Original title: Způsob přípravy N - methylmorfolinoxidu
Title in English: A method for preparation of N-methylmorpholine-N-oxide…
First author: Prof. Josef Pašek, MSc, DSc
Short abstract:
A method for preparation of N-methylmorpholine-N-oxide solutions having the compound concentrations from 50 to 60 wt% and low nitrosomorpholine content from 100 to 300 ppb trough oxidation of A-methylmorpholine by an aqueous solution of hydrogen peroxide under temperature from 55 to 70°C. The invented method consists in use of the molar ratio of H2O2 : amine falling within 0.4to 0.7, more advantageous from 0.5 to 0.65, while the hydrogen peroxide solution is fed into the amine solution for the period from 2 to 5 hours and then the reaction mixture is left to finish the reaction for 3 to 5 hours. The unreacted N-methylmorpholine in the reaction mixture is removed by vacuum rectification.