Multiple preflash and exchanger (MPEX) network system for crude and vacuum units
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United States of America Patent
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Jun 13, 2017
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Jun 23, 2014
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Jun 24, 2013
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Abstract
Plants and methods are presented for crude feed pre-processing before feeding the crude feed into a crude unit or vacuum unit. Pre-processing is preferably achieved with a combination of a preflash drum and a preflash column that allows for high-temperature treatment of the liquids and separate vapor phase handling, which advantageously enables retrofitting existing plants to accommodate lighter crude feeds.
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