The role of recirculation loop on the risk of ethoxylation processes |
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| Institution: | 1. Istituto di Ricerche sulla Combustione, CNR, Via Diocleziano 328, 80124 Napoli, Italy;2. Dipartimento di Chimica, Università degli Studi di Napoli Federico II, 80126 Napoli, Italy;1. University of Naples “Federico II” Department of Chemical Sciences, Via Cinthia, 80126 Naples, Italy;2. Consorzio Interuniversitario di Reattività Chimica e Catalisi (CIRCC), Italy;1. Åbo Akademi University, Faculty of Science and Engineering, Johan Gadolin Process Chemistry Centre, Laboratory of Industrial Chemistry and Reaction Engineering, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland;2. University of Naples Federico II, Chemical Sciences Department, Via Cintia 4, IT-80126 Naples, Italy;3. Åbo Akademi University, Molecular Process and Materials Technology, Biskopsgatan 8, 20500 Turku, Finland;1. University of Naples “Federico II”, Dipartimento di Scienze Chimiche, Complesso Universitario Monte S. Angelo, Via Cintia 4,IT, 80126 Naples, Italy;2. Ecole Polytechnique Fédérale de Lausanne, GGRC-EPFL, Lausanne CH-1015, Switzerland;1. Laboratory for Chemical Technology, Ghent University, Technologiepark, 914, B-9052 Ghent, Belgium;2. SINTEF Materials and Chemistry, Kinetics and Catalysis Research Team, N-7465 Trondheim, Norway;3. SINTEF Materials and Chemistry, Materials Physics Research Team, N-7465 Trondheim, Norway;4. Department of Solid State Sciences, Ghent University, Krijgslaan 281/S1, B-9000 Ghent, Belgium;5. Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281/S3, B-9000 Ghent, Belgium;1. Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology, Thiruvalluvar University, Vellore, 632115, Tamil Nadu, India;2. Department of Botany and Microbiology, College of Science King Saud University, Riyadh, 11451, Saudi Arabia;3. Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, South Korea |
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| Abstract: | Alkoxylation is performed in industry for producing non-ionic surfactants and polyethylene/polypropylene glycols. To this end, the most common type of reactor consists of a simple liquid-stirred reactor equipped sometimes with an external circulation loop to increase the reactor heat exchange capacity. More advanced chemical processes are now performed in Semi-Batch Venturi Loop reactors or in Spray Tower Loop Reactors, where the liquid phase is dispersed into the gaseous phase by means of recirculation loop. The three different reactor types used in the manufacture of ethoxylated products have been compared in terms of efficiency. However, few indications have been given in terms of accidental consequences, whose evaluation is mandatory when sound risk assessment of chemical processes is carried out. In this paper, the added risks due to the presence of the recirculation loop have been assessed by varying the operating conditions, either in terms of temperature or partial pressure of ethylene oxide (EO). The aim is, therefore, to rank the different technologies. |
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