Vacuum Tower Bottoms (VTB) are the left over bottom product of distillation, which will be processed in cokers and used for upgrading into gasoline, diesel and fuel oil.
Crude oil separation is performed in a sequence of distillation towers, with the bottom product from every tower feeding the subsequent from the Petroleum Production Device top down. The resulting merchandise from the distillation tower process range from gases at the highest to very heavy, viscous liquids at the bottom. In all circumstances, these “unfinished product streams require additional processing to turn into useful merchandise.
Vacuum Tower Bottoms or “resid are the heaviest materials in the refinery tower. If allowed to cool to room temperature, Vacuum Tower Bottoms would become a strong. Some Vacuum Tower Bottom product is actually offered to the paving asphalt market as a blend element. The Delayed Coker is used to transform VTB material into extra useful merchandise by using excessive temperature to break the hydrocarbon chains. Vacuum Tower Bottoms are included within the refining process to make off highway fuels, off spec fuels, biodiesel fuels ASTM B100 & B99, specialty fuels, and blending stocks while enhancing profitability.
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