Cobalt tellurium containing

The examined compound behaves as an N,Te-donor ligand also in analogous cobalt and copper complexes [922]. The N,Te-ligand environment is very likely for complexes 530 [923], 531 [924], adduct 532 [925], and tellurium-containing macrocyclic Schiff bases 533 [926] ... 

A tellurium-containing borane without carbon atoms in the Te — B cage was obtained from B10H14 and sodium polytelluride. The telluraborane BioHjjTe was used for the preparation of cobalt, iron, platinum, rhodium, and iridium complexes, in which the TeBioHjo moiety served as the ligand. 

The sulfides of lead, bismuth, nickel, cobalt and thallium were also produced by changing the salt In solution. CdTe was obtained from a DMF solution saturated with tellurium containing 10 gm/l cadmium chloride and 10 gm/l potassium iodide. 

Early catalysts for acrolein synthesis were based on cuprous oxide and other heavy metal oxides deposited on inert siHca or alumina supports (39). Later, catalysts more selective for the oxidation of propylene to acrolein and acrolein to acryHc acid were prepared from bismuth, cobalt, kon, nickel, tin salts, and molybdic, molybdic phosphoric, and molybdic siHcic acids. Preferred second-stage catalysts generally are complex oxides containing molybdenum and vanadium. Other components, such as tungsten, copper, tellurium, and arsenic oxides, have been incorporated to increase low temperature activity and productivity (39,45,46). 

Other examples are [Rh2(CO)2(CsMes)2(/i-Te)] (186), reported by Herrmann (177) from the reaction between [Rh2(C5Me5)2(/i-CO)2] and elemental tellurium, which is assumed to contain a bent, two-coordinate tellurium analogous to that found in 164. Also known is the phosphine cobalt complex [Co2(PMe3)6(/i-Te)2] (187), prepared by Klein (178) from the reaction between the Zintl anion [SnTe4]4 and [CoCl(PMe3)3]. The tellurium... 

INCO produced electrolytic nickel at its refinery in Port Colborne, Ontario, Canada. The production started in 1926. The anodes were made by reducing nickel oxide with coke, and the anodes contained about 93.5% Ni, 4% Cu, and 1% Co. The sulfur content was low, about 0.6%. The approximate composition of the purified electrolyte was 60 g L-1 Ni2+, 95 g L-1 S042-, 35 g L-1 Na+, 55 g L-1 Cl , and 16 g L 1 boric acid, and the temperature was 60 °C. The current density of the process was 16 A/sq.ft (approximately 170 A m-2) and the cell voltage was about 1.6 V. At the normal cell operating voltage, the principal impurities - iron, cobalt, lead, arsenic, and copper - dissolved into the solution with nickel. Silver, gold, the PGMs, sulfur, selenium, and tellurium fell to the bottom of the cell as an insoluble slime. The produced cathodes... 

The properties of anion-exchange resins of several types have been described in detail by Kraus and Nelson 351-356) and others (557, 358). Selenium(IV), tellurium(IV), and arsenic(III) and (V) can be extracted from a variety of media 359-361). Thallium(III) and antimony(V) can be separated using the iodide and chloride forms of Dowex-1 (5(52, 363). Beryllium(II) was efficiently extracted by the carbonate form 364, 365) and chromium(III) and lead(II) by the phosphate form of AV-17 resin 366). Zinc(II) can be removed from a solution containing several metals (5(57, 368) and silver in concentrations at the 0.04-ppb level can be extracted from seawater (5(59). Cobalt(II), zinc(II), antimony(III), silver(I), and iron(III) ions have also been extracted from spiked seawater samples by anion exchange even though the actual form of the ions in the aged solution was uncertain (570). Anion resins have been modified with Trilon B (577) and with a-hydroxyisobutyronitrile (572) to increase the extraction of several trace-metal pollutants. Amberlite IRA 400 treated with the sulfonic acid derivative of dithizone can be used to concentrate heavy metals (575). 

This new inorganic optically active compound has several novel features. Werner s prototype, his "hexol", contained cobalt, a first-row element, and was a cation. F.G. Mann s rhodate, while an anion, contained a second row element. (+) -[Pt(S5)3]2- contains a third-row element. Further, this thioplatinate(IV) shares with the helicene hydrocarbon series the distinction of manifesting molecular optical activity while containing atoms of only two elements. Of course, enantiomorphism is well known in cryst ine binary assemblies (as in ciimabar, HgS, or quartz, Si02) and even in elements (like tellurium). 

Addition of compounds containing divalent sulfur, selenium or tellurium also shortens the induction period and increases the rate of reaction. These compounds are highly active if nickel or cobalt halides are used as catalyst precursors. The increase in the rate of reaction may well be explained by the faster regeneration of the active intermediate nickel carbonyl complexes [370]. 

The definition of a payabie element is somewhat hazy and may depend on the amount that is present in the concentrate. A iead concentrate might contain some potentially valuable minor metals like cobalt, vanadium, tellurium or selenium, for instance, but in such small quantities that the smelter may not pay for them, even though they are being recovered. See Tarring and Robbins (1983) p 58. 

---