Abstract: A novel catalytic absorbent composition is prepared with a synthetic copper or silver carbonate-containing material. The absorbent is useful for removing hydrogen sulfide and mercaptan sulfur from hydrocarbon oils, especially from feedstreams to a reformer.

Abstract: A novel catalytic absorbent composition is prepared with a synthetic copper or silver carbonate-containing material. The absorbent is useful for removing hydrogen sulfide and mercaptan sulfur from hydrocarbon oils, especially from feedstreams to a reformer.

Abstract: A novel catalytic absorbent composition is prepared with a synthetic copper or silver carbonate-containing material. The absorbent is useful for removing hydrogen sulfide and mercaptan sulfur from hydrocarbon oils, especially from feedstreams to a reformer.

Abstract: A polycrystalline diamond compact is a polycrystalline diamond wafer attached to a tungsten carbide substrate forming a disc. In this form, it is attached to a stud which is attached within a drill bit. The compact is attached to the stud with the aid of a positioning ring. When the stud is made of impact resistant material, a full pedestal may be formed on the stud to facilitate the use of the positioning ring. When the stud is made of brittle material, the positioning ring is attached to the flat face of the stud without a pedestal. The ring is positioned on a stud and the disc inserted in the ring so that the disc is positioned against the bonding surface. The disc remains in position against the bonding surface during the handling before and during the bonding process. As a second embodiment, the polycrystalline diamond compact is smaller than the disc itself and the remainder of the disc is formed of metal having the same thickness as the polycrystalline diamond compact or its tungsten carbide substrate.

Abstract: The porosity and surface area of refractory oxides are modified by adding a lithium component thereto and then calcining. The resultant material, having a lower surface area, a lower total pore volume, and a larger average pore diameter in comparison to the original refractory oxide, is highly useful as a catalyst support, particularly with respect to hydrodesulfurization catalysts.

Abstract: A hydrocarbon feedstock containing organo-sulfur compounds, such as a naphtha containing mercaptans, is desulfurized by contact, under non-hydrogenative conditions, with a reduced catalytic absorbent comprising one or more nickel components and one or more platinum group metal promoters composited with a porous refractory oxide.

Abstract: The porosity and surface area of refractory oxides are modified by adding a lithium component thereto and then calcining. The resultant material, having a lower surface area, a lower total pore volume, and a larger average pore diameter in comparison to the original refractory oxide, is highly useful as a catalyst support, particularly with respect to hydrodesulfurization catalysts.

Abstract: A hydrocarbon feedstock containing organo-sulfur compounds, such as a naphtha containing mercaptans, is desulfurized by contact, under non-hydrogenative conditions, with a reduced catalytic absorbent comprising one or more nickel components and one or more platinum group metal promoters composited with a porous refractory oxide.

Abstract: A process for sequentially reducing the amount of pyritic, organic and sulfate sulfur in coal and other carbonaceous materials and for producing synthetic fuels by contacting coal or a carbonaceous material with water, an acid and hydrogen at increased temperature and pressure. Coal or carbonaceous material-volatile products are collected and upgraded to produce synthetic fuels.

Abstract: A process for reducing the amount of pyritic, organic and sulfate sulfur in coal and other carbonaceous materials by contacting sulfur-containing coal or carbonaceous material with hydrogen, transition metal salts and a buffer under increased temperature and pressure. Pyritic sulfides are reduced to ferrous sulfides and organic sulfides are converted to metal sulfides; the sulfides are, then, leached from the coal or carbonaceous material utilizing an acid solution. Alternatively, a metal compound may be added to the acid solution to promote the formation of hydrogen sulfide.