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This document provides an overview of refinery processes, beginning with introductions to hydrocarbons, crude oil, and gas processing. It describes the main refinery units including the crude unit, hydrotreating unit to remove impurities and increase hydrogen content, fluid catalytic cracking (FCC) unit to convert gas oil to gasoline and lighter products, delayed coker to convert residual oils into lighter products, and MEROX unit to remove mercury from natural gas streams.


























