How is equivalent conversion done for ethylene oxide and ethylene glycol?
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How is equivalent conversion done for EO/EG in chemical plants? I saw one where the value is 1.25, meaning the epoxy equivalent is 1.25 for ethylene glycol. Where does this coefficient come from? Seeking advice!
“The concept of “equivalent” needs to be converted using molar coefficients and molecular weights. Different EO/EG unit products have different structural configurations, and thus their equivalent coefficients vary. Equivalent ethylene oxide EOE(t) = (MEG(t)/62.05 + 2DEG(t)/106.12 + 3TEG(t)/150.18) * 44.05 + EO(t). Equivalent ethylene glycol MEG(t) = (EO(t)/44.05 + 2DEG(t)/106.12 + 3TEG(t)/150.18) * 62.05 + MEG(t)
It is calculated based on the amount of ethylene oxide produced at the reactor outlet and the output of MEG product; this is the most accurate method, as theoretical values always have deviations.