Alkylation Technology
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STRATCO® alkylation technology


The STRATCO® Alkylation Technology is a sulfuric acid catalyzed process that converts low-value, straight-chain olefins into high-value, branched components called alkylate. Alkylate, with its superior blending properties, is a key component for clean gasoline. 

With over ninety (90) licensed units worldwide, the STRATCO® Alkylation Technology helps refiners safely produce cleaner-burning gasoline with high octane, low RVP, low sulfur, zero aromatics and zero olefins. The latest alkylation innovation from DuPont Clean Technologies, DuPont ConvEXSM HF alkylation conversion technology, offers refineries an efficient option for converting HF alkylation units to a safer, sulfuric acid catalyst.

Products and Services for
Sulfuric Acid Alkylation Units


Whether you’re considering an alkylation unit revamp, or seek to improve unit reliability or optimize unit operation, our team offers continuing support. We provide a comprehensive suite of ongoing reliability, operability and technical services and solutions for the sulfuric acid alkylation industry. 

Reactor Services for STRATCO® Alkylation Technology
Reactor Services for STRATCO® Alkylation Technology
Reactor Services from repairs, part and component replacement to technology upgrades for increased reliability and performance of STRATCO® alkylation units
Technical Services for STRATCO® Alkylation Technology
Technical Services for STRATCO® Alkylation Technology
Technical service support for STRATCO® Alkylation Technology to help refineries to improve alkylation unit performance and optimize profitability
DuPont Operator Training Simulator and Training Solutions for STRATCO® Alkylation
DuPont Operator Training Simulator and Training Solutions for STRATCO® Alkylation
Customized Operator Training Courses and proprietary Training Simulators to optimize operation of STRATCO® Alkylation Technology
STRATCO® Alkylation Technology Process Critical Equipment
STRATCO® Alkylation Technology Process Critical Equipment
Best in class process critical equipment for top unit performance and reliability of STRATCO® alkylation units, from static mixers to mist eliminators

STRATCO® Alkylation Technology
Process Description


The STRATCO® Alkylation Technology combines propylene, butylenes, and/or amylenes, either individually or as a mixture, with isobutane in the presence of a strong sulfuric acid catalyst to produce high-octane, branched chained hydrocarbons for use in motor fuel and aviation gasoline. Olefins and isobutane-rich streams along with a catalyst stream of sulfuric acid are charged to the STRATCO® Contactor™ reactor.

The liquid contents of the Contactor™ reactor are circulated to create an optimized amount of interfacial area between the reacting hydrocarbons and the acid catalyst from the acid settler. This circulation ensures the entire volume of liquid in the Contactor™ reactor is maintained at a uniform temperature. The STRATCO® Alkylation Technology is effluent refrigerated to remove the heat of reaction using a refrigeration section consisting of a compressor and Depropanizer to remove excess propane.

The Contactor™ reactor products pass through a flash drum and are fractionated in a Deisobutanizer. The overhead from the Deisobutanizer combines with the effluent refrigerant recycle to provide isobutane to the reaction zone and to promote the alkylation reaction.  The Deisobutanizer bottoms are further fractionated into normal butane (if applicable) and whole alkylate products. Technology to provide onsite sulfuric acid regeneration (SAR) for the STRATCO® Alkylation Technology is also available by license from DuPont.

Find more details on the Contactor™ Reactor performance benefits in our brochure.

the benefits of
STRATCO® alkylation technology


The STRATCO® Alkylation Technology produces the highest quality alkylate in a flexible and highly reliable process with proven best-in class operations based on decades of supporting data. Find out more about STRATCO® Alkylation Technology innovations by clicking the button below. 

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feed flexibility

Optimized Reaction Zone

  • Proven best in class product quality
  • Lowest CAPEX and OPEX sulfuric acid alkylation technology

Proven Record of Reliability

  • Units built in 1940s are still in operation
  • Commercial alkylation units consistently make a 4‐5 year turnaround plan cycle
  • Unit successfully restarted after being shut down for 20 years

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