The Consumption of Oxygen and p-Methoxyphenol in Acrylic Acid - Kinetics and Modeling

作者：Brand Raphael H; Hartwig A; Opitz B; Pfeifer C; Drochner A; Vogel G Herbert^*

来源：Macromolecular Reaction Engineering, 2011, 5(5-6): 212-222.

DOI：10.1002/mren.201000057

• acrylic acid
• acrylic monomers
• oxygen
• p-methoxyphenol
• polymerization
• stabilization

For a safe storage and handling of acrylic acid (AA), a lot of knowledge is necessary. In the present work, investigations were made in order to describe the stabilization processes during the inhibition period (IP) of AA more exactly. The oxygen and p-methoxyphenol consumption was determined for AA at 70 and 80 degrees C in an enhanced parameter range and simulated with a kinetic model, using the software Presto Kinetics (R). In the simulation accelerated stabilizer consumptions at 80 degrees C could be confirmed. The known stabilization mechanism must be enhanced with autocatalytic steps, which lead to an accelerated stabilizer consumption. Furthermore, the stability of AA was examined as a function of the dissolved oxygen mass fraction and the temperature in isoperibolic reactors. The IP follows an Arrhenius behavior; therefore, an extrapolation from higher reaction temperatures to storage conditions is possible. These measurements also confirm the nonlinear stabilizer consumption during the IP at temperatures over 75 degrees C.

• 出版日期2011-6-6