Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2011-03-01
2011-03-01
Nguyen, Cam N (Department: 1736)
Mineral oils: processes and products
Refining
Sulfur removal
C502S327000, C502S329000, C502S332000, C502S335000, C502S337000, C502S342000, C502S343000, C502S415000, C502S439000
Reexamination Certificate
active
07897037
ABSTRACT:
A catalyst is provided comprising nickel in a reduced valence state on a carrier comprising zinc oxide and alumina, wherein the Zn:Ni atomic ratio is at least 12, and the catalyst particles are prepared by: mixing zinc oxide in the form of a powder and alumina or an alumina precursor in the form of a powder; peptizing the powder mixture and forming an extrudable dough by adding acid and water to the powder mixture in such amounts that the dough contains 0.8-1.2 moles acid equivalents per kg powder; extruding the extrudable dough to form extrudates; drying and calcining the extrudates; impregnating the extrudates with an aqueous solution of a nickel compound; drying, calcining and reducing the impregnated extrudates. Further provided is a process for desulphurization of a hydrocarbonaceous feedstock using such catalyst.
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“New Hydrodesulfurization Catalyst for Petroleum-Fed Fuel Cell Vehicles and Cogenerations,” by Kinya Tawara, Takeshi Nishimura, Hikoichi Iwanami, Tokuyoshi Nishimoto, and Takashi Hasuike,Ind Eng. Chem. Res. 2001, 40, pp. 2367-2370.
Nguyen Cam N
Shell Oil Company
Stewart Charles W.
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