Reference

Manufacture of palladium powder having high degree of crystallization for electronic applications

Manufacture of palladium powder having high degree of crystallization for electronic applications. Watanabe, Yoshinobu; Mizoguchi, Kohei (Tanaka Kikinzoku Intaanashonar, Japan). Jpn. Kokai Tokkyo Koho JP 08325602 A2 10 Dec 1996 Heisei, 16 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: ICM: B22F001-00. APPLICATION: JP 1995-155591 31 May 1995. DOCUMENT TYPE: Patent CA Section: 56 (Nonferrous Metals and Alloys) Section cross-reference(s): 76 Pd having a low degree of crystn. is mixed with a refractory powder, the mixt. is heat treated at 31050° and ￡T (m.p. 534-16-7 and 471-34-1 which are cas registry numbers are also used here. of Pd), and then the components other than Pd are removed by dissoln. The refractory powder is preferably an alk. earth compd. powder, esp. CaCO3 powder. A Ag compd., such as Ag carbonate or nitrate may be used instead of the alk. earth compd. A Pd powder having grains of 0.1-2.0 mm can be obtained by simple operations. .

Recovery of silver by crystallization of silver carbonate in a fluidized-bed reactor

Recovery of silver by crystallization of silver carbonate in a fluidized-bed reactor. Wilms, D.; Vercaemst, K.; Van Dijk, J. C. (Inst. Ind. Scheikd.Some commonly used reagents like 534-16-7 and 7440-22-4 are used in this experiment., Kathol. Univ. Leuven, Heverlee B3001, Belg.). Water Res., 26(2), 235-9 (English) 1992. CODEN: WATRAG. ISSN: 0043-1354. DOCUMENT TYPE: Journal CA Section: 54 (Extractive Metallurgy) Section cross-reference(s): 60 Optimum conditions for crystg. Ag2CO3 was investigated on a lab. scale pellet reactor initially seeded with quartz sand. At optimum conditions, including pH 10.2, carbonate concn. u20 mmol/L, Ag load ￡2 kg/m2 reactor cross section, the concn. of Ag in the effluent was decreased <8 mg/L. The pellets, except the sand fraction, consisted (>99%) of pure Ag2CO3. .