Efficient Polymerization Inhibition Systems for Acrylic Acid Distillation: Vapor-Phase Inhibitors

Autor:	Kishore K. Kar, Jaroslav Mosnáček, Richard S. Harner, Michael D. Cloeter, Stanley O. Fruchey, Renaud Nicolaÿ, Krzysztof Matyjaszewski
Rok vydání:	2012
Předmět:	Nitroso Compounds General Chemical Engineering Vapor phase Liquid phase General Chemistry Industrial and Manufacturing Engineering law.invention Nitrosobenzene chemistry.chemical_compound chemistry Polymerization law Organic chemistry Distillation Acrylic acid
Zdroj:	Industrial & Engineering Chemistry Research. 51:4467-4471
ISSN:	1520-5045 0888-5885
Popis:	Nitroso compounds, such as 2-methyl-2-nitrosopropane, nitrosobenzene, and 4-nitrosophenol, were tested as volatile inhibitors for vapor-phase inhibition of acrylic acid polymerization during its reflux at 113 °C under reduced pressure. The experimental parameters were set to mimic the conditions employed for the industrial distillation of acrylic acid. Nitrosobenzene was found to be the most efficient vapor-phase inhibitor for the distillation of acrylic acid. The inhibition time was also found to be dependent on the pressure used for the experiments. Decreasing the pressure from 110 to 85 mbar resulted in an almost 2-fold increase in the inhibition time. The combination of nitrosobenzene with a liquid-phase inhibitor, namely, 4-hydroxy-2,2,6,6-tetramethylpiperidine 1-oxyl, significantly improved the efficiency of vapor-phase inhibition by decreasing the consumption of nitrosobenzene in the liquid phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7b5c647afbaf9fb9a9bd2cd93c2dbb6b https://doi.org/10.1021/ie201709y Zobrazit plný text záznamu