The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 2023
Filed:
Oct. 31, 2019
Eastman Chemical Company, Kingsport, TN (US);
Robert Jacks Sharpe, Johnson City, TN (US);
Scott Donald Barnicki, Kingsport, TN (US);
Manik Lal Saha, Longview, TX (US);
Kenneth Wayne Hampton, Jr., Gilmer, TX (US);
Damon Ray Billodeaux, Longview, TX (US);
Robert Thomas Hembre, Johnson City, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
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.