STEVIE GRAND / SCIENCE PHOTO LIBRARY STEVIE GRAND / SCIENCE PHOTO LIBRARY
Part of an oil refinery producing petrol, natural gas and other oil derivatives. The refining of oil is a very complex process involving desalting, fractional distillation to separate the crude oil into grades, catalytic cracking of the heavier hydrocarbon constituents, plus many other processes. The plant where this photograph was taken is part of the Sun Refinery and Marketing Company, Oregan, USA.
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