--- title: Case Study Reboiler Online Cleaning with Rezyd-HP-3 description: Online Reboiler Cleaning in SDA Unit Restores Performance by 49% Using Rezyd-HP --- [![zymeflow_logo_white.svg fill](https://info.zymeflow.com/hubfs/Zymeflow-2024/Images/zymeflow_logo_white.svg%20fill.svg) ](https://www.zymeflow.com/) # Maximizing Heat Transfer Without Shutdown Online Reboiler Cleaning in SDA Unit Restores Performance by 49% Using Rezyd-HP When a major U.S. refinery experienced severe shell-side fouling in a reboiler on its solvent deasphalting (SDA) unit, traditional cleaning methods would have required a full shutdown, an expensive and time-consuming option. ZymeFlow’s engineered online cleaning solution using Rezyd-HP restored exchanger duty from 35% to 52% of design capacity, increasing steam flow by 500 lb/hr and extending runtime. This case study highlights how Rezyd-HP’s high-performance chemistry delivers safe, effective fouling removal without interrupting operations. **Get the Full Case Study** Ready to dive into the details? Fill out the form below to download the full case study and discover how ZymeFlow can benefit your facility. [![zymeflow_logo_white.svg fill](https://info.zymeflow.com/hubfs/Zymeflow-2024/Images/zymeflow_logo_white.svg%20fill.svg) ](https://www.zymeflow.com/) © 2026 ALL RIGHTS RESERVED.