Optimization of the Composition of Cobalt Catalyst in the Process of Producing Propylpropionate from Ethylene

• Published in: Journal of Siberian Federal University. Chemistry 2024-07, Vol.17 (3), p.329-338
• Main Authors: Norin, Vladislav V, Galanov, Sergey I, Knyazev, Aleksey S, Kuznetsov, Maxim T, Gil, Tatyana A, Fedotov, Konstantin V, Sulimov, Aleksandr V, Kleymenov, Andrey V
• Format: Article
• Language: Russian
• Subjects: Catalytic activity; Catalytic converters; Composition; Ethylene; Optimization; Pyridines; Triethylamine
• ISSN: 1998-2836; 2313-6049

This paper presents a study aimed at optimizing the composition of a Co2(CO)8: promoter catalytic complex for the ethylene carboalkoxylation reaction in order to maximize the yield and purity of propyl propionate. The following promoters were used: pyridine, dimethylaniline, triethylamine and dimethylaminopyridinc. It was found that pyridine and dimcthylaminopyridine have the highest catalytic activity. The use of these promoters makes it possible to achieve ethylene conversion of up to 97 % with selectivity for the target product equal to 95 % for pyridine and 90 % for dimethylaminopyridine. It was also found that for the catalytic system Co2(CO)8: pyridine the addition of hydrogen to the reaction stock leads to an increase in the target product yield, while for the catalytic system Co2(CO)8: dimethylaminopyridine, this activity leads to the opposite effect. In addition, the optimal ratio of the catalytic system Co2(CO)8: dimethylaminopyridine was determined to be 14:1. This ratio allows achieving a conversion of 94 % and selectivity for propyl propionate of 93 %.