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Kinetics of oligomerization reactions in formaldehyde solutions: NMR experiments up to 373 K and thermodynamically consistent model by Michael Ott; Holger H. Fischer; Michael Maiwald; Klaus Albert; Hans Hasse is a scholarly article available to read on EtoBox.

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Aqueous and methanolic formaldehyde solutions are industrially important complex reacting mixtures in which formaldehyde is bound in a variety of oligomerization products. Reaction kinetics in these systems have to be taken into account in the design of reactors and separation equipment. The present paper reports on studies on reaction kinetics of aqueous and methanolic formaldehyde solutions by quantitative high-resolution on-line 1 H NMR spectroscopy. The experiments were carried out at temperatures up to 373 K partially with a pressurized NMR probe and extend the temperature range in which data were available up to now. The NMR data are used to develop a reaction kinetic model, which is consistent with a physico-chemical thermodynamic equilibrium model, for formaldehyde containing mixtures. This is an important step towards developing thermodynamically consistent process models for reactions and separations with formaldehyde containing mixtures, which take reaction kinetics explicitly into account.

Author

Michael Ott; Holger H. Fischer; Michael Maiwald; Klaus Albert; Hans Hasse

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0255-2701)

Published

2005

Language

EN