Inventors:
David L. Childress - Angleton TX
William V. Hayes - Clute TX
Richard L. Poppe - Clute TX
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C07C 4720
C07C 4722
Abstract:
A method of preparing acrolein and methacrolein by oxidation of propylene and isobutylene over a new improved catalyst providing conversions and yields, each greater than 90% in a single-pass reactor. The improved catalyst contains within certain prescribed proportions the oxides of cobalt, iron, bismuth, molybdenum, potassium, and optionally silicon. The metals have atomic ratios of Co. sub. 3-10 Fe. sub. 5-3. 0 Bi. sub. 5-3. 0 Mo. sub. 15 K. sub. 01-0. 5 Si. sub. 5-3. 0 and are present in the form of oxides as pellets, spheres, or on a support. With a recycle system, a conversion of the olefin greater than 99% and yield to the aldehyde of greater than 95% are possible.