Alkylation

Alkylation overview (HF unit)

Overview

Alkylation inferences

Alkylation combines isobutane with olefinic butane to produce  iso-octane, a MOGAS blending component.  This unit is characterized by – 
  • High stoichiometric ratio (about 10:1) of IC4 to olefins in the reactor
  • Contaminants such as propane, normal butane and pentane should be low in concentration
  • These contaminants are separated from IC4 by distillation and purged, whereas IC4 is an ingredient and IC4 loss is to be minimized. 
While the distillation columns are complex, especially the isostripper, our GDS methodology is still suitable for controlling the purge of non-ingredients. 

IC4 and C5 in NC4 side draw example

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Isostripper top recycle C3 example

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Isostripper top recycle NC4 example

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Alkylate RVP example

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DeC3 top IC4 and bottom C3 example

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