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Propylene is a colorless, gaseous hydrocarbon. It is a petrochemical feedstock used primarily in the manufacture of plastics via polypropylene or cumene. It is also used to produce propylene oxide, acrylic acid and isopropanol. Marathon Petroleum Company LP (MPC) produces three grades of propylene at its refineries: refinery grade (RGP), chemical grade (CGP), and polymer grade (PGP), varying in purity from approximately 65 percent propylene to more than 99 percent propylene.

Production Information
MPC generates saleable propylene from all of its refineries. Propylene is produced in the refinery cracking units that upgrade heavier feedstocks into light products, such as gasoline and distillate. Cokers also create a propylene byproduct. See the specific locations and grades produced at each refinery in the table below.

MPC transports propylene from the refineries via pipeline, rail and transport truck. It must be stored and transported in pressurized containers to keep the product in a liquid state. Since all transportation modes are not available at all facilities, the table below illustrates MPC's current logistical capabilities.

Facility Grades Produced Transportation Modes Available
Canton refinery (Ohio)        RGP Rail
Catlettsburg refinery (Kentucky) RGP Rail
Detroit refinery (Michigan) CGP Rail, Transport Truck
Garyville refinery (Louisiana) RGP Transport Truck, Rail, Pipeline
Garyville refinery (Louisiana) PGP Rail
Galveston Bay refinery (Texas) RGP Pipeline
Robinson refinery (Illinois) RGP Rail
Galveston Bay refinery (Texas) CGP Pipeline

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Propylene Detail 1

Propylene Detail 2