June 2018

Special Focus: Process Optimization

Remove carbonyls from gaseous hydrocarbon streams for ethylene plant service

Within the hydrocarbon processing industry (HPI), particularly the petrochemical sector, there remains an irritating series of reactions associated with acid gas removal (AGR) using dilute caustic soda—namely, aldol condensation reactions and their respective products.

Gondolfe J., Kurukchi S., Janus Technology Solutions LLC

Within the hydrocarbon processing industry (HPI), particularly the petrochemical sector, there remains an irritating series of reactions associated with acid gas removal (AGR) using dilute caustic soda—namely, aldol condensation reactions and their respective products. These reaction products cause fouling effects within the AGR itself and, perhaps more importantly, subsequent treatment of the spent solution from the AGR. It is well understood that the speciation of these highly reactive compounds can be classified as carbonyls. Reactions of carbonyls are catalyzed in the presence of free caustic in an aqueous solution to produce aldol condensation products. A method to pretreat these carbo

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