Patent ID: 8894844
Filing Date: 2014-11-25
Classification: B01J,C10G

Abstract:
1. A method of hydrotreating an olefinic naphtha feedstream in the presence of an increased carbon monoxide content, the method comprising: contacting a first olefinic naphtha feedstream with a first hydrogen-containing treat gas stream in the presence of a first hydrotreating catalyst in a first hydrotreating reactor under first hydrotreating conditions sufficient to at least partially hydrodesuffurize and/or hydrodenitrogenate the first olefinic naphtha feedstream to produce a first hydrotreated olefinic naphtha product stream; and contacting at least a portion of the first hydrotreated olefinic naphtha product stream with a second hydrogen-containing treat gas stream in the presence of a second hydrotreating catalyst under second hvdrotreating conditions sufficient to at least partially hydrodesulftirize and/or hvdrodenitrogenate the first hydrotreated olefinic naphtha product stream to produce a second hydrotreated olefinic naphtha product stream, wherein the first olefinic naphtha feedstream and the first bydrogen-containing treat gas stream collectively have a carbon monoxide content of greater than 10 vppm and a carbon dioxide content of greater than 15 vppm; wherein the first hydrotreating catalyst converts at least 5% less carbon dioxide to carbon monoxide than the second hydrotreating catalyst at the same hydrotreating conditions; and wherein the first hydrotreating catalyst comprises cobalt and molybdenum disposed on a silica-based support.