(4c) Dividing Wall Column for Upgrading Naphtha Pool
Southwest Process Technology Conference
Thursday, October 1, 2020 - 2:30pm to 2:55pm
The refinery has an existing a naphtha splitter followed by a Depentanizer column. The light Naphtha was separated into to a mix of C5 cut and C6+ naphtha. The new business objective required to produce three products: iC5, C5s & C6+ naphtha.
The paper explores the common distillation sequences to meet the new design objectives:
- Install a new deisopentanizer downstream of the existing depentanizer
- Revamp the existing depentanizer to a conventional side cut column
- Revamp the existing depentanizer to a dividing wall column.
The pros and cons in terms of CAPEX and OPEX are discussed for the each of the revamp scenarios.