Successful Revamp of Naphtha Splitter Column to Dual DWC at MRPL, India

DWC-Prime Technology converts the CDU-2 naphtha splitter at MRPL, India into a state-of-the-art dividing wall column — achieved with no change in reboiler duty.

DWC Innovations LLC is pleased to announce the successful completion and commissioning of a revamp project involving conversion of the existing Naphtha Splitter column in the CDU-2 unit at Mangalore Refinery and Petrochemicals Limited (MRPL), India, into a state-of-the-art Dividing Wall Column utilizing its proprietary DWC-Prime Technology.

The primary objectives of the revamp included enhanced operational flexibility, a stable and robust process control scheme, improved separation efficiency and product specifications, and achieving these objectives with no change in reboiler duty.

The revamped unit successfully completed the Performance Guarantee Test Run in April 2026, meeting all project goals established for the project. The upgraded column was re-integrated with its auxiliary equipment with minimum changes to piping, delivering an optimized unit capable of producing higher-purity products and sharper separations across light, medium, and heavy naphtha streams.

• Licensing of proprietary DWC-Prime Technology
• Basic and detailed engineering of the NSU-2 unit
• Supply and installation of proprietary tower internals
• Modification of the Naphtha Splitter Column and its associated piping
• On-site supervision during the turnaround period