METHOD OF PREPARING PURIFIED MIXTURE OF ALKYLDIMETHYLAMINES Russian patent published in 2003 - IPC

FIELD: industrial organic synthesis. SUBSTANCE: purified mixture of alkyldimethylamines mainly containing tetradecyldimethylamine and/or dodecyldimethylamine, which is starting material for production of quaternary ammonium compounds and can be used for producing disinfecting agents manifesting simultaneously detergent properties. Method is distinguished by that rectification of crude tert-amine mixture is carried out in vacuum or at atmospheric pressure and at temperature on top plate and in vat of rectification column ranging from about 80 to about 130 and from about 130 to about 310 C, respectively. Rectification temperature generally ranges from 0.1 to 1.0 kPa. Method enables regulation of dodecyldimethylamine-to-tetradecyldimethylamine ratio in resulting mixture by varying amount of phlegm, which can be, if needed, fed for reflux in rectification column in amounts up to 100%. EFFECT: reduced number of operations in the purification process allowing reduction of power consumption and price of final product. 4 cl, 1 tbl