This whitepaper from DWC Innovations examines how dividing wall column (DWC) technology can upgrade naphtha block performance in refineries. Full-range naphtha — a broad hydrocarbon cut representing 15-30% of crude by weight — is split into fractions feeding isomerization, catalytic reforming, and aromatics units. As refiners chase higher-octane fuel with lower emissions, feed preparation to these downstream units has become a bottleneck. Dividing wall columns replace two conventional towers with a single vessel, cutting capital and footprint by roughly 20-50% while producing three high-purity streams instead of two.
20-50%Lower capex & footprint
3High-purity streams
15-30%Naphtha in crude
3Revamp case studies
Case studies
Three real-world revamps
CASE 01
Preparing feed for isomerization and CCR units
CASE 02
Adding a side-cut for isomerization, CCR and paraxylene units
CASE 03
Targeting a two-cut splitter feeding isomerization and CCR
The whitepaper
Optimize Naphtha Block Using DWC
Read the full technical paper — dividing-wall column revamp strategies, three real-world case studies, and the capacity, purity and CAPEX outcomes.
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Reported outcomes
Capacity increases, reduced benzene precursor loss, better feed quality, and lower revamp costs compared to installing new columns.
