Oxydehydrogenation of Ethylbenzene Using Mixed Metal Oxide or Sulfated Zirconia Catalysts to Produce Styrene
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United States of America Patent
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Issued Date -
Sep 2, 2010
app pub date -
Feb 27, 2009
filing date -
Feb 27, 2009
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Abstract
Catalysts and methods are described for the dehydrogenation of ethylbenzene in the presence of an oxidant gas, such as oxygen or carbon dioxide, using a mixed metal oxide (MMO) catalyst or lithium-promoted sulfated zirconia catalyst to prepare styrene monomer. Ethylbenzene, steam or other inert gas, and an oxidant gas are fed to an oxydehydrogenation unit containing a MMO catalyst or lithium-promoted sulfated zirconia catalyst to produce a dehydrogenated product mixture. The dehydrogenated product mixture is cooled, off gases and condensate are separated from the mixture, and the dehydrogenated product mixture is fed to a distillation unit. Styrene monomer is distilled from the dehydrogenated product mixture.
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