Verfahren zur Gewinnung von N, O-Dimethylhydroxylamin aus O-Methylhydroxyl- und N, O-Dimethylhydroxylamin enthaltenden Gemischen

摘要

N,O-Dimethylhydroxylamine is isolated from a mixture of O-methylhydroxylamine and N,O-dimethylhydroxylamine by adding formaldehyde to the mixture and removing the O-methylformaldoxime formed, preferably as a gas by heating. Where the starting mixture is an aqueous solution of the two compounds heating at a pH of below 7 removes the O-methylformaldoxime leaving a solution from which, after the pH is raised above 7, the O,N-dimethylhydroxylamine may be distilled off. Specification 852,422 is referred to.