Ferrous iodide

Recovery Process. In past years iodine was recovered at Long Beach, California from oil field brine and from natural brines near Shreveport, Louisiana (36,37). The silver process was used. Silver nitrate reacts with sodium iodide to precipitate silver iodide. Added iron forms ferrous iodide and free silver. The ferrous iodide then reacts with chlorine gas to release free iodine. After 1966, the silver process was replaced with the blowing-out process similar to the bromine process. 

Eisen-hydrozyd, n. ferric hydroxide, iron(III) hydroxide, -hydroxydul, n. ferrous hydroxide, iron(II) hydroxide. -jodid,n. iron iodide, specif, ferric iodide, iron(III) iodide, -jodiir, n. ferrous iodide, iron(II) iodide, -jodiirjo-did, n. ferrosoferric iodide, iron(II,IIl) iodide, kalium, n. potassium ferrate, -kaliumalaun,... 

Barium carbonate forms barium iodide on treatment with ferrous iodide solution ... 

In the silver nitrate precipitation process, iodide in the brine is precipitated as silver iodide. The iodide is treated with iron to yield ferrous iodide. Passing chlorine through the ferrous iodide solution liberates iodine. 

Ammino -ferrous Iodides.—Only the hexannninc and the diammine appear to exist. Uexammino-ferrous iodide, [Fe(NH3)6]I2, is a white amorphous powder which is rapidly decomposed by water and by bromine vapour. 

D.3 (a) potassium phosphate (b) iron(II) iodide, ferrous iodide (c) niobium(V) oxide (d) copper(II) sulfate, cupric sulfate... 

Iodine is used for the manufacture of organic compounds, for the manufacture of potassium iodide and sodium iodide, and for the manufacture of other inorganic compounds. Iodine is used as a catalyst in the chlorination of organic compounds and in analytical chemistry for determination of the iodine numbers of oils. Iodine for medicinal, photographic, and pharmaceutical purposes is usually in the form of alkali iodides, prepared through the agency of ferrous iodide. 

Sodium iodide, Nal.—The iodide is prepared by neutralizing sodium hydroxide or earbonate with hydriodic acid or by the action of iodine on sodium hydroxide, and reduction with charcoal of the iodate simultaneously formed or from sodium hydroxide and iodine in presence of iron-filings or ferrous iodide. 

Ammonium iodide, NH4I.—The iodide is formed by methods analogous to those applicable to the bromide.3 It is also a product of the decomposition of nitrogen iodide in presence of water or ammonium hydroxide.4 It is best prepared by addition of alcohol to an aqueous solution of potassium iodide and ammonium sulphate in equimolecular proportions, potassium sulphate crystallizing and ammonium iodide remaining dissolved.5 It can also be prepared by the interaction of ferrous iodide and ammonium carbonate, and by that of ammonium hydroxide and iodine in presence of hydrogen peroxide 6... 

Heated with excess of iodine, iron yields a grey mass of ferrous iodide the same salt is formed when iron filings are triturated with iodine (see below). 

Iron and iodine interact in the presence of water, evolving heat, ferrous iodide passing into solution. The reaction appears to take place in stages involving the formation of ferric iodide, which decomposes into ferric oxide and hydrogen iodide, the last-named attacking the free iron with the formation of ferrous iodide.2... 

Iron Hydride.—It is a moot point as to whether or not a hydride of iron is capable of existence. It has been suggested that ferrous hydride results on treating ferrous iodide with zinc ethyl. Thus... 

The double salt, Fe2S203.8Na2S203.8H20, is obtained 5 by precipitating a mixed solution of ferrous iodide and sodium thiosulphate with alcohol. It forms bright green crystals, readily soluble in water. 

Calcium Phosphate 7783-86-0 Ferrous Iodide Methyl Ethyl Ketone... 

Derivation Action of hydriodic acid on barium hydroxide or of barium carbonate on ferrous iodide solution. 

Southard and Curtis reported the synthesis of conjugated polymers by reacting ferrous iodide with an isomeric mixture of bis(alkylcyclopentadienide)arenes.87,88,89 This reaction generated high molecular-weight polymers with high polydispersities oxidation of polymers 42a, b resulted in electrical conductivities between 10 10 and 10 7S/cm. 

The reagent is prepared1 by the reaction in ether of 3 equivalents of methyl-lithium with 1 equiv. of ferrous iodide (—20°, N2 atmosphere). The reagent decomposes appreciably upon storage at 0° for several hours. 

In this way the cadmium atom (with the configuration 2, 8, 18, 18, 5s2) effectively acquires ten electrons to give the configuration 2, 8, 18, 18, s2 pQ5d and there are available one 5s, three 5p and two 5d orbitals to form spzd2 hybrid bonds with the characteristic octahedral distribution actually observed (see table 4.01). It should be noted, however, that the bonds are not of the same kind in all of the halides. In ferrous iodide, for example, the iron atom (2, 8, 14, 4s2) acquires the configuration 2, 8, 18, 4s2, 4p6, and the bond formation is due to two 3d, one 45 and three 4/) orbitals. These d2spz hybrid bonds, however, are also octa-hedrally disposed. 

Incompat Acids, alkalies, alum, ammonia water, amyl nitrite benzoates betanaphthol, phenol, calomel, chloral hydrate, copper sulfate, ferric chloride ferrous sulfate chromium trioxide (chromic acid), cinchona alkaloids, hydrocyanic acid iodides iodine Lead subacetate mercuric chloride, orthoform potassium permanganate, resorcinol, sod. bicarbonate sod. salicylate (in powder) soln arsenic and mercury iodide, spirit nitrous ether (unless prescribed with sod, bicarbonate), syrup ferrous iodide, tartar emetic tannic acid, thymol, urethane, infusions of catechu, cinchona, rose leaves and uva ursi tinctures of catechu, ferric chloride, cinchona, hamanielis iodine, kino, and rhubarb. 

The results represented in Fig. 3 show that the yield of glycolic acid passes through a maximum as the concentration of the iodide increases. The optimum concentrations correspond to a metal silica ratio of 6 4 for nickel iodide and 5 5 for cobalt and ferrous iodides. The carbon dioxide formation shows a flat maximum for metal silica ratios of 4 6 to 7 3. 

In any catalytic work it is very important to know how long the same catalyst can be used without loss in activity. In order to find out the life of nickel, cobalt, and ferrous iodides catalysts, a number of runs of hrs. duration each were conducted on the same catalyst, and it was found that the yields of glycolic acid remained practically the same up to the fifth run, after which there was a slight decrease in the yields. 

Composition.—Ferrous iodide, Fel2, with about eighteen per cent, of water of crystallization, and a little ferric oxide. 

Conjugated polymers have also been prepared via reaction of dilithio bis(3-hexyl-4-methylcyclopentadienide)arylenes (38) with ferrous iodide (82). Using a similar strategy, poly(ferrocenylsilane) was prepared by reaction of the dilithium salt of dicyclopentadienyldimethylsilane (38, R = Si(CH3)2, R, R" = H) with ferrous chloride (83) (eq. ID-... 

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