Sodium chlorate thiosulfate

Chromium Removal System. Chlorate manufacturers must remove chromium from the chlorate solution as a result of environmental regulations. During crystallization of sodium chlorate, essentially all of the sodium dichromate is recycled back to the electrolyzer. Alternatively, hexavalent chromium, Cr, can be reduced and coprecipitated in an agitated reactor using a choice of reducing agents, eg, sodium sulfide, sulfite, thiosulfate, hydrosulfite, hydrazine, etc. The product is chromium(III) oxide [1333-82-0] (98—106). Ion exchange and solvent extraction techniques have also... 

MRH Aluminium 10.71/33, iron 4.35/50, magnesium 10.88/40, manganese 5.06/50, sodium 5.56/55, phosphorus 7.32/25, sulfur 4.27/20 Mixtures of the chlorate with ammonium salts, powdered metals, phosphorus, silicon, sulfur or sulfides are readily ignited and potentially explosive [1], Residues of ammonium thiosulfate in a bulk road tanker contaminated the consignment of dry sodium chlorate subsequently loaded, and exothermic reaction occurred with gas evolution during several hours. Laboratory tests showed that such a mixture could be made to decompose explosively. A reaction mechanism is suggested. 

Silver Nitrate Sodium Thiosulfate Stannous Chloride Tin (II) Chloride Potassium Bisulfite Potassium Hydrogen Sulfite Ammonium Sulfamate Sodium Chlorate Sodium Chromate... 

Procedure. A weighed sample (close to 0.1 g.) is added to an iodine flask containing 40 ml. of a solution prepared by dissolving 2 g. of potassium iodide in dilute (not over 2 N) hydrochloric acid. The resulting solution is titrated immediately with standardized 0.1 AT sodium thiosulfate until the yellow color of the iodine just vanishes. Any yellow color which may then develop on standing as a result of oxidation of iodide ion by chlorate ion is ignored. 

Intravenous sodium thiosulfate (see p 505) may inactivate the chlorate ion and has been reported successful in anecdotal reports. However, this treatment has not been clinically tested. Administration eis a lavage fluid may potentially produce some hydrogen sulfide, and so is contraindicated. 

Aieta et al. [10] worked out electrometric titrations for the sequential determination of chlorine dioxide, chlorine, chlorite, and chlorate. Phenylarsine oxide or sodium thiosulfate titrants and potentiometric or amperometric endpoint detection are used in their method. 

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