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Mcgyan® Process

Here is how it works: The process is termed the Mcgyan® process after the names of the inventors (McNeff, Gyberg and Yan). The process performs a catalytic conversion of triglycerides and free fatty acids into fatty acid methyl esters (FAMES); in other words into biodiesel. In addition to the environmental advantages of producing a biofuel that replaces conventional fossil fuels (fossil fuels have detrimental effects on the environment since they release sequestered carbon compounds and other pollutants into the atmosphere, whereas bio-based fuels such as biodiesel are more environmentally friendly since their use recycles carbon through renewable biomass and because they burn cleaner than petroleum fuels), this new process offers several advantages over current biodiesel production methods. 

The Mcgyan® Process
A Simple Continuous Reactor
Mcgyan´┐Ż Reactor

A general operational schematic of the Mcgyan® reactor is depicted above. Oil or tallow feedstocks and alcohol are converted into biodiesel. Once through the reactor, the excess alcohol is separated out and recycled back into the continuous process.

Current State-of-the Art Mcgyan®

Consumes catalyst

Yes No
Uses large amounts of water Yes No
Produces waste products Yes No
Products soap byproducts Yes No
Requires large footprint Yes No
Sensitive to water Yes No
Sensitive to free fatty acid content Yes No
Uses large quantities of strong acids or bases Yes No
Conversion rate Hours Seconds
Converts free fatty acids to biodiesel No Yes
Can use a variety of feedstocks No Yes
Produces glycerol as a major byproduct Yes No
Is a continuous process No Yes

DOMESTICFUEL.com (Joanna Schroeder) Book Review and Interview of Dr. Clayton McNeff

Press Releases (Ever Cat Fuels, LLC)

Poster Presented to Congress


Please contact Steven Rupp for more information regarding this exciting new technology.

Ever Cat Fuels, LLC is operating a 3 million gallon per year demonstration plant incorporating the Mcgyan® biodiesel production process.

Mcgyan® Process | Flexible Feedstock | Process Benefits


617 Pierce Street, Anoka, MN 55303   phone: 763-762-3032   fax: 763-421-2319   email: stevenrupp@mcgyan.com
Copyright 2020. Mcgyan Biodiesel, LLC. All Rights Reserved.