Download or read book Progress Report on 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 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

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:

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:

Download or read book Uranium Recovery from Wet Process Phosphoric Acid History and Present Status written by and published by . This book was released on with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Recovery of Uranium from Industrial Phosphoric Acids by Solvent Extraction written by D. A. Ellis and published by . This book was released on 1952 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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:

Download or read book Recent Studies of Uranium Recovery from Wet process Phosphoric Acid with Octylphenyl Acid Phosphate written by and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Commercial OPAP is a complex mixture that contains at least 11 components. Octyl phenol is the principal impurity. Commercial OPAP contains readily-hydrolyzable material. The concentrations of octyl phenol and an unidentified impurity increase in the hydrolyzed product. Uranium extraction power is decreased slightly by hydrolysis of the reagent. Four major problems were encountered in continuous stability tests: (1) Microemulsion or micelle formation--loss of organic phase into phosphoric acid. We do not have a solution to this problem at this time. It could involve alteration of the organic, e.g., adding a modifier, changing the reagent structure, or changing the diluent. (2) Reagent poisoning--reduction of uranium extraction and interference with organic titrations by material extracted from the acid. Additional work is needed to identify the poisoning material or materials. It can then be removed if it originates in the phosphate rock, or avoided if it originates in chemicals added during processing. (3) Crystallization with iron--loss of both major components of the reagent as a complex with ferric iron. We believe this problem can be controlled by controlling the ferric iron concentration in the phosphoric acid. (4) MOPPA distribution loss--a selective loss to the aqueous phase. We believe this can be minimized by controlling the iron concentration of the phosphoric acid. The iron concentration will need to be kept low enough to avoid reagent crystallization and high enough to avoid MOPPA distribution loss. 15 figs.

Download or read book Uranium Recovery written by Henry M. Heidt and published by . This book was released on 1955 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Uranium Recovery from Raw Materials written by and published by . This book was released on 1956 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Topical Report on Chemical Process to Recover Uranium from Phosphate Rock written by and published by . This book was released on 1948 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This topical report describes progress made in chemical dissolution and recovery of uranium from phosphate rock. It covers approximately the period from November 15, 1947, to January 15, 1948, but the figures and other data are in part based on investigations since the start of this project. Two outstanding developments are: (1) an increase in the dissolution of uranium from the rock with sulphuric acid from about 55 percent to about 85 percent and (2) an increase in recovery of uranium from solution from about 50 percent to 90 to 95 percent. The increase in dissolution was obtained by calcining the rock prior to leaching. The better recovery resulted from use of larger amounts of amine in the precipitation. The indicated over-all recovery, not yet fully worked out on solutions from calcined rock, is about 80 percent.

Download or read book Development of a Char in pulp Process for the Recovery of Uranium written by Paul Noble and published by . This book was released on 1955 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recovery of Uranium from Phosphate Rock written by and published by . This book was released on 1956 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Recovery of Uranium from Commercial 30 Phosphoric Acid with Antimony written by R. H. Bailes and published by . This book was released on 1950 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potential Radiological Impacts of Recovery of Uranium from Wet process Phosphoric Acid written by Oak Ridge National Laboratory. Chemical Technology Division and published by . This book was released on 1979 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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:

Download or read book Potential radiological impacts of recovery of uranium from wet process phosphoric acid written by W. Davis and published by . This book was released on 1979 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: