INTEGRATED HYDROTREATING AND ISOMERIZATION SYSTEM WITH AROMATIC SEPARATION

摘要

Deep desulfurization of hydrocarbon feeds containing undesired organosulfur compounds to produce a hydrocarbon product having low levels of sulfur, i.e., 15 ppmw or less of sulfur, is achieved by hydrotreating the feed under mild conditions, and separating the hydrotreated effluent into an aromatic-rich fraction which contains a substantial amount of the aromatic refractory and sterically hindered sulfur-containing compounds, and an aromatic-lean fraction. The aromatic-rich fraction is contacted with isomerization catalyst, and the isomerized aromatic-rich fraction is recycled to the mild hydrotreating process.

主权项

1. An apparatus for processing a hydrocarbon feed containing undesired organosulfur compounds comprising:
a mild hydrotreating zone operable to convert labile organosulfur compounds, the mild hydrotreating zone including an inlet for receiving the hydrocarbon feed and an outlet for discharging hydrotreated effluent; an aromatic separation zone operable to extract aromatic organosulfur compounds from the hydrotreated effluent, the aromatic separation zone including an inlet for receiving the hydrotreated effluent, an aromatic-rich outlet and an aromatic-lean outlet; and an isomerization reaction zone having
an inlet in fluid communication with the aromatic-rich outlet andan isomerization reaction zone outlet in fluid communication with the mild hydrotreating zone inlet for recycling isomerate.