinmetalle Aus Ihren Salzsauren Losungen Metal Deposition and Coarse Separation of Platinum Group Metals by Dissolving Alloys in Hydrochloric Acid Diluting Then Separating by Ion Exchange written by and published by . This book was released on 1987 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Improvements in the Purification and Separation of the Platinum Group Metals and Gold

Download or read book Improvements in the Purification and Separation of the Platinum Group Metals and Gold written by Gerhardus Overbeek and published by . This book was released on 1974 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book WIPO Patent WO9914385 Separation of Platinum Group Metals

Download or read book WIPO Patent WO9914385 Separation of Platinum Group Metals written by and published by . This book was released on 1999 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: