Isopropyl alcohol (IPA) is industrially produced either through direct or indirect hydration of propylene in excess water.  The IPA must be concentrated to 99 wt% or more before shipment.  In IPA aqueous solution systems, there is an azeotrope point at 87 wt% IPA, where it is impossible to obtain further concentrated IPA by ordinary distillation.  Therefore, two specific towers are being developed to further concentrate and improve the conventional seperation process.

Dehydration of isopropyl alcohol-water mixtures with zeolite composite membranes for introducing an energy conservation process

243rd National Meeting (2012)

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