Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: III. THE SEPARATION OF URANIUM. SEPARATIONS FROM IRON. By Acetates.—The separation of uranium from iron, by precipitating the latter as basic acetate, was referred to in a general way by Gibbs,1 but no particulars were given. Some phases of the process were studied by Rheineck,2 who suggested that the operation was a delicate one, and observed that a crystalline precipitate is formed at once in concentrated, and, after some time, in more dilute solutions, when sodium acetate is added to any salt of the oxide of uranium. The following experiments were made with the object of determining in which direction the weakness of the separation lay, rather than with the idea of improving it for regular service. Five grams of bar iron were dissolved in hydrochloric, and oxidized with nitric acid, 25 grams ammonium chloride and 150 c.c. standard uranium solution 1 Chemical News, xi. 102. 2 Chemical News; xxiii. 233. added, and the mixture then neutralized and divided into five equal portions. (a) Was diluted to 300 c.c., and boiled. The iron was almost entirely precipitated, and no acetate whatever was added: 02055 gram uranium was found in the filtrate, instead of 02045 gram. (d) Five cubic centimetres strong ammonium acetate were added, which precipitated the iron immediately in the cold. The solution was then boiled three or four minutes. The filtrate contained only 0-0853 gram uranium. (c) Treated like (b], but 10 c.c. acetic acid were added before the acetate. A precipitate formed after very little heating. The filtrate contained 01994 gram uranium. (d) Treated as (a), but added 05 c.c. acetate to the boiling solution, to completely precipitate the iron—02000 gram uranium in the filtrate. (e) Treated as (a), but added 5 c.c. acetic acid to the cold soluti... --This text refers to an alternate Paperback edition.