Abstract: An iron-containing crystalline aluminosilicate is provided which befits the incorporation as a component in a hydrocracking catalyst for hydrocarbon oil owing to the feature of exhibiting a highly satisfactory hydrocracking activity at no sacrifice of the yield of an middle distillate.

Abstract: There are disclosed a process for hydrogenating treating crude oil in the presence of a catalyst which comprises subjecting crude oil to consecutive hydrogenation demetalling treatment, hydrocracking treatment and hydrodesulfurization treatment to carry out hydrogenation treatment, subsequently carrying out gas-liquid separation in a gas-liquid separation step, and hydroreforming the resultant gas-phase fluid; and reformed crude oil or reformed topped crude oil which is produced by mixing the liquid-phase fluid produced from the gas-liquid separation step and the hydroreformed gas-phase fluid. The process markedly improves the qualities of kerosene and gas oil fractions in the product oil, which are expected to clear the prospectively intensified worldwide regulations on sulfur contents, aromatic components and the like.

Abstract: Disclosed herein is a process for efficiently and stably producing high-quality kerosene and gas oil from crude oil or crude oil from which naphtha fraction is removed through the hydrotreatment of the crude oil by using a specific hydrotreatment catalyst; a process capable of prolonging the service life of the catalyst; a process capable of extending the continuous operation period of the process equipment; a process simplifying a petroleum refinery equipment; and the like. There are used, as hydrotreatment catalysts in the hydrotreatment of a hydrocarbon oil, the metals each belonging to any of the groups 6, 8, 9 and 10 of the Periodic Table which metals are supported on a carrier composed of alumina/boria, metal-containing aluminosilicate, alumina/an alkaline earth metal compound, alumina/phosphorus, alumina/titania or alumina/zirconia.

Abstract: A method of hydrotreatment of heavy hydrocarbon oil in the presence of catalysts which comprises hydrodemetallizing and hydrocracking the heavy hydrocarbon oil successively and thereafter hydrodesulfurizing and hydrodenitrogenating the treated heavy hydrocarbon oil. The hydrocracking is carried out in the presence of a catalyst comprising at least one metal or metal compound of the group VIA or the group VIII of the Periodic Table supported on a carrier comprising 10 to 90 weight % of an iron-containing aluminosilicate and 90 to 10 weight % of an inorganic oxide. Other methods of treatment of heavy hydrocarbon oil comprise the hydrotreatment in conjunction with fluid catalytic cracking and/or thermal hydrocracking. The methods provide a naphtha fraction, a kerosene fraction and a gas oil fraction which can be obtained from the heavy hydrocarbon oil efficiently with high yield.