Process for preparing monomethylhydrazine
AssigneeSaltigo GmbH
InventorsUwe Boger, Ulrich Notheis, Mathias Siekmann
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Abstract
The present invention relates to a process for preparing monomethylhydrazine by methylating hydrazine or hydrazinium hydrochloride or hydrazinium dihydrochloride with methyl chloride and/or a methano/HCl mixture, characterized in that the reaction mixture formed in the methylation is reacted with an organic base from the group of the alkylamines or alkanolamines and monomethylhydrazine is removed by distillation from the reaction mixture in a low boiler fraction and the low boiler fraction is optionally subjected to a further distillation.
Claims7
Process for preparing monomethlyhydrazine from the methylation of hydrazine or hydrazinium hydrochloride or hydrazinium dihydrochloride with methyl chloride and/or a methanol/HCl mixture, characterized in that the reaction mixture formed in the methylation is reacted with an organic base at a pKa greater than 7.0 and a boiling point above 120° C., and monomethylhydrazine is removed by distillation from the reaction mixture in a low boiler fraction and this low boiler fraction is optionally subjected to a further distillation.
Dependencies are inferred from the claim text.