公开(公告)号：US11851392B2

公开(公告)日：2023-12-26

申请号：US17290901

申请日：2019-10-31

Applicant: EASTMAN CHEMICAL COMPANY

Inventor： Robert Jacks Sharpe ,  Scott Donald Barnicki ,  Manik Lal Saha ,  Kenneth Wayne Hampton, Jr. ,  Damon Ray Billodeaux ,  Robert Thomas Hembre

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

CPC classification number: C07C29/15 ,  B01J31/04 ,  C07C45/45

Abstract: 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.