Abstract: A process is disclosed for extracting cobalt values from an aqueous solution containing cobalt and other metal values and stripping the resulting organic solution with an aqueous ammoniacal solution.

Abstract: An improved hydrocarbon conversion catalyst consisting essentially of: (A) an intermediate pore size silicaceous crystalline molecular sieve component substantially free of any catalytic loading metal; and (B) a matrix consisting essentially of (a) a gel selected from silica-alumina, silica-alumina-titania and silica-alumina-zirconia polygels, and (b) a hydrogenating component; and a process using said catalyst.

Abstract: A method of removing hydrogen sulfide contaminants from a gas stream. The gas stream is contacted with dimethyl sulfoxide promoted with the salt of an organic acid, reducing H.sub.2 S to sulfur.

Abstract: A process for hydroprocessing a hydrocarbonaceous feedstock containing constituents boiling above 350.degree. C. comprises contacting said feedstock with hydrogen under hydroprocessing conditions with a catalyst composition comprising a rigidly interconnected pack containing inorganic matrix oxide and about 10-95% fluid catalytic cracking catalyst microspheroids, based upon the total weight of said matrix oxide and said microspheroids, said pack characterized by a pore volume of at least 0.15 cc. per cc., at least about 30% of said pore volume present as pores having diameters within the range of 50-250 Angstroms and at least about 5% of said pore volume present as pores having diameters greater than 1,000 Angstroms.

Abstract: A method of manufacture of a catalyst for hydrodemetalation of feedstocks having a calculated pore diameter of at least 125 Angstroms; a surface area of at least 100 m.sup.2 /g; a pore volume of at least 0.5 cc/grams; with at least 5% of the pore volume present provided by pores having a diameter of at least 1000 Angstroms and containing no more than 6% of catalytic metals from Group VIB and no more than 3% of catalytic metals from Group VIII.

Abstract: A process is disclosed for recovery of cobalt from spent catalyst particles. The particles are roasted, leached with an ammonia/ammonium salt leach solution and then leached with a cyanide ion leach solution.

Abstract: Crystal formation of CoMoO.sub.4 and NiMoO.sub.4 is prevented in hydroprocessing catalysts containing both cobalt or nickel and molybdenum. The metals are comulled with the support material in the presence of a polyprotic acid.

Abstract: Catalyst shapes for inorganic oxide, hydroprocessing catalysts are disclosed. When the catalyst is used for diffusion limited reactions, and particularly when it is used for demetalation, shaped catalysts give longer catalyst lifetimes. Preferred shapes include fluted trilobal, asymmetric quadralobal and elongated quadralobal.

Abstract: A catalyst composition including imogolite and its use in hydrogen processing hydrocarbons are disclosed.

Abstract: Catalyst shapes for inorganic oxide, hydroprocessing catalysts are disclosed. When the catalyst is used for diffusion limited reactions, and particularly when it is used for demetalation, shaped catalysts give longer catalyst lifetimes. Preferred shapes include oval and elliptical shapes, with and without bumps.

Abstract: A process for producing lubricating oil base stock from a feedstock having a VI of less than 80 to a base stock with a VI of at least 90 with the same boiling range as the feedstock. The feedstock is contacted with a zeolite-containing hydrocracking catalyst in a first zone and an amorphous hydrocracking catalyst in the second zone. Between 25 percent and 75 percent of all hydroconversion takes place in the first zone.

Abstract: A process for electrowinning palladium values from an aqueous solution that contains platinum and palladium.

Abstract: Compositions containing fibrous clays and precalcined oxides are prepared by forming a fluid suspension of the clays with precalcined oxide particles, agitating the suspension to form a codispersion, and shaping and drying the codispersion. The precalcined oxides are preferably preloaded with catalytic metals. The compositions are useful for conversion of hydrocarbonaceous feedstocks, preferably hydroprocessing.

Abstract: Sulfite ions are removed from an aqueous liquid by decreasing the pH of the liquid to convert at least a portion of the sulfite ions to bisulfite ions and contacting the liquid with a macroreticular solid compound containing carbonyl groups that can form adducts with the bisulfite ions.

Abstract: A process for forming coke from an oil is disclosed, in which the oil is contacted with liquid-phase water and free oxygen at an elevated temperature and a pressure sufficient to maintain at least part of the water in the liquid phase.

Abstract: A porous, ceramic composition suitable for use as a catalyst support for demetalation of asphaltene-containing feedstocks is made from a combination of fibrous clays, wherein the fibers of both clays are randomly dispersed and the resulting mass extruded and calcined. The first fibrous clay is preferably halloysite and the second fibrous clay is preferably attapulgite.

Abstract: A porous ceramic composition suitable for use as a catalyst support for demetalation of asphaltene-containing feedstocks is made from the tubular form of the clay halloysite by dispersing the rods of the clay.

Abstract: A waste gas containing sulfur dioxide is desulfurized by contacting the gas with phosphorus-promoted sodium vanadate disposed upon porous alumina having a phosphorus-to-vanadium atomic ratio in the range 0.2-1.8 to 1.

Abstract: An extruded silica-alumina base catalyst is prepared by cogelling a silica sol solution containing aluminum and having a pH in the range of about 1-3. The cogelled silica-alumina is peptized to form an extrudable dough and may be mulled with Group VI-B and Group VIII metals to prepare a denitrification catalyst extrudable composition.

Abstract: A process is disclosed for cracking hydrocarbons by contacting the hydrocarbons with a catalyst composition comprising dispersed rods of fibrous form sepiolite and an inorganic oxide gel for binding the sepiolite rods.