A method for producing xylylenediamine, including performing a first hydrogenation including hydrogenating a mixed solution including dicyanobenzene and a solvent including liquid ammonia in a fixed-bed reactor such that a reaction product (A) is produced, performing ammonia separation including separating and removing liquid ammonia included in the reaction product (A) or a reaction product (D) such that a reaction product (B) or (E) is produced, performing solid-liquid separation including subjecting the reaction product (B) or (A) to solid-liquid separation and removing a solid component such that a reaction product (C) or the reaction product (D) is produced, and performing a second hydrogenation including hydrogenating the reaction product (C) or (E) in a fixed-bed reactor. After the first hydrogenation is performed, the ammonia separation and the solid-liquid separation are performed in this order or reverse order, followed by the second hydrogenation.

A method for producing xylylenediamine, including performing a first hydrogenation including hydrogenating a mixed solution including dicyanobenzene and a solvent including liquid ammonia in a fixed-bed reactor such that a reaction product (A) is produced, performing ammonia separation including separating and removing liquid ammonia included in the reaction product (A) or a reaction product (D) such that a reaction product (B) or (E) is produced, performing solid-liquid separation including subjecting the reaction product (B) or (A) to solid-liquid separation and removing a solid component such that a reaction product (C) or the reaction product (D) is produced, and performing a second hydrogenation including hydrogenating the reaction product (C) or (E) in a fixed-bed reactor. After the first hydrogenation is performed, the ammonia separation and the solid-liquid separation are performed in this order or reverse order, followed by the second hydrogenation.

A method for producing a lubricant base oil includes a first hydrogenation treatment step of bringing a hydrogenation treatment catalyst and a light wax into contact with each other at temperature T.sub.1, and thereby obtaining a first treated oil; a second hydrogenation treatment step of bringing the hydrogenation treatment catalyst and a heavy wax into contact with each other at temperature T.sub.2, and thereby obtaining a second treated oil; and a base oil production step of obtaining a lubricant base oil from a feedstock oil containing at least one selected from the group consisting of the first treated oil and the second treated oil, in which the hydrogenation treatment catalyst is a catalyst obtained by supporting one or more metals selected from the elements of Group 6, Group 8, Group 9, and Group 10 of the Periodic Table of Elements, on an inorganic oxide support.

A method for producing a lubricant base oil includes a first hydrogenation treatment step of bringing a hydrogenation treatment catalyst and a light wax into contact with each other at temperature T.sub.1, and thereby obtaining a first treated oil; a second hydrogenation treatment step of bringing the hydrogenation treatment catalyst and a heavy wax into contact with each other at temperature T.sub.2, and thereby obtaining a second treated oil; and a base oil production step of obtaining a lubricant base oil from a feedstock oil containing at least one selected from the group consisting of the first treated oil and the second treated oil, in which the hydrogenation treatment catalyst is a catalyst obtained by supporting one or more metals selected from the elements of Group 6, Group 8, Group 9, and Group 10 of the Periodic Table of Elements, on an inorganic oxide support.

The present invention refers to catalysts that are selective for the reaction of ODH of propane to propene. Said catalysts are potassium salts of the dodecatungstophosphate ion partially substituted with vanadium and niobium, or mixed oxides of W, V, and Nb, with a tungsten bronze structure, obtained by thermal decomposition of polyoxometalate salts with a Keggin structure.

The present invention refers to catalysts that are selective for the reaction of ODH of propane to propene. Said catalysts are potassium salts of the dodecatungstophosphate ion partially substituted with vanadium and niobium, or mixed oxides of W, V, and Nb, with a tungsten bronze structure, obtained by thermal decomposition of polyoxometalate salts with a Keggin structure.

The present application relates to a hydrogenation catalyst, a process for producing the same and application thereof in the hydrotreatment of feedstock oil. The process comprises at least the following steps: (1) contacting a first active metal component and a first organic complexing agent with a carrier to obtain a composite carrier; (2) calcining the composite carrier to obtain a calcined composite carrier having a total carbon content of 1% by weight or less; and (3) contacting a second organic complexing agent with the calcined composite carrier to obtain the hydrogenation catalyst. The hydrogenation catalyst has both excellent hydrodesulfurization activity and hydrodenitrogenation activity, and exhibits a significantly prolonged service life.

The present application relates to a hydrogenation catalyst, a process for producing the same and application thereof in the hydrotreatment of feedstock oil. The process comprises at least the following steps: (1) contacting a first active metal component and a first organic complexing agent with a carrier to obtain a composite carrier; (2) calcining the composite carrier to obtain a calcined composite carrier having a total carbon content of 1% by weight or less; and (3) contacting a second organic complexing agent with the calcined composite carrier to obtain the hydrogenation catalyst. The hydrogenation catalyst has both excellent hydrodesulfurization activity and hydrodenitrogenation activity, and exhibits a significantly prolonged service life.

Methods for making a supported chromium catalyst are disclosed, and can comprise contacting a silica-coated alumina containing at least 30 wt. % silica with a chromium-containing compound in a liquid, drying, and calcining in an oxidizing atmosphere at a peak temperature of at least 650° C. to form the supported chromium catalyst. The supported chromium catalyst can contain from 0.01 to 20 wt. % chromium, and typically can have a pore volume from 0.5 to 2 mL/g and a BET surface area from 275 to 550 m.sup.2/g. The supported chromium catalyst subsequently can be used to polymerize olefins to produce, for example, ethylene-based homopolymers and copolymers having high molecular weights and broad molecular weight distributions.

Methods for making a supported chromium catalyst are disclosed, and can comprise contacting a silica-coated alumina containing at least 30 wt. % silica with a chromium-containing compound in a liquid, drying, and calcining in an oxidizing atmosphere at a peak temperature of at least 650° C. to form the supported chromium catalyst. The supported chromium catalyst can contain from 0.01 to 20 wt. % chromium, and typically can have a pore volume from 0.5 to 2 mL/g and a BET surface area from 275 to 550 m.sup.2/g. The supported chromium catalyst subsequently can be used to polymerize olefins to produce, for example, ethylene-based homopolymers and copolymers having high molecular weights and broad molecular weight distributions.