Chemical Engineering & Technology
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Every month, the Editors select two papers referring to current discussions in the scientific, public and economic communities and in view of the potential for further developments. The papers are freely accessible for one month.
Restabilization of Acrylic Acid
February 09, 2016
Acrylic acid is an important intermediate for the chemical industry. The high polymerization tendency of acrylic acid especially in aqueous mixtures is a desired property for the production of polymers. On the other hand, this property is a problem during storage of acrylic acid because a spontaneous polymerization can set in and the so-called runaway can occur. In case of an emergency, a shortstopping system is therefore needed as a fallback position to immediately terminate the premature polymerization of monomers during storage. Current existing concepts for preventing a runaway rely mostly on operational than on a rational experience. C. A. Pfeifer et al. introduced an experimental setup which offers a rational access to study effective restabilizations. By using a polytropic reactor setup, namely, an isoperibolic reactor, they were able to simulate real-life conditions. This lead to the creation of safety diagrams showing that the amount of shortstopper needed to stop the reaction increases with rising temperature. The diagrams also allow determining the minimum amount of shortstopper required to stabilize the stored acrylic acid, thereby simplifying the follow-up purification of the remaining acid.
C. A. Pfeifer, A. Vizer, H. Vogel
Restabilization of Acrylic Acid in Isoperibolic Reactors
Chem. Eng. Technol. 2016, 39 (2), 331–334.