Alternative Process

Alternative Process - Review and Screening of Alternative...

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Review and Screening of Alternative Process 1. Propylene Oxide-Styrene Monomer (POSM) Improving conversion and reducing the amount of ethylbenzene that must be separated is the main target for researching alternative routes to styrene. Commercially styrene is also co-produced with propylene oxide in a process known as POSM [2]. First, feed like heavy distillate enters the reactor section 1. Reactor effluent is subsequently worked up in work-up section 2 resulting in an ethene stream and a propene stream. The ethene stream is introduced into ethylbenzene unit 3, optionally with additional ethene from an external source to increase the concentration of reactants so that the equilibrium will shift to the right side, together with benzene stream. The ethylbenzene-containing stream is then lead into oxidation unit 4 where the ethylbenzene is oxidized into ethylbenzene hydroperoxide (EBHP) using pure oxygen at elevated temperature. A small amount of alkali is added to the oxidation mixture in order to improve oxidation rate and selectivity.
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