US 6,982,352 B2
Process for preparing N-methyldialkylamines from secondary dialkylamines and formaldehyde
Peter Lappe, Dinslaken (Germany); and Helmut Springer, Dinslaken (Germany)
Assigned to Celanese Chemicals Europe GmbH, (Germany)
Filed on Mar. 19, 2004, as Appl. No. 10/804,747.
Claims priority of application No. 103 16 375 (DE), filed on Apr. 10, 2003.
Prior Publication US 2004/0204611 A1, Oct. 14, 2004
Int. Cl. C07C 209/28 (2006.01); C07C 211/35 (2006.01); C07C 211/08 (2006.01); C07C 211/21 (2006.01); C07C 211/27 (2006.01)
U.S. Cl. 564—471 7 Claims
 
1. A process for preparing N-methyldialkylamines from secondary dialkylamines or diaryalkylamines and formaldehyde at a temperature of from 100 to 200° C., which comprises using from 1.5 to 3 mol of formaldehyde per mole of secondary dialkylamine, or diaryalkylamines, degassing the resulting reaction product, removing the aqueous phase and distilling the organic phase.