Gas-Phase Oxidation of a Propane–Propylene Mixture by Nitrous Oxide

The present study focuses on a new method for obtaining C2–C3 carbonyl compounds (ketones and aldehydes) by the gas-phase selective oxidation of a propane–propylene mixture using nitrous oxide (N2O). The oxidation is carried out without catalyst in the temperature range of 623–773 K at elevated pres...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2020-08, Vol.59 (31), p.14157-14162
Main Authors: Dubkov, Konstantin A, Parfenov, Mikhail V, Kharitonov, Alexandr S
Format: Article
Language:English
Subjects:
General Research
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Summary:The present study focuses on a new method for obtaining C2–C3 carbonyl compounds (ketones and aldehydes) by the gas-phase selective oxidation of a propane–propylene mixture using nitrous oxide (N2O). The oxidation is carried out without catalyst in the temperature range of 623–773 K at elevated pressure. The obtained results reveal that only propylene in the propane–propylene mixture reacts with nitrous oxide. The reaction proceeds by the nonradical mechanism involving the 1,3-dipolar cycloaddition of N2O to the CC double bond of olefin. The main reaction products are acetone, propanal, and acetaldehyde. At 723 K and a pressure of 0.7 MPa, the total selectivity to these products amounts to 74.6%, the N2O conversion attains 74.5%, and the propylene conversion is 12.5%. An important feature of the reaction is the additional formation of methylcyclopropane with a selectivity of ca. 6%.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.0c02271