US 11,731,940 B2
Process for preparing triacetonamine
Katharina Minke, Essen (DE); and Holger Graskamp, Marl (DE)
Assigned to Evonik Operations GmbH, Essen (DE)
Filed by Evonik Operations GmbH, Essen (DE)
Filed on Apr. 23, 2021, as Appl. No. 17/238,715.
Claims priority of application No. 20173463 (EP), filed on May 7, 2020.
Prior Publication US 2021/0347733 A1, Nov. 11, 2021
Int. Cl. C07D 211/74 (2006.01)
CPC C07D 211/74 (2013.01) 19 Claims
 
1. A process for preparing triacetonamine, the process comprising:
(a) reacting an acetone stream SAc1 and an ammonia stream SAm1 in the presence of a catalyst K1 to give a crude product stream SRP1 comprising triacetonamine and acetone,
(b) performing an at least partial removal by distillation of acetone from SRP1 to obtain a gaseous stream SAc2 comprising acetone,
(c) performing an at least partial absorption of the gaseous stream SAc2 in countercurrent into a liquid acetone stream SAc3 to obtain a liquid acetone stream SAc4,
(d) repeating (a), wherein the acetone stream SAc4 is used as the acetone stream SAc1.