Manufacture of a solution of nitrosylsulfuric acid in sulfuric acid
AssigneeBASF SE
InventorsKarl Schmeidl, Wilhelm Brunkhorst, Eberhard Michaelis
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Abstract
Solutions of nitrosylsulfuric acid in sulfuric acid are manufactured by reacting nitric acid with sulfur in sulfuric acid or oleum. Less than 0.33 gram atom of sulfur is employed per mole of nitric acid, and after completion of the reaction the free nitric acid still present in the nitrosylsulfuric acid solution is reduced with lactones.
Claims6
A process for the manufacture of a solution of nitrosylsulfuric acid in sulfuric acid by reacting nitric acid with sulfur in sulfuric acid or oleum, wherein less than 0.33 gram atom of sulfur is employed per mole of nitric acid and after completion of the reaction the free nitric acid still present in the nitrosylsulfuric acid solution is reduced with a lactone.
Dependencies are inferred from the claim text.