Be Beryllium: Supplement Volume A1 The Element. Production, by Ingeborg Hinz, Karl Koeber, Irmingard Kreuzbichler, Peter

By Ingeborg Hinz, Karl Koeber, Irmingard Kreuzbichler, Peter Kuhn, Arnulf Seidel (auth.), Ingeborg Hinz, Hans Karl Kugler, Joachim Wagner (eds.)

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Extra info for Be Beryllium: Supplement Volume A1 The Element. Production, Atom, Molecules, Chemical Behavior, Toxicology

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Mineral. A. 85 [1976] No. 180611). [4] W. A. Mod, C. W. Becker, Dow ChemicaL Co. S. A. 62 [1965] 15818). [5] J. K. Grunig, W. B. Davis, W. C. S. A. 77 [1972] No. 166770; Ger. A. 72 [1970] No. 23740). [6] P. H. Johnson, H. E. S. A. 65 [1966] 11856). [7] W. J. Biermann, BeryLoy, Ltd. S. A. 66 [1967] No. 58128; Can. A. 68 [1968] No. 23836). [8] M. DeLcorte, A. Lecocq, 0. StuLzaft (Fr. A. 65 [1966]10200). [9] L. Crocker, R. 0. Dannenberg, D. W. S. Bur.

Brit. A. 64 [1966]17114). [18] Beryllium MetaLs & ChemicaLs Corp. (Fr. A. 62 [1965]11466). [19] D. Gardner (Brit. 482531 [1936/38]1/3; C. 193811 764). 96% BeQ) were peLLeted with carbon in a 10:4 weight ratio and dried at 110°C. 5%, respectiveLy, of the BeQ content into soLubLe BeF 2 which was extracted by hot water. Precipitation with ammonium hydroxide and ignition to the oxides gave a product which contained 62 to 70% BeO with Fe, AL, and Si as the major impurities, May, Hoatson [1]. Treatment of the crude beryL ore with gaseous HF at 400 to 600°C produced soLubLe BeF 2 and voLatiLe SiF 4 Leaving insoLubLe CaF 2 , AL 20 3 , and Fe 20 3 .

For earlier batch tests under similar conditions, see Havens et at. [7]. For batch tests employing NaF, (NaP0 3 )6' Na 4 P2 0 7 , and borax as depressing agents, see Havens [8]. Fine particles «5 and <44I-lm) of phenacite are much less readily floated by oleic acid than larger ones because they require a longer treatment by the collector as a consequence of their large absorption capacity [9]. IR studies of colloidal suspensions of a phenacite mineral «250 I-lm) conditioned with oleic acid show that phenacite reacts with oleic acid to form a chemisorbed oleate monolayer on its surface which is associated with a displacement of the OH - and silicate anions from the mineral surface.

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