IsoTherming® Hydroprocessing

IsoTherming® Hydroprocessing Technology

Economical and flexible, this breakthrough hydroprocessing technology uses a novel liquid-full reaction system.

IsoTherming® hydroprocessing technology meets ultra-low-sulfur specifications through hydrotreating or mild hydrocracking to reach more global markets, while lowering capital and operating costs. This innovative technology provides the hydrogen necessary for reactions through a unique saturated liquid recycle stream. Our technology eliminates the need for a recycle gas compressor and associated equipment, and makes the flow through the reactor a single, liquid phase. This reduces capital costs and lowers annual operating costs, while meeting ultra-low-sulfur specifications in motor fuels. The hydrotreated liquid recycle stream also acts as a heat sink, resulting in less unwanted cracking, less coking, reduced light-ends make, reduced maintenance, and increased catalyst life.

By removing hydrogen dissolution from the reactor, the IsoTherming® hydroprocessing technology also removes any mass transfer limitation from your overall reactions, kinetically controlling the reaction rate for faster processing. As a result, the reactor can be sized for the hydroprocessing reactions themselves, rather than for dissolving of hydrogen in the reaction mixture.

Commercially Proven Expertise
Since its introduction in 2003, our experts have licensed and installed breakthrough IsoTherming® hydroprocessing technology in 18 commercially operating units worldwide. Our solutions are helping refiners to produce ultra-low-sulfur fuels compatible with the increasingly stringent requirements of many global markets. Thanks to the flexibility of our technology, we can work with you to assess and design a custom-configured solution for your needs, with reduced equipment delivery times. And we offer support that takes you from startup all the way through the life of your plant.

IsoTherming® Hydrotreating Technology
Our unique technology helps petroleum refiners meet low- and ultra-low-sulfur diesel requirements at costs significantly lower than conventional technologies.

IsoTherming® Mild Hydrocracking
Achieve better yields and improved nitrogen removal with breakthrough technology that creates a reactive environment with better control over hydrocracking reactions, when adapted for FCC feedstocks.

IsoTherming® Clean Fuel Technology

Read the DuPont Sustainable Solutions (DSS) brochure on IsoTherming® hydroprocessing technology for cleaner fuel.


  • Clean Technologies Overview Brochure

    Read the DuPont Sustainable Solutions (DSS) Clean Technologies brochure to learn more about our focused technology-based solutions backed by real-world experience.

  • Mild Hydrocracking

    Read the DuPont Sustainable Solutions (DSS) article on the benefits of using IsoTherming® technology for mild hydrocracking.