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

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

ISBN-10: 3662103176

ISBN-13: 9783662103173

ISBN-10: 3662103192

ISBN-13: 9783662103197

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

Example text

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. In most cases, the alkaline treatment is followed by an acid leaching (generally H2S0 4 ) to give solutions containing Be, Al, and Fe sulfates as well as alkali sulfates [1).

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.

Vol. A 1 Decomposition of Minerals with Fluorinating Agents 23 in an excess of NaOH solution at 50°C. After the coagulation of Fe(OHb was complete, the solution was filtered and the filtrate containing the beryllate kept near boiling for 1 h to precipitate granular Be(OH)2. The precipitate was decanted and washed with demineralized water and NH 4Cl solution until free from NaOH. 0% NaF impurities (% based on BeO), Bryant [20]. 95 weight ratio produced the best results. 74 J-lm) was leached three times with water to give a combined extract which recovered up to 96% of the beryllium from the ore [21], also see Morana, Simons [19].

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Be Beryllium: Supplement Volume A1 The Element. Production, Atom, Molecules, Chemical Behavior, Toxicology by Ingeborg Hinz, Karl Koeber, Irmingard Kreuzbichler, Peter Kuhn, Arnulf Seidel (auth.), Ingeborg Hinz, Hans Karl Kugler, Joachim Wagner (eds.)


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