Method for reducing energy consumption in a process to produce styrene via dehydrogenation of ethylbenzene
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United States of America Patent
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Aug 8, 2017
Grant Date -
Jul 30, 2015
app pub date -
Aug 30, 2012
filing date -
Aug 30, 2012
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Abstract
The present invention is directed to improved methods and systems for increasing the efficiency of a dehydrogenation section of an alkenyl aromatic hydrocarbon production facility, wherein an alkyl aromatic hydrocarbon, such as ethylbenzene, is dehydrogenated to produce an alkenyl aromatic hydrocarbon, such as styrene. The disclosed methods are more energy-efficient and cost effective than currently known methods for manufacturing styrene. The methods and systems advantageously utilize multiple reheat exchangers arranged in a series and/or parallel configuration that result in an energy consumption reduction and, consequently, a utility cost savings, as well as a reduction in styrene manufacturing plant investment costs.
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