Baytown refinery

Lubricant base stock hydrofinishing (MAXSAT™ catalyst)  

ExxonMobil’s MAXSAT™ is a proprietary, state-of-the-art aromatic saturation catalyst that integrates well with lubes or fuels hydrocrackers or as a hydrofinishing step with hydrodewaxing technologies. Refiners use MAXSAT as a hydrofinishing catalyst to enhance the color, oxidative and thermal stability of the base stock.

Key benefits

  • oustanding performance icon

    • High yield for maximum productivity
    • Minimal cracking to fuels

  • Low Investment

    • Short start-up for fast investment recovery
    • Stable operation with long cycle life
    • Process full range of viscosity grades to maximize value

  • Excellent base stocks

    • Produces base stocks with outstanding color and stability

Exceptional base stock products  

MAXSAT is a noble-metal hydrofinishing catalyst with a proprietary support that is more polar tolerant and cost-effective than existing hydrofinishing catalysts. Due to its high sulfur tolerance and exceptional saturation capability, MAXSAT produces base stocks with excellent color and stability.

DWO saturates graph


MAXSAT process  

MAXSAT base stocks process chart

MAXSAT™ services include:  

  • Initial non-confidential consultations
  • Development of licensing proposal
  • Basic engineering package, including basic design specification and operating guide
  • Engineering support during FEED and EPC stages
  • Technology transfer, training, catalyst loading and startup support
  • Performance estimates for catalyst refills

MAXSAT hydrofinishing  

MAXSAT removes polynuclear aromatics (PNAs) and trace amounts of olefins. PNA equilibrium is controlled by reaction temperature and pressure. MAXSAT is highly efficient at aromatic saturation even in the presence of moderate amounts of polars.

Proven performance  

Commercially proven MAXSAT technology provides:

  • High saturation activity
  • High sulfur tolerance
  • Low density

MAXSAT’s low density helps limit catalyst cost by minimizing the total weight of hydrogenation metal needed. As a drop-in catalyst, MAXSAT has demonstrated excellent performance when integrated with other processing equipment.

Featured resources

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  • ExxonMobil Chemical Library icon

    Lubricant base stock dewaxing – MSDW™ catalyst – fact sheet

    Learn how MSDW™ selective dewaxing technology delivers outstanding activity, yield, selectivity, run length and durability, improving base stock cold-flow properties and converting wax to high VI lubricant.

    Read more
  • ExxonMobil Chemical Library icon

    Lube dewaxing – MWI™ catalyst – fact sheet

    Find out how refiners can use MWI™ wax isomerization technology to convert slack wax or other highly paraffinic streams into very high value Group III+ base stocks.

    Read more
  • ExxonMobil Chemical play button icon

    A Particle of Difference

    How ExxonMobil Catalysts and Technology Licensing solves shared challenges through expertise, specialty catalysts, technology licensing and collaboration.

    Watch the video
  • ExxonMobil Chemical Library icon

    ExxonMobil Catalysts and Technology Licensing – summary of technologies offered

    Learn about the cutting-edge, proprietary catalysts and advantaged process technologies that ExxonMobil provides for refining, gas and chemical needs.

    Read more
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