- Advanced Silicon Materials
- Amerada-Hess
- Apache
- Akzo Nobel
- Sunoco Refining
- Palisades Nuclear
- Bismarck College
- BP
- ChevronTexaco
- ChevronPhillips
- Citgo
- College of the Mainland
- ConocoPhillips
- DuPont (worldwide)
- Eastman Chemicals
- Elf-Atochem
- Firestone
- Enterprise Products
- Solvay Polymers
- Navajo Refining
- DAK Americas
- Tesoro
- ERG Petroli (Italy)
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- DuPont Singapore
- ExxonMobil
- Farmland Industries
- Goodyear
- Koch
- Shell U.K.
- Kay Chemicals
- Huntsman Chemicals
- Lyondell Petrochemical
- Michigan Tech. University
- Basell
- Nova Chemicals
- Occidental
- Rhodia Inc.
- Rohm & Haas
- Saudi Petrochemical
- Shell
- EQUATE ( Kuwait )
- OPTIMAL ( Malaysia )
- Petronas
- Cytec
- Alliant Tech Systems
- Florida Power and Light
- Valero
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