Abstract: A catalyst comprising metal components selected from Group VIA and Group VIII of the Periodic Table on a carrier comprising an alumina-containing inorganic oxide and a faujasite type Y zeolite having a specified particle size distribution, can exhibit a superior desulfurizing activity and produce an middle distillate such as kerosene and light gas oil in a high yield.

Abstract: A cultured colored pearl comprises a concretion of layers of pearl around the invading material which is a molded article composed predominantly of powders of waste pearls, shells, waste coral and/or shells of Crustacea.

Abstract: A catalyst composition that is prepared by adding phosphorus to a hydrogel slurry of fibrous pseudoboehmite having a diameter of 0.05-0.3 .mu. and a length of 0.5 .mu. or more, mixing a crystalline aluminosilicate zeolite and a clay mineral therewith, spray drying this mixture and calcining, and has a total pore volume (PV) of 0.3-0.7 cc/g, a volume (PVa) occupied by pores whose diameter is 600 .ANG. or less of 0.3-0.7 cc/g and a PVb/PVa ratio where PV-PVa=PVb of 0.5-2.0, displays superior activity, selectivity and metals tolerance when used in the fluid cat-cracking of heavy hydrocarbon oils, in particular residual oils.

Abstract: A composite comprising a core of urease-containing particles covered with fine zeolite powders for decomposing urea dissolved in a liquid and adsorbing a product resulting from said decomposition.

Abstract: As modified zeolite is disclosed here wherein the volume occupied by pores having a diameter ranging from 50 .ANG. to 600 .ANG. measured by the nitrogen gas absorption method is 30% or more of the volume occupied by pores having a diameter ranging from 0 to 600 .ANG.. The catalyst containing this modified zeolite is suitably used especially in hydroprocessing heavy hydrocarbon oil.

Abstract: According to the present invention, a catalyst composition for use in cracking hydrocarbon can be prepared by spray drying an aqueous slurry containing a flash calcined alumina obtained by contacting an aluminum hydroxide with a hot air of 350.degree.-700.degree. C. in a short time within 5 seconds, kaolin, a precursor substance of a silica-system matrix and a crystalline aluminosilicate. Since this catalyst composition contains the flash calcined alumina and kaolin in addition to the siliceous matrix and the crystalline aluminosilicate, it can exhibit an excellent selectivity for production of intermediate fractions such as kerosene, gas oil and the like, when used for catalytic cracking of hydrocarbon.

Abstract: A catalyst composition suitable for catalytic cracking of a heavy hydrocarbon oil containing large amounts of metal contaminants is prepared by the steps of spray-drying an aqueous slurry containing a flash calcined alumina obtained by contacting an aluminum hydroxide prepared Bayer's process with a hot air of 350.degree.-700.degree. C. for 5 seconds or less, clay being predominantly composed of silica and alumina, a precursor of a siliceous inorganic oxide and a crystalline aluminosilicate; washing this particle until the alkali metal content therein is reduced to 1.0 wt % or less as oxide; and thereafter incorporating a rare earth component in the particle.

Abstract: Impregnation of a crystalline aluminosilicate-containing cracking catalyst with a metal component of Group IVB enhances the catalytic activity, gasoline selectivity and thermal and hydrothermal stability of the catalyst, and further improves the catalyst's capacity of producing a high-octane gasoline.

Abstract: A two-stage process for hydrotreating asphaltenes and metallic contaminants-containing heavy hydrocarbon oils which comprises a demetallization step using a catalyst composition which is smaller in pore size and less in active metal amount than the conventional demetallization catalysts, and a hydrotreating step using a catalyst composition which is larger in pore size and more in active metal amount than the conventional hydrodesulfurization catalysts or hydrocracking catalysts, said hydrotreating step being located downstream of said demetallization step.

Abstract: Incorporation of a lithium component in a composition comprising a porous siliceous matrix and a crystalline aluminosilicate dispersed therein provides a hydrocarbon catalytic cracking catalyst having superior cracking activity and selectivity and also having a superior thermal and hydrothermal stability.

Abstract: The material obtained by coating a small plate substrate with a metal oxide doped with different metals is light permeable as well as conductive, wherein said plate substrate is selected from mica, illite, bravaisite, kaolinite, bentonite, montmorillonite, smectites, calcium phosphate and glass particle and its ratio of major axis to minor axis is 1-30 and its ratio of minor axis to thickness is 5 or more. This material is useful as the additive for providing a transparent film with conductivity.

Abstract: A catalyst, prepared by supporting a catalytic effective amount of hydrogenation metal on a catalyst carrier material comprising zeolite and an amorphous inorganic oxide and further incorporating 1-15 wt % of sulfate anions therein, is effective as a hydrotreating catalyst for producing an intermediate fraction with a high yield by desulfurization, demetallization and dentrification of heavy oils.

Abstract: A catalyst which comprises titanium oxide reinforcing material and oxides of one or more metals selected from Group Ia, Group IIa, Group IIb and Group IVb of the periodic table, the weight of said oxides corresponding to at least 0.5 wt. % of the weight of a final catalyst exhibits an excellent activity in hydrolysis of carbonyl sulfide. Said catalytic activity has no possibility of deterioration even in the presence of hydrogen sulfide and/or carbon dioxide coexist with feed gas.

Abstract: A hydrocracking catalyst composition comprising metals of Group VIb and Group VIII deposited on a carrier material consisting of Y-zeolite and one or more members of the group consisting of alumina/zinc oxide, alumina/boria and alumina/silica/magnesia, the greater part of the pores of said composition having a diameter of 70-110 .ANG. even when measured by nitrogen adsorption method or by means of a porosimeter under pressure. The catalyst composition having the pores as mentioned above is made by using, as an alumina component of the carrier material, an alumina cake obtained from an amorphous alumina hydrate slurry containing a pseudoboehmite having a crystal size grown in the range of 40 to 80 .ANG..

Abstract: A liquid composition comprising a dispersion of silica colloid in alcohol and a thermo-setting resin. The dry film of this composition is superior in chemical resistance, surface hardness, abrasion resistance, heat resistance and adhesiveness to a substrate.

Abstract: A method of synthesizing a crystalline aluminosilicate zeolite from a reaction mixture containing a base, silica, alumina and water, wherein an alkali metal compound and an amide compound are concurrently used as said base.

Abstract: A catalytic composite of Group VIB metal, Group VIII metal and a porous alumina carrier material is manufactured by controlling a water of hydration of pseudo-boehmite contained in an amorphous alumina hydrate slurry in the range of 1.20-1.50 mols per mol of Al.sub.2 O.sub.3 ; forming an alumina hydrate obtained from this slurry into alumina particles and drying; and then calcining the alumina particles in a steam-containing atmosphere to thereby obtain a porous alumina carrier material, the resulting porous alumina carrier material being subsequently incorporated with catalytically effective amounts of a Group VIB metal compound and a Group VIII metal compound.

Abstract: A catalyst composition for the vapor phase reduction of nitrogen oxides with ammonia, which consists essentially of a non-noble transition metal compound supported on a shaped carrier comprising a titanium oxide and a clay mineral having an average particle size of 0.1 to 100 microns. The shaped carrier preferably contains an additional component which is an inorganic fibrous material, silica hydrogel, silica sol, or a mixture of at least two of these. An exhaust gas containing nitrogen oxides is treated, with a high percent NO removal, by contacting it with the catalyst composition in the presence of ammonia gas at 200 to 600.degree. C.

Abstract: Disclosed in the present invention is a process for removing ammoniacal nitrogen from zeolite by bringing a zeolite-containing substance employed for adsorbing ammoniacal nitrogen contained in sewage into contact with an aqueous solution of sodium carbonate having a pH value of 11.+-.1.0.

Abstract: A sewer waste-water treating agent of superior quality produced by alkali treatment of waste catalyst grains arising from the fluid-bed type catalytic cracking process, said sewer waste-water treating agent being capable of facilitating solid-liquid separation.