An LPG plant in Damietta, Egypt, operated by El-Wastani Petroleum Co. (WASCO), contains a turboexpander LPG recovery unit. Due to the increased demand for ethane and LPG in Egypt, a retrofit was recommended for the WASCO plant to increase LPG recovery and produce ethane as a new product. A conceptual design is presented here, along with a preliminary economic study for retrofitting the plant. The retrofit study was based on two proprietary ethane-recovery (ER) processes and was modeled on commercial process simulation software.* The results of the study showed that the ultra-high ER (UHER) process—a modification of an established ER process—gave a better return on investment and lower payback time, and was more attractive for implementation.
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