Patent ID: 6924378

Claim:
A method for the production of aziridine, which comprises a reaction step for obtaining a reaction gas containing aziridine by the gas phase intramolecular dehydration of an alkanolamine, a collecting step for obtaining a collection liquid containing aziridine by causing the reaction gas to contact a collecting agent and/or a condensation step for obtaining a condensed liquid containing aziridine by cooling the reaction gas, a purifying step for obtaining purified aziridine by introducing the collection liquid and/or the condensed liquid into a distillation column and subjecting the collection liquid and/or the condensed liquid to vacuum distillation therein, and a recovering step for recovering the alkanolamine by introducing the bottom liquid in the distillation column at the purifying step into a distillation column and subjecting the bottom liquid to vacuum distillation therein, and the decompression at the purifying step and the decompression at the recovering step are carried out with mutually different decompression systems.