Comparison of DMTO olefin separation technologies
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There are several typical olefin separation technologies for DMTO, and it seems that the plants installed in China recently make use of pre-deethanization and pre-depropanization separation technologies quite often. Could the experts help compare these two technologies?
Pre-depropanization is primarily a Lummus technology that involves washing with propane; the propylene tower is large and consumes a lot of energy. Pre-deethanization is primarily a technology developed by Whiting and SEI; their patents provide details on this.