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This post was last edited by 103388716 on 2017-5-22 at 22:47. 1. Oil refining production units: Crude oil separation units, units for converting heavy oils into lighter ones, units for modifying and refining oils, oil blending units, gas processing units, hydrogen production units, and units for producing chemical products. 2. Auxiliary facilities: Automatic control systems, power supply systems, water supply systems, steam supply systems, gas supply systems, storage and transportation systems, and waste treatment systems. Catalytic cracking: This process uses heavier crude oils as raw material, with aluminum silicate or aluminum silicate combined with molecular sieves as catalysts, to produce lightweight products such as gasoline, diesel, and liquefied gas. Generally, vacuum distillate oil, deasphalted oil, and coker wax oil are used as raw materials. Catalytic reforming: A reforming process that uses naphtha as raw material, and is carried out in the presence of a catalyst and hydrogen, to produce aromatics or high-octane gasoline. Hydrorefining: Various crude or processed oils are subjected to hydrogenation to remove impurities such as sulfur, nitrogen, oxygen, and metals; this process is collectively referred to as hydrorefining. Hydrocracking: A secondary processing method in which, under certain temperatures and hydrogen pressures and with the action of catalysts, heavy feed oils undergo reactions such as cracking, hydrogenation, and isomerization to produce various light oil products or lubricant materials.