In petroleum refining, the Crude Distillation Unit (CDU) (often referred to as the Atmospheric Distillation Unit) is usually the first processing equipment through which crude oil is fed. Once in the CDU, crude oil is distilled into various products, like naphtha, kerosene, and diesel, that then serve as feedstocks for all other processing units at the refinery.[1,2]
As oil is being fed into the CDU, the first thing that happens is the crude is heated to a temperature between 215 and 280°F (100 -137°C).[2] This allows salts, which can be harmful to some equipment, to be removed at the desalter.[1,2] The now desalted crude continues through the system into the heater where it is further heated to a temperature of over 650°F (350°C).[1,2] Next, it is fed into the atmospheric column where the vapors and liquids separate.[2,3] Residues are stripped out at the bottom of the column. The products (naphtha, kerosene, diesel and gas oil) are taken from the side of the column and moved through the refinery for further processing.[2,3]
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Reuters, August 31, 2018
Par Pacific Holdings Inc shares jumped 17 percent on Thursday after the refiner said it would acquire assets from its rival in Hawaii and expand its fuels production. |
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Reuters, April 10, 2018
Total SA may restart the gasoline-producing unit at its 225,500-barrel-per-day (bpd) Port Arthur, Texas, refinery by midweek, Gulf Coast market sources said on Monday. |
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India.com, February 22, 2018
A fire reportedly broke out this morning at Bharat Petroleum's (BPCL) 190,000 bpd Kochi Refinery in India. |
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MMEX Resources Corp., November 29, 2017
MMEX Resources has begun construction of a 10,000 bpd crude distillation unit (CDU) at the company's planned refinery in the Permian Basin. |
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Reuters, August 4, 2017
ExxonMobil is considering expanding light crude processing capacity at its Beaumont, Texas, refinery with the addition of a third crude distillation unit. |
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Times of India, August 4, 2017
Three workers were injured, one severely, in a fire that also shut the small crude distillation unit (CDU) at Motiva's Port Arthur refinery. |
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The Strait Times, June 13, 2017
A fire broke out this morning in one of three crude distillation units at Singapore Refining Company's 290,000 bpd oil refinery on Jurang Island. |
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Reuters, January 20, 2017
Fire was reported on Wednesday at the Reduc refinery in the state of Rio de Janeiro controlled by Brazil's state-run oil firm Petrobras |
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Reuters, August 10, 2016
Japanese oil refiner Idemitsu Kosan Co. said it resumed operations on Sunday at the 24,000 barrel per day (bpd) vacuum distillation unit at its 160,000-bpd Hokkaido refinery, in northern Japan, after the unit caught fire earlier last week. |
