Cobalt hydroxide oxide

Tricobalt tetroxide is obtained when cobalt(ll) carbonate, cobalt(ll) or cobalt(III) oxide, or cobalt hydroxide oxide, CoO(OH) is heated in air at temperatures above 265°C. The temperature must not exceed 800°C (see decomposition temperature above). 

Cobalt hydroxide oxide Cobalt hydroxide oxide (CoO(OH)) Cobalt oxide hydroxide Cobalt oxyhydroxide Cobaitic oxide monohydrate Cobalt(lll) oxide monohydrate EINECS 234-614-7. Oxidation catalyst Dark brown-black powder insoluble in H2O. 

Cobalt hydroxide oxide 914 Coban (as sodium salt) 2566... 

Basic oxides of metals such as Co, Mn, Fe, and Cu catalyze the decomposition of chlorate by lowering the decomposition temperature. Consequendy, less fuel is needed and the reaction continues at a lower temperature. Cobalt metal, which forms the basic oxide in situ, lowers the decomposition of pure sodium chlorate from 478 to 280°C while serving as fuel (6,7). Composition of a cobalt-fueled system, compared with an iron-fueled system, is 90 wt % NaClO, 4 wt % Co, and 6 wt % glass fiber vs 86% NaClO, 4% Fe, 6% glass fiber, and 4% BaO. Initiation of the former is at 270°C, compared to 370°C for the iron-fueled candle. Cobalt hydroxide produces a more pronounced lowering of the decomposition temperature than the metal alone, although the water produced by decomposition of the hydroxide to form the oxide is thought to increase chlorine contaminate levels. Alkaline earths and transition-metal ferrates also have catalytic activity and improve chlorine retention (8). 

Cobalt(II) acetylacetonate [14024-48-7] cobalt(II) ethyUiexanoate [136-52-7] cobalt(II) oleate [14666-94-5] cobalt(II) linoleate [14666-96-7] cobalt(II) formate [6424-20-0], and cobalt(II) resinate can be produced by metathesis reaction of cobalt salt solutions and the sodium salt of the organic acid, by oxidation of cobalt metal in the presence of the acid, and by neutralization of the acid using cobalt carbonate or cobalt hydroxide. 

Kobaltoxyd, n. cobalt oxide, specif, cobaltic oxide, cobalt(III) oxide, -hydrat, n. cobalt hydroxide, -oxydul, n. cobaltocobaltic oxide, cobalt(II,III) oxide. 

The catalyst is a cobalt carbonyl that is prepared in situ from cobaltous hydroxide, and nonylpyridine is the promotor. Oxidation of the aldehyde produces 3-hydroxypropionic acid. 1,3-Propanediol and 3-hydroxypropi-onic acid could also be produced from acrolein (Chaper 8). ... 

D.19 You come across some old bottles in a storeroom that are labeled (a) cobaltic oxide monohvdrate, (b) cobaltous hydroxide. Using Appendix 3C as a guide, write their modern names and chemical formulas. 

Miscellaneous copper oxide and cobalt hydroxide cements... 

Tri-ethylene diamine Cobalt hydroxide [Co(en)3](OH)2 Cooxen Good solvating properties, extensive oxidative degradation, coloured (claret)... 

Cobalt(IIl) oxide is obtained as a brown precipitate Co203.aq when cobalt(II) hydroxide is oxidised in alkaline conditions (or when a cobalt(III) is decomposed by aqueous alkali). On heating it gives the black mixed oxide Co304. 

Reactions with alkali hydroxide yield cobalt(II) hydroxide. Cobalt(II) oxide is readily reduced by hydrogen, carbon or carbon monoxide to cobalt ... 

Cobalt(II) suhate is prepared by dissolving cobalt(II) oxide, hydroxide or carbonate in dilute suhuric acid, followed by crystaUization ... 

Aquo-pentammino-cobaltic Hydroxide.—A hydroxide, possibly of formula [Co(XH3)5H20](OH)3, has been formed in solution either by the decomposition of the chloride, [Co(NH3)5H20]C13, of the series with moist silver oxide, or by the decomposition of a cold aqueous solution of the sulphate with barium hydroxide thus ... 

Cobalt Hydroxides. See under Cobalt Oxides Hydroxides... 

Ammonia is determined by the Kjeldahl method. Cobalt is determined by decomposing the salt with aqueous sodium hydroxide, dissolving the cobalt(III) oxide in acidified potassium iodide, and titrating the liberated iodine with thiosulfate. Anal. Calcd. for Co(NH3)3H20(C1)2C1 Co, 25.0 NH3, 21.6. Found Co, 24.6 NH3, 21.8. 

The temperature required for the reduction of cobalt oxides to the metal appears to be somewhat higher than for the reduction of nickel oxide. The catalyst with a higher catalytic activity is obtained by reduction of cobalt hydroxide (or basic carbonate) than by reduction of the cobalt oxide obtained by calcination of cobalt nitrate, as compared in the decomposition of formic acid.91 Winans obtained good results by using a technical cobalt oxide activated by freshly calcined powdered calcium oxide in the hydrogenation of aniline at 280°C and an initial hydrogen pressure of 10 MPa (Section... 

Like its ferrous analogue, cobalt hydroxide readily absorbs oxygen, yielding a brown mass. When dissolved in acids stable cobaltous salts are obtained, but when dissolved in hot, concentrated aqueous potassium hydroxide and allowed to cool, cobaltous oxide gradually crystallines in microscopic prisms 5 which are deposited as a violet powder. The crystals are pleochroic, of density 3-597 at 15° C-, permanent in air and insoluble in ammonium hydroxide. They are soluble in acetic acid, in sodium hydroxide, and in hot solutions of ammonium chloride. 

Cobalto-cobaltic oxide has been prepared in three states of hydration. The trihydrate, Co304.3H20, results on warming cobaltous hydroxide with potassium persulphate and heating the resulting product to 100° C. with dilute nitric acid.1 It is also produced as a brown precipitate on boiling a solution of roseo-cobaltic sulphate. 

Cobalt ferrocyanide, Co2Fe(CN)6.7H20,9 is obtained by neutralising the free acid with cobalt hydroxide. It is less stable than the corresponding nickel salt. It is green in colour oxidised by chlorine water to ferricyanide and by bromine water to hydrated cobaltic oxide.10... 

In most of its ionic compounds, cobalt is either Co(II) or Co(III). One such compound, containing chloride ion and waters of hydration, was analyzed, and the following results were obtained. A 0.256-g sample of the compound was dissolved in water, and excess silver nitrate was added. The silver chloride was filtered, dried, and weighed, and it had a mass of 0.308 g. A second sample of 0.416 g of the compound was dissolved in water, and an excess of sodium hydroxide was added. The hydroxide salt was filtered and heated in a flame, forming cobalt(III) oxide. The mass of the cobalt(III) oxide formed was 0.145 g. 

---