Chiyoda Corporation

Makino Milling Machine Company, Ltd

Research Association for the Utilization of Light Oil

Canon Kabushiki Kaisha

Canon Denshi Kabushiki Kaisha

Mitsubishi Oil Co., Ltd.

Research Association for Utilization of Light Oil

Shinichi Inoue

Yukitaka Wada

Toshiji Makabe

Akihiro Mutou

Kenji Makino

Jun Yoshida

Takeo Ono

Akira Kawana

Yutaka Kusano

Fumio Kumata

Kazuo Takahashi

Kazuo Hirabayashi

Tadami Kondoh

Hitoshi Nozaki

Akihiro Muto

Fujihiro Itoh

Tatsuya Hisaki

Hisashi Nomura

Tateo Ono

Hidehiko Kudou

Masaaki Ueda

Hiroaki Nishijima

Haruto Kobayashi

Toru Takatsuka

Shinji Koike

Kenichi Imagawa

Kazumasa Kono

Hirokazu Goto

Shuzo Abiko

Hideshi Sato

Kouji Adachi

Masakazu Kuhara

Tohoru Matuda

Tooru Matuda

Toshio Wakai

Fumiho Igarashi

Nobuko Hoshino

Kohji Adachi

Shunji Shibata

Teruo Murakami

Kazutomo Shimizu

Tatsuo Morimoto

A hydrogenation catalyst with a small amount of supported metal that is excellent in stability and inhibition of side reactions is provided. The catalyst hydrogenates an aromatic hydrocarbon compound into an alicyclic hydrocarbon compound, and a Group X metal represented by nickel is supported in a composite support including at least alumina and titania. The composite support preferably includes at least an alumina substrate coated with titania. It is also preferable that the Group X metal is prereduced by hydrogen. In the case that the Group X metal is nickel, the nickel content is preferably 5-35 wt % as nickel oxide in the catalyst. The substrate includes, for example, a porous structure formed by a plurality of needle-shaped or column-shaped intertwined three-dimensionally.

Hydrogenation catalyst for aromatic hydrocarbon and hydrotreatment method using the catalyst

Provided is a method of reactivating a used titania catalyst for hydrogenation treatment, capable of improving the catalytic activity of the used titania catalyst for hydrogenation treatment that is obtained by supporting a catalyst component on a titania support and exhibits reduced catalytic activity after having been used for hydrogenation treatment of a hydrocarbon oil, to a level comparable to that of a newly prepared fresh titania catalyst before use. The method of reactivating a used titania catalyst for hydrogenation treatment, the used titania catalyst for hydrogenation treatment being obtained by supporting a catalyst component on a titania support and exhibiting reduced catalytic activity after having been used for hydrogenation treatment of a hydrocarbon oil, includes: a coke removal step of removing a carbonaceous component on a surface of the used catalyst by heating the catalyst in an oxygen-containing gas atmosphere; an impregnation step of impregnating the carbonaceous component-removed catalyst obtained by the coke removal step with a saccharide-containing solution; and a drying step of drying the saccharide-impregnated catalyst obtained by the impregnation step, to obtain a catalyst in which a saccharide is supported.

Method for reactivating used hydrogenation treatment titania catalyst, and regenerated hydrogenation treatment titania catalyst

Provided are: a hydrotreating catalyst for hydrocarbon oil having a hydrodesulfurization activity additionally improved by: simultaneously and continuously adding an aqueous solution of an acidic compound containing titanium and an aqueous solution containing an alkaline compound to a hydrosol containing an alumina hydrate particle at a temperature of 10 to 100&#xb0; C. and a pH of 4.5 to 6.5; washing the resultant to remove a contaminating ion; forming the washed product after dehydration so as to have a moisture content at which it is formable; drying the resultant; impregnating the dried product with a catalytic component aqueous solution containing at least one kind of periodic table group 6 metal compound, at least one kind of periodic table group 8-10 metal compound, at least one kind of phosphorus compound, and at least one kind of saccharide; and drying the resultant; a manufacturing method for the catalyst; and a hydrodesulfurization treatment method for hydrocarbon oil using the catalyst.

Hydrotreating catalyst for hydrocarbon oil and method for producing same, and hydrocarbon oil hydrotreating method using same

A hydrotreating catalyst for hydrocarbon oil having a hydrodesulfurization activity additionally improved by: simultaneously and continuously adding an aqueous solution of an acidic compound containing titanium and an aqueous solution containing an alkaline compound to a hydrosol containing an alumina hydrate particle at a temperature of 10 to 100&#xb0; C. and a pH of 4.5 to 6.5; washing the resultant to remove a contaminating ion; forming the washed product after dehydration so as to have a moisture content at which it is formable; drying the resultant; impregnating the dried product with a catalytic component aqueous solution containing periodic table group 6 metal compound, periodic table group 8-10 metal compound, phosphorus compound, and saccharide; and drying the resultant; a manufacturing method for the catalyst; and a hydrodesulfurization treatment method for hydrocarbon oil using the catalyst.

This invention relates to a 4 group metal oxide and to a method for preparation thereof and the 4 group metal oxide prepared by adding a particle growth inhibiter to a hydrosol a hydrogel or a dried product of a hydrous 4 group metal oxide represented by MO(OH)(wherein M denotes a 4 group metal and x is a number greater than 0.1 or x&#x3e;0.1) followed by drying and calcining has a specific surface area of 80 m/g or more, a pore volume of 0.2 ml/g or more and a pore sharpness degree of 50% or more and excellent heat stability and is useful for a catalyst or a catalyst carrier in which a catalyst metal is dispersed to a high degree. This invention further relates to a porous 4 group metal oxide and to a method for preparation thereof and the 4 group metal oxide prepared by application of a pH swing operation is characterized by a large specific surface area, excellent heat stability, high dispersion of a catalyst metal and a controlled and sharp pore distribution and is useful for a catalyst or a catalyst carrier of excellent reaction selectivity.

Porous 4 group metal oxide and method for preparation thereof

This invention provides layered porous titanium oxide comprising an inorganic oxide as a core and titanium oxide deposited on the surface of the inorganic oxide, wherein the titanium localization index B/A represented by the ratio of the proportion of titanium (Ti) to the sum of the constituent metal (M) of the inorganic oxide and titanium (Ti) determined by X-ray photoelectron spectroscopy (XPS) [B=Ti/(Ti+M)] to the bulk mixing molar ratio of titanium (Ti) to the sum of the constituent metal (M) of the inorganic oxide and titanium (Ti) [A=Ti/(Ti+M)] is 1.6 or more and the titanium oxide is deposited on the surface of the inorganic oxide so as to be chemically and/or microscopically united to the inorganic oxide and also provides a process for producing the same and a catalyst comprising the same. The layered porous titanium oxide of this invention has a regulated pore structure, a large specific surface area, and excellent mechanical strength and is useful as a catalyst or a catalyst carrier.

Layered porous titanium oxide, process for producing the same, and catalyst comprising the same

A shaftdefines a front end portionhaving a larger diameter and an opposite tail end portionhaving a smaller diameter, the shaftbeing rotatably supported by the housingthrough a radial bearingand a pair of angular ball bearingsat the front side large diameter portionand the small diameter portion, respectively.

Rotating shaft apparatus

The invention relates to a rotating shaft apparatus for rotationally driving a spindle or a feed screw shaft and a machine tool including the rotating shaft apparatus, and is directed to enhance durability of a rotating shaft apparatus if the rotating shaft such as a spindle or a feed shaft rotates at a high speed. In order to solve the problem, according to the invention, a rotating shaft is rotationally supported by a bearing to a housing, the bearing being previously applied to or filled with a lubricant. A lubricant impregnated member, which is impregnated with a lubricant to be supplied to the bearing, is provided in the rotating shaft. The lubricant is separated and discharged from the lubricant impregnated member by centrifugal force due to the rotation of the shaft. The lubricant is supplied to the bearing through a lubricant supplying passage which is provided for fluidly connecting a space in or adjacent the bearing to the lubricant impregnated member,

Rotating shaft device and machine tool

A control device of a machine tool ( ) has an input unit ( ) for inputting the processing profile data ( ) and the workpiece data ( ) of the material and a profile of the workpiece to be processed. The control device input unit ( ) also can receive a tool path changing operation command ( ), a manual operation command ( ) and a processing condition changing command. A data base ( ) for storing at least one of the mechanical data of the machine tool to process the workpiece and the tool data of the tool mounted on the machine tool provides a signal to an estimating calculation unit ( ) for estimating at least a processing load or the occurrence of interference of the tool with the workpiece based on the data inputted by the input unit ( ) and the data stored in the data base ( ). A tool path deciding unit ( ) calculates a tool path to process the workpiece and decides processing conditions such as spindle rotating speed and the feed speed for the machine tool ( ) based on the output of the estimating calculation unit ( ).

Machining apparatus

A control apparatus for a machine tool comprises input means for inputting machining profile data on the final profile of a work and workpiece data on the material and profile of the workpiece to be machined, data storage means for storing at least one of machine data representing machine specifications of the machine tool for machining the work and tool data representing the specifications of the tools held in the machine tool, and tool path determining means for generating a tool path for machining the work and determining the conditions for machining the work including the rotational speed of the main spindle and the feed rate of the machine tool based on the data input from said input means and the data stored in said data storage means.

Machining processor

A process for producing a spherical zeolite catalyst is disclosed, which comprises dropping a zeolite-containing alumina sol into a surfactant-containing oil phase from a dropping opening directly or through air to thereby form spherical droplets of the sol, and then allowing the droplets to gel in an aqueous alkaline solution phase underlying the oil phase and withdrawing the thus gelled droplets, said dropping of the sol being conducted while the dropping opening is being impulsed to thereby impart a spherical and uniform shape to the resulting zeolite particles containing alumina as a binder, and a novel apparatus therefor.

Process for producing spherical zeolite catalyst and apparatus for

A crystalline silicate catalyst having deposited coke thereon is regenerated by being contacted with an oxygen-containing gas having a moisture content of 0.2% by volume or less at a temperature of 400.degree.-600.degree. C.

Process for the regeneration of coke-deposited, crystalline silicate

Process for preparing high-octane gasoline blending stock

A multi-track magnetic head having at least three conversion elements deposited on a common substrate includes a medium sliding face which is formed in a curved shape. The positions of at least two of the three conversion elements are shifted from each other perpendicularly to the alignment direction of the conversion elements in conformity to the curvature of the medium sliding face.

Multi-track head

Growing community of inventors

Yokohama, Japan

Shinichi Inoue