Sodium iodate nitrate

Most iodine produced commercially comes from the sodium iodate(V) remaining after sodium nitrate has been crystallised from Chile saltpetre. The iodatefV) is first reduced to iodide by blowing sulphur dioxide into the solution (or by addition of sodium sulphite) ... 

Potassium perchlorate Powdered metals Sodium iodate Metals Sodium nitrate Magnesium MRH 8.58/58... 

Palladium(II) oxide, 4825 Palladium(IV) oxide, 4835 Perchloric acid, 3998 Periodic acid, 4425 Permanganic acid, 4434 Peroxodisulfuric acid, 4482 Peroxodisulfuryl difluoride, 4328 Peroxomonosulfuric acid, 4481 Peroxytrifluoroacetic acid, 0666 Platinum hexafluoride, 4371 Platinum(IV) oxide, 4836 Plutonium hexafluoride, 4372 Potassium bromate, 0255 Potassium chlorate, 4017 Potassium dichromate, 4248 Potassium iodate, 4619 Potassium nitrate, 4650 Potassium nitrite, 4649 Potassium perchlorate, 4018 Potassium periodate, 4620 Potassium permanganate, 4647 Rhenium hexafluoride, 4373 Rubidium fluoroxysulfate, 4309 Ruthenium(VIII) oxide, 4862 Selenium dioxide, 4838 Selenium dioxide, 4838 Silver permanganate, 0021 Sodium chlorate, 4039 Sodium chlorite, 4038 Sodium dichromate, 4250 Sodium iodate, 4624 Sodium nitrate, 4721 Sodium nitrite, 4720... 

Chilean saltpeter [potassium nitrate (KNOj)] has a number of impurities, including sodium and calcium iodate. Iodine is separated from the impurities and, after being treated chemically, finally produces diatomic iodine. Today, iodine is mostly recovered from sodium iodate (NalO ) and sodium periodate (NalO ) obtained from Chile and Bohvia. 

Oxidation of an Fe" salt solution with air, urotropin, sodium iodate or sodium nitrate or with air in the presence of a complexing agent such as pyridine or sodium thiosulphate (Robl, 1958). 

Iodine is produced in large scale from Chilean nitrate. Iodine occurs in this mineral as sodium iodate, NalOs. The iodate extract of the mineral becomes more concentrated in iodate after sodium nitrate crystaUizes out. The mother liquor is then treated with sodium bisulfite solution to give sodium iodide ... 

Formerly all the iodine was made from the ash of seaweed, and potash was a remunerative appendix to the iodine industry but just as the Stassfurt salts killed those industries which extracted potash from other sources, so did the separation of iodine from the caliche mother-liquors threaten the industrial extraction of iodine from seaweed with extinction. Iodine in a very crude form was exported from Chili in 1874—e.g. a sample was reported with iodine 52-5 per cent. iodine chloride, 3-3 sodium iodate, 13 potassium and sodium nitrate and sulphate, 15 9 magnesium chloride, 0 4 insoluble matter, 1 5 water, 25-2 per cent. About that time much of the iodine was imported as cuprous iodide. This rendered necessary the purification of the Chilian product but now the iodine is purified in Chili before it is exported. The capacity of the Chilian nitre works for the extraction of iodine is greater than the world s demand. It is said that the existing Chilian factories could produce about 5100 tons of iodine per annum whereas the... 

A. Connell (1802) 140 obtained a white precipitate—ferrous iodate—by boiling a soln. of iron in iodic acid, and C. F. Rammelsberg found that the addition of potassium iodate to ferrous sulphate gives a yellowish-white precipitate which is decomposed when heated. It is sparingly soluble in nitric acid, and it dissolves in an excess of ferrous sulphate, and the soln., when heated, precipitates basic ferric iodate. A. Ditte mixed boiling soln. of a ferric salt and an alkali iodate and obtained a brown precipitate—ferric iodate—insoluble in hot nitric acid diluted with its own volume of water. Crystals can be obtained by mixing warm dil. soln. of ferric nitrate, acidified with nitric acid, and sodium iodate. The precipitate... 

See Carbon dioxide, above Ammonium nitrate Metals Barium peroxide Metals Dinitrogen tetraoxide Metals Hydrogen peroxide Metals Lead(IV)oxide Metals Nitric acid Metals Oxygen (Liquid) Metals Potassium chlorate Metals Potassium perchlorate Powdered metals Sodium iodate Metals Sodium nitrate Magnesium See Halogens etc., above See Metal oxides, above See Metal oxosalts, above See Sulfur, etc., below... 

Sodium chlorate, 4033 Sodium chlorite, 4032 Sodium dichromate, 4244 Sodium iodate, 4619 Sodium nitrate, 4716 Sodium nitrite, 4715 Sodium perchlorate, 4034 Sodium permanganate, 4698 Sodium peroxide, 4797 Sodium peroxodisulfate, 4803 f Sulfur, 4891 Sulfur trioxide, 4843 Sulfuric acid, 4473... 

Iodine also occurs in seawater and in numerous seaweeds including kelp, from which iodine has been extracted on a commercial scale. The greater part of the iodine of commerce is obtained from sodium iodate (NalOs) and sodium periodate (NaI04), both of which are associated with the enormous deposits of sodium nitrate in Chile. 

In addition to relatively small amounts of iodine that are extracted from the ashes of kelp, the great bulk of iodine produced commercially is obtained from sodium iodate. This compound occurs along with sodium nitrate (Chile saltpeter), and the iodine is extracted by treating the iodate with sodium hydrogen sulfite ... 

Cesium nitrate Strontium nitrate Sodium nitrite Smoke Smoke Smoke Sodium bromate Potassium bromate Sodium iodate Smoke Smoke Smoke... 

Sodium iodate, NaI03.—The iodate is a constituent of Chile saltpetre or sodium nitrate, and remains in the mother-liquor after crystallization of the nitrate. It is an important source of iodine. The salt can be prepared by oxidizing sodium iodide with sodium peroxide6 or by the electrolytic method,7 and also by the interaction of sodium iodide and periodate.8 It forms white crystals. 

Sodium nitrate, NaN03.—Immense deposits of sodium nitrate are situated in Chile, hence the name Chile saltpetre. The local name is Caliche. The origin of the deposits is a matter of dispute.2 The crude product is contaminated with clay and sand, and is purified by crystallization from water. An important impurity is sodium iodate, a valuable source of iodine.8 Analyses have been given by Machattie 4 (I.) and Schulze5 (II.), the numbers expressing percentages ... 

The mother liquors now contain about 40 lbs. of nitrate per cubic foot, and are used in the systematic lixiviation of the caliche described above, being run (in addition to the weak liquor from the final exhaustion of the caliche) on to the subsequent caliche. These mother liquors, however, contain much iodine in the form of sodium iodate, from which the iodine must first be recovered in the manner described ia the section on Iodine in Martin s Industrial Chemistry, Vol. II. From the iodine house the mother liquors are passed on to the lixiviating tanks, to lie used once more, as above described, m extracting crude caliche. The iodine recovered in this way is now an important article of commerce. 

Chilean niter deposits are mosdy sodium nitrate, but they also contain 0.3% iodine in the form of calcium iodate, Ca(I03)2. After the sodium nitrate in the niter is dissolved and recrystallized, the remaining solution contains 9 g/L sodium iodate, NaI03(aq). The NaI03 is converted to iodine when it reacts with sulfur dioxide and water. 

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