Process and apparatus for using steam cracked tar as steam cracker feed
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United States of America Patent
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Oct 19, 2010
Grant Date -
Nov 5, 2009
app pub date -
Apr 30, 2008
filing date -
Apr 30, 2008
priority date (Note) -
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Abstract
A process and apparatus are provided for steam cracking heavy feeds, including steam cracked tars. The invention heats a steam cracked tar feed to provide a depolymerized steam cracked tar containing lower boiling molecules than the steam cracked tar feed, hydrogenates the depolymerized steam cracked tar using a hydrogenating catalyst, e.g., a downward flow fixed bed hydrotreater, to provide a hydrogenated steam cracked tar. At least a portion of the hydrogenated steam cracked tar is steam cracked in a steam cracking furnace comprising a convection zone and a radiant zone.
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