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

Sample text

4 [1960] 56/8; Soviet J. 4 [1960] 70/2). [12] J. T. May, C. L. S. Bur. Mines Rept. Invest. No. A. 57 [1962]14775). [13] Deutsche GoLd- und SiLber-ScheideanstaLt vorm. RoessLer (Fr. 858443 [1938/40] 1/5; C. 1941 II 807). [14] H. von Zeppelin, K. Hoffmann, H. KaLhammer (Ger. A. 64 [1966] 4674). [15] R. 0. Bach, BeryLlium MetaLs & ChemicaLs Corp. S. A. 65 [1966] 373). [16] Beryllium MetaLs & ChemicaLs Corp. (Fr. A. 67 [1967] No. 75525). [17] R. 0. Bach, BeryLlium MetaLs & ChemicaLs Corp. (Brit. A.

E. Burke, The Metal Beryllium, Cleveland, Ohio, 1955, pp. 63/70, 66). [27] H. Kawecki (Trans. Electrochem. Soc. 89 [1946) 229/36, 233). [28] H. Kawecki, G. F. Simons, Beryllium Corp. S. A. 1951 1489). [29) D. A. Everest, E. Napier (Proc. 6th Intern. Congr. Mineral. , Cannes 1963 [1964], pp. A. 62 [1965]15811). 3 With Alkaline Agents Beryl or Be concentrates can be decomposed by sintering or melting with alkali hydroxides (300 to 400 cG), alkali carbonates (700 to 1000 cG), CaO or CaC0 3 (1200 to 1300°C), Ca(OHh at Pe=30 atm, or by heating with concentrated aqueous NaOH (or KOH) under Pe = 3 to 6 atm at temperatures below 200 cC.

Granular Be(OH)2 was precipitated by NaOH at pH = 12 as described above [18]. The Na2BeF4 formed in the reaction was converted into the more soluble (NH4)2BeF4 by treating the finely ground sinter with a small stoichiometric excess of (NH4)2SiFs in the presence of water at room temperature. The resulting solution of (NH4hBeF4 was separated from the very slightly soluble Na2SiF s (and the oxides) by filtration and evaporated to give the crystallized salt [28]. Gmelin Handbook Be Suppl. Vol. A 1 The Production of Beryllium 24 Fig.

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