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South African Patent Za838268 Procedure For Recovering Uranium Yttrium And Thorium And Rare Earth Metals Contained In A Mineral Phosphate During Wet Process Preparation Of Phosphoric Acid
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Book Synopsis South African Patent : ZA838268 : Procedure for Recovering Uranium, Yttrium and Thorium and Rare-earth Metals Contained in a Mineral Phosphate During Wet-process Preparation of Phosphoric Acid by :
Download or read book South African Patent : ZA838268 : Procedure for Recovering Uranium, Yttrium and Thorium and Rare-earth Metals Contained in a Mineral Phosphate During Wet-process Preparation of Phosphoric Acid written by and published by . This book was released on 1983 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis South African Patent : ZA713457 : Reductive Stripping Process for the Recovery of Uranium from Wet Process Phosphoric Acid by :
Download or read book South African Patent : ZA713457 : Reductive Stripping Process for the Recovery of Uranium from Wet Process Phosphoric Acid written by and published by . This book was released on 1970 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recovery of Uranium from Superphosphate by : A. W. Andresen
Download or read book Recovery of Uranium from Superphosphate written by A. W. Andresen and published by . This book was released on 1955 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uranium Recovery from Wet-process Phosphoric Acid with Octylphenyl Acid Phosphate by : W. D. Arnold
Download or read book Uranium Recovery from Wet-process Phosphoric Acid with Octylphenyl Acid Phosphate written by W. D. Arnold and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uranium Recovery from Wet-process Phosphoric Acid with Octylphenyl Acid Phosphate by :
Download or read book Uranium Recovery from Wet-process Phosphoric Acid with Octylphenyl Acid Phosphate written by and published by . This book was released on 19?? with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uranium Recovery from Phosphates and Phosphoric Acid by : Sebastian Huwyler
Download or read book Uranium Recovery from Phosphates and Phosphoric Acid written by Sebastian Huwyler and published by . This book was released on 1981 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uranium Recovery from Phosphates and Phosphoric Acid by : Sebastian Huwyler
Download or read book Uranium Recovery from Phosphates and Phosphoric Acid written by Sebastian Huwyler and published by . This book was released on 1983 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recovery of Uranium from Wet-process Phosphoric Acid Using the Depa-topo Process by :
Download or read book Recovery of Uranium from Wet-process Phosphoric Acid Using the Depa-topo Process written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uranium Recovery from Wet-process Phosphoric Acid with Octylphenyl Acid Phosphate. Progress Report by :
Download or read book Uranium Recovery from Wet-process Phosphoric Acid with Octylphenyl Acid Phosphate. Progress Report written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies were continued of a process for recovering uranium from wet-process phosphoric acid with octylphenyl acid phosphate (OPAP), a mixture of mono- and dioctylphenyl phosphoric acids. The mixture contained at least nine impurities, the principal one being octyl phenol, and also material that readily hydrolyzed to octyl phenol and orthophosphoric acid. The combination of mono- and dioctylphenyl phosphoric acids was the principal uranium extractant, but some of the impurities also extracted uranium. Hydrolysis of the extractant had little effect on uranium extraction, as did the presence of moderate concentrations of octyl phenol and trioctylphenyl phosphate. Diluent choice among refined kerosenes, naphthenic mixtures, and paraffinic hydrocarbons also had little effect on uranium extraction, but extraction was much lower when an aromatic diluent was used. Purified OPAP fractions were sparingly soluble in aliphatic hydrocarbon diluents. The solubility was increased by the presence of impurities such as octyl phenol, and by the addition of water or an acidic solution to the extractant-diluent mixture. In continuous stability tests, extractant loss by distribution to the aqueous phase was much less to wet-process phosphoric acid than to reagent grade acid. Uranium recovery from wet-process acid decreased steadily because of the combined effects of extractant poisoning and precipitation of the extractant as a complex with ferric iron. Unaccountable losses of organic phase volume occurred in the continuous tests. While attempts to recover the lost organic phase were unsuccessful, the test results indicate it was not lost by entrainment or dissolution in the phosphoric acid solutions. 21 figures, 8 tables.
