KETONIZATION OF ETHYL ACETATE OVER Zn-Cr OXIDES CATALYST

• Published in: Rigas Tehniskas Universitates Zinatniskie Raksti Materiālzinātne un lietišk̦ā k̦īmija Vol. 18; pp. 64 - 68
• Main Authors: Stonkus, V, Leite, L, Edolfa, K, Fleisers, M, Liepina, I, Dalberga, I, Krumina, A, Rasmane, Dz, Ilieva, L
• Format: Journal Article
• Language: English; Latvian
• Published: 01.01.2008
• ISSN: 1407-7353

The ketonization of ethyl acetate over a catalyst of zinc chromite type at 300-400 deg C in the presence of water vapour has been investigated. It was found that the maximum degree of ketonization (91.9 mol%) was achieved at 350 deg C temperature while the ethyl acetate conversion was 100%. The composition of gaseous reaction products was also studied; H2 and CO2 were found to be the main components. The content of CO, CH4 and C2H4 significantly rises at 375-400 deg C, when the importance of molecule destruction increases. Degrees of ketonization of the corresponding ester, carboxylic acid, aldehyde and alcohol are compared. It is found that the ketonization of ethyl acetate proceeds more selectively than in the cases of corresponding alcohol and aldehyde and, in this respect, only slightly falls behind ketonization of acetic acid. It is concluded that ketonization of esters over chromite type catalysts is a perspective method for producing ketones.