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Complexation equilibria studies of alkyl formate hydrolysis in the presence of 1-butylimidazole
Umeå University, Faculty of Science and Technology, Department of Chemistry. Åbo Akademi, Johan Gadolin Process Chemistry Centre, Laboratory of Industrial Chemistry and Reaction Engineering, Åbo/Turku, Finland.
2017 (English)In: Thermochimica Acta, ISSN 0040-6031, E-ISSN 1872-762X, Vol. 652, 62-68 p.Article in journal (Refereed) Published
Abstract [en]

Formic acid production by ethyl or methyl formate hydrolysis was improved using 1-butylimidazole as a complexing agent. The chemical process involved both hydrolysis and complexation steps. The complexation equilibria were investigated by deriving theoretical equations using the equilibrium constant of the hydrolysis step, the apparent formation constant of the complexation process and the initial concentration of the complexing agent. The treatment of the experimental results within the experimental domain indicated that an equimolar amount of the acid and the base did not lead to the complex formation. Experimental observation suggested that the derived equation could be simplified by assuming that the stoichiometric coefficient of the complexing agent was 0.5. The apparent reaction enthalpy obtained from this equation was compared to the experimental one using a Tian-Calvet calorimeter and a good agreement was found between them. FTIR spectroscopy was used to confirm the existence of the complex between formic acid and 1-butylimidazole.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 652, 62-68 p.
Keyword [en]
Alkyl formate, 1-Butylimidazole, Hydrolysis-complexation process, Equilibria, Complexing agent, Calorimetry
National Category
Analytical Chemistry Physical Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-134987DOI: 10.1016/j.tca.2017.03.012ISI: 000403861000008OAI: oai:DiVA.org:umu-134987DiVA: diva2:1095634
Available from: 2017-05-15 Created: 2017-05-15 Last updated: 2017-07-19Bibliographically approved

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Mikkola, Jyri-Pekka
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