公开(公告)号：US20210380508A1

公开(公告)日：2021-12-09

申请号：US17290901

申请日：2019-10-31

申请人： EASTMAN CHEMICAL COMPANY

发明人： ROBERT JACKS SHARPE ,  SCOTT DONALD BARNICKI ,  MANIK LAL SAHA ,  KENNETH WAYNE HAMPTON, Jr. ,  DAMON RAY BILLODEAUX ,  ROBERT THOMAS HEMBRE

IPC分类号： C07C29/15 ,  C07C45/45 ,  B01J31/04

摘要： An efficient process useful for the self-condensation of aliphatic aldehydes is provided, catalyzed by dialkylammonium carboxylate salts. In particular, the invention provides a facile method for the preparation of 2-ethyl hexenal via the self-condensation of butyraldehyde using various dialkylammonium carboxylates, e.g., diisopropylammonium acetate or dimethylammonium acetate, as catalyst. Additionally, residual nitrogen arising from the catalyst can be reduced to −100 ppm levels in the product via a simple washing procedure. The invention provides a process for preparing alkenals under conditions which limit the formation of undesired impurities and high-boiling oligomeric substances.