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Capture and Recovery of Organic Iodide Species from the Product Stream of a Process for the Iodative Dehydrogenation of Ethane to Ethylene

Author:
Gomez-Osorio, Martin A., van der Sloot, Dennis P., Chewter, Les A., Casciato, Michael J., Horton, Andrew D., Mesters, Carl M. A. M.
Source:
Industrial & engineering chemistry process design and development 2018 v.57 no.42 pp. 13932-13939
ISSN:
1520-5045
Subject:
dehydrogenation, ethane, ethylene, iodides, iodine, organoiodine compounds, process design
Abstract:
A method has been proposed for the capture and recovery of organic iodides produced in the iodative dehydrogenation of ethane to ethylene. Bench-scale experiments have identified ethyl iodide as well as vinyl iodide as the main organic iodide species at levels of several hundred ppmv in the products. The capture, recovery, and recycle of these organic iodides in an absorber–stripper system, using a heavy hydrocarbon absorbing medium, has been modeled and shown to be effective in removing these organic iodide species from the hydrocarbon product stream, reducing concentrations down to around 50 ppbv levels, which enables iodine losses from the process to be maintained at economically acceptable levels.
Agid:
6171074