Purification of Aromatic Hydrocarbon Streams
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United States of America Patent
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Feb 21, 2014
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Apr 1, 2013
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Abstract
The invention is directed to a process for the removal of olefin impurities from a feedstream comprising greater than equilibrium amounts of paraxylene by contact of the feedstream with a bed of solid acid catalyst to produce a product comprising reduced olefin impurities (when compared with said feedstream), said process comprising at least one of (i) reduced bed temperature on startup, and (ii) reduced flow rate on startup, wherein, in embodiments, there is a reduction in side reactions such as isomerization and/or transalkylation and/or disproportionation of paraxylene, when compared with conventional startup procedures.
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