| 摘要 |
PURPOSE:To obtain the titled compound useful as an industrial product e.g., a drug, agricultural chemical, etc. easily in high selectivity without requiring a complicated separation process, by reacting hydrazine monohydrochloride with methanol in the presence of hydrazine hydrochloride or methyl chloride. CONSTITUTION:Hydrazine monohydrochloride is reacted with mathanol using hydrazine dihydrochloride or methyl chloride as a catalyst at 90-140 deg.C under a pressure of 7-13kg/cm<2>. The prepared reaction product is distilled to remove excess methanol, water, and methyl chloride, hydrozine monohydrochloride is separated as crystal by the solubility difference beteen monomethylhydrazine hydrochloride (MMH hydrochloride) and hydrazine monohydrochloride in the residue, an alkali aqueous solution is added to a methanol solution containing MMH hydrochloride to make MMH free, and the solution is rectified to collect the desired pure compound. The amount of the catalyst used is preferably 5- 20mol% based on hydrazing monohydrochloride.
|
