Proof · Results
Dividing Wall Column Case Studies
Real dividing wall column projects — the challenge, what we engineered, and the measured results in commercial operation.
★ Featured case study
A new high-value hexane product from an isomerization unit
CPCL refinery, Manali, Chennai, India · An existing deisohexanizer revamped to a Dual DWC now yields food/pharma-grade hexane alongside light and heavy isomerate — more feed processed at unchanged RON, with no reactor modification. In operation.
New
food/pharma-grade hexane
+8–15%
more feed, no reactor change
RON
unchanged
7 → 4
columns
~40%
less plot space
~4 mo
payback
No room to grow — a seven-column train re-engineered into four
Acetone-derivatives complex, India · A full conventional distillation train replaced by a network of DWC columns — 7 columns into 4, in operation
Read case study →+40%
capacity
$3M
CAPEX
0
new columns
Columns limiting throughput? Excess capacity from a naphtha-splitter revamp
BPCL, Mumbai refinery · Naphtha-splitting section revamped to a DWC — more capacity and sharper cuts within the existing shell
Read case study →▶ Watch video
<1 ppm
CS₂ in naphtha
New
premium-gasoline cut
0
new columns
Meeting new CS₂ limits in petrochemical naphtha
Refinery, Southeast Asia · DWC Prime retrofit into an existing depentanizer takes petrochemical naphtha below 1 ppm CS₂, plus a premium-gasoline stream — in operation
Read case study →▶ Watch video
5
lube grades
3 → 1
columns
½
equipment count
Five lube base-oil grades from a single column
BPCL, Mumbai refinery · A three-column lube base-stock train consolidated into one Dual DWC — five grades, in operation
Read case study →3 cuts
light · med · heavy
Turnkey
feasibility→start-up
0
added reboiler energy
Sharper naphtha cuts to debottleneck CCR & ISOM — no new columns, no extra duty
MRPL, Mangalore, India · Naphtha splitter revamped to a Dual DWC — sharper cuts with no change in reboiler duty, unblocking the downstream CCR & ISOM units
Read case study →More case studies coming soon.
