Mineral oils: processes and products – Refining – Nitrogen contaminant removal
Patent
1991-02-11
1992-05-26
Myers, Helane
Mineral oils: processes and products
Refining
Nitrogen contaminant removal
208 59, 208177, C10G 2302, C10G 4500
Patent
active
051164841
ABSTRACT:
In a process for the hydrogenation of nitrogen-containing hydrocarbons in a hydrocarbon feedstock, the feedstock is contacted at a temperature between about 575.degree. F. and about 775.degree. F. and a pressure between about 600 psi and about 2500 psi in the presence of added hydrogen with a first catalyst bed containing a hydrotreating catalyst containing nickel, tungsten and optionally phosphorous supported on an alumina support, and, after contact with the first catalyst bed, the hydrogen and feedstock without modification is passed from the first catalyst bed to a second catalyst bed where it is contacted at a temperature between about 575.degree. F. and about 775.degree. F. and a pressure between about 600 psi and about 2500 psi with a hydrotreating catalyst containing nickel, molybdenum and optionally phosphorous supported on an alumina support.
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Myers Helane
Shell Oil Company
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