1
Wolk Ronald H, Nongbri Govanon, Rovesti William C: Multi-zone method for demetallizing and desulfurizing crude oil or atmospheric residual oil. Hydrocarbon Research, August 26, 1975: US3901792 (73 worldwide citation)

The high level desulfurization of petroleum residuums normally having at least 100 ppm of metals from the groups of vanadium and nickel is accomplished by an initial contact stage with a contact material such as Porocel, having extensive macroporosity with more than 0.15 cc/gram pore volume in pores ...


2
Wolk Ronald H, Rovesti William C: Low sulfur fuel oil from high metals containing petroleum residuum. Hydrocarbon Research, June 25, 1974: US3819509 (23 worldwide citation)

The production of low sulfur fuel oil from a high metals containing Venezuelan petroleum residuum is improved when the reaction zone is operated with 40 to 60 volume percent of a high surface area demetalization material and a 40 to 60 volume percent of a high activity hydrogenation catalyst with a ...


3
Rovesti William C, Wolk Ronald H: Demetallization of high metals feedstocks using regenerated catalyst. Hydrocarbon Research, July 8, 1975: US3893911 (19 worldwide citation)

The demetallization of petroleum feedstocks containing a high percentage of metal impurities, particularly vanadium, by ebullated bed catalytic hydrogenation is improved through an initial pretreatment of particulate activated porous aluminum oxide catalyst in a reaction zone wherein vanadium and ca ...


4
Lebowitz Howard E, Wolk Ronald H, Rovesti William C, Stewart Norman C, Alpert Seymour B: Carburants liquides synthetiques, Synthetic liquid fuels. Electric Power Research Institute, MACRAE & CO, January 19, 1982: CA1116639

ABSTRACT OF THE DISCLOSUREAn economical, efficient process is providedemploying coal, particularly subbituminous coal, as a fuelsource for the production of distillate fuels and methanol.A hydroliquefier is operated under severe conditions toprovide a high net yield of light distillates. The vacuumr ...


5
Rovesti William C, Wolk Ronald H: Demetallisation des matieres dalimentation a forte teneur de metaux a laide de catalyseurs regeneres, Demetallization of high metals feedstocks using regenerated catalyst. Hydrocarbon Research, March 20, 1979: CA1050915

DEMETALLIZATION OF HIGH METALS FEEDSTOCKS USING REGENERATED CATALYST ABSTRACT The demetallization of petroleum feedstocks contain-ing a high percentage of metal impurities, particularlyvanadium, by ebullated bed catalytic hydrogenation is improvedthrough an initial pretreatment of particulate activa ...