Hydrolysis hydroxylamine disulfonate

The precipitated potassium hydroxylamine disulfonate is expeditely filtered from the cold liquid, and the moist salt is dissolved in 500ml of N/2 hydrochloric acid. The solution is heated on the water bath for two hours and then well cooled in ice while 59g of potassium bicarbonate is added in small portions (foaming ) to the liquid in order to neutralize the free acid formed in the hydrolysis. The final solution should be adjusted to a faint add reaction with... 

Hydrolysis of Hydroxylamine Disulfonate (HAPS). HADS hydrolyzes to give hydroxylamine monosulfonate (HAMS) and sulfates ... 

Hydroxylamine salts are made commercially in two ways the hydrolysis of primary nitroparaffins and the cathodic reduction of nitric acid. In the laboratory it is easiest to reduce nitrous acid with a bisulfite and then hydrolyze the resulting salt of hydroxylamine disulfonic acid. The reactions are as follows ... 

The hydroxylamine used for the reaction with cyclohexanone is obtained by the Raschig process or by catalytic hydrogenation of either nitric oxide or nitric add. In the Raschig process, the hydroxylamine is obtained in the form of its sulfate. The raw materials for this process are sulfur dioxide, ammonia, carbon dioxide, and water. A mixture of NO and NO2, as obtained from the catalytic oxidation of ammonia, is absorbed in an aqueous ammonium carbonate solution to yield ammonium nitrite, which is then reacted with SO2 in the presence of ammonium hydroxide. The product of this reaction is hydroxylamine disulfonate, which converts upon hydrolysis via the monosulfonic acid hydroxylamine into hydroxylamine sulfate ... 

Hydroxylamine trisulfonates, e.g. (K03S)0N-(S03K)2 are made by the reaction of K2SO3 with potassium nitrosodisulfonate (Fremy s salt). Acidification of the product results in rapid hydrolysis to the 0,A-disulfonate which can be isolated as the exclusive product ... 

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