1. Recovery of acetic acid using esterification of acetic acid with n-octanol in a membrane reactor
- Author
-
Matthäus Siebenhofer, Marlene Kienberger, and Markus Hackl
- Subjects
chemistry.chemical_classification ,Aqueous solution ,Membrane reactor ,Process Chemistry and Technology ,Carboxylic acid ,Extraction (chemistry) ,Homogeneous catalysis ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Heterogeneous catalysis ,01 natural sciences ,Pollution ,0104 chemical sciences ,Catalysis ,Acetic acid ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Chemical Engineering (miscellaneous) ,0210 nano-technology ,Waste Management and Disposal - Abstract
Down-cycle raw material utilization is a need when it comes to the step out of fossil fuel utilization. Carboxylic acid serve as bulk chemicals, and isolation from industrial aqueous process streams is an ongoing research. Therefore acetic acid esterification of an aqueous acid feed using n-octanol in combination with liquid/liquid-extraction with the solvent mixture n-octanol/n-undecane was investigated. Due to emulsion formation when 4-dodecylbenzenesulfonic acid was used as homogeneous catalyst, the reaction was transferred into a membrane reactor. The homogeneous esterification in the membrane reactor is described by phase transfer catalysis. The combination of acetic acid extraction from aqueous mixture combined with heterogeneous catalysis was investigated in the membrane reactor too. Physical extraction and heterogeneous catalysis lead to conversion of acetic acid, while the reactive solvent Tri-n-octylamine inhibited heterogeneous catalysis by Amberlyst®15. The work provides a novel approach for process intensification of liquid/liquid extraction in combination with an esterification reaction using a membrane reactor.
- Published
- 2018
- Full Text
- View/download PDF