Zurich, Switzerland

Hitachi Zosen Corporation

www.hitachizosen.co.jp/
Zurich, Switzerland

Hitachi Shipbuilding Corporation is a major Japanese industrial and engineering corporation. It produces waste treatment plants, industrial plants, precision machinery, industrial machinery, steel mill process equipment, steel structures, construction machinery, tunneling machines, and power plants. Despite its name, Hitachi Shipbuilding no longer builds ships, having spun this business off in 2002. Wikipedia.

SEARCH FILTERS
Time filter
Source Type

Patent
Hitachi Zosen Corporation | Date: 2017-05-17

One object of the present invention is to provide a zeolite membrane that can achieve both practically sufficient separation performance and throughput and maintain the separation performance stably for a long period Provided is a method of producing a zeolite membrane having CHA crystal structure on an intermediate layer of a porous support, wherein Si/Al (a molar ratio) of CHA zeolite particles is from 9.5 to 100.5 and, in an X-ray diffraction pattern obtained by applying X-ray onto a surface of the zeolite membrane, a peak intensity near 2=18 is less than 0.5 times a peak intensity near 2=21, and/or a peak intensity near 2=10 is less than 4 times a peak intensity near 2=21, the method including: forming the zeolite membrane having the CHA crystal structure on the intermediate layer of the porous support by hydrothermal synthesis, using an aqueous reaction mixture including a Si element source, an Al element source, an alkali source, and an organic template, wherein non-dealuminated FAU zeolite is used as the Si element source and the Al element source.


The present invention addresses the problem and purpose of providing a honeycomb structure that has a sufficiently high strength and is excellent in endurance, and a catalyst for cleaning an exhaust gas using the same that is excellent in resistance to sulfur oxide (SOX). The honeycomb structure of the present invention is one consists of a flat inorganic fiber sheet comprising an inorganic fiber sheet having supported thereon an inorganic binder and zeolite, and a corrugated inorganic fiber sheet comprising an inorganic fiber sheet having supported thereon the same inorganic binder and zeolite, which are alternately combined with each other, wherein it is characterized in that the zeolite has a particle diameter (i.e., a median particle diameter, D50) of from 0.5 to 10.0 m.


An electron beam sterilization method for a bottle cap is provided to sterilize a bottle cap (C) by dropping the bottle cap (C) sequentially along a sterilization path (15e) in the vertical direction while the bottle cap (C) is oriented such that the cap axis thereof passing through the center of an opening face is substantially horizontal, and applying an electron beam onto the bottle cap (C). The method has the following steps. First, in the sterilization path (15e), an ambient gas is sucked through a suction hole (25) formed along the vertical direction in a guide wall, thereby drawing the closed face of the bottle cap (C) toward the guide wall, and an electron beam is applied onto the opening face of the bottle cap (C). Next, in the sterilization path, an ambient gas is sucked through a suction hole formed along the vertical direction in a guide wall, thereby drawing the opening face of the bottle cap toward the guide wall, and an electron beam is applied onto the closed face of the bottle cap.


Patent
Hitachi Zosen Corporation | Date: 2017-02-01

An all-solid-state secondary battery includes a positive electrode layer (2) and a negative electrode layer (4) that are disposed on a positive electrode current collector (1) and a negative electrode current collector (5), respectively, and are pressurized thereon, and a solid electrolyte layer (3) interposed between the positive electrode layer (2) and the negative electrode layer (4). The positive electrode layer (2) and the negative electrode layer (4) contain a sulfide inorganic solid electrolyte, and the positive electrode current collector (1) and the negative electrode current collector (5) have a peel strength of at least 0.2 N/mm relative to the sulfide inorganic solid electrolyte in a peel test.


To provide a catalyst for purifying a combustion exhaust gas and a method for purifying a combustion exhaust gas, in which in the removal of a nitrogen oxide from an exhaust gas in a relatively low temperature range discharged, for example, from an internal combustion engine, such as a marine diesel engine, the selectivity of an alcohol reducing agent to the denitration reaction is increased as compared to the ordinary technique, and thereby the denitration capability is enhanced with an amount of the reducing agent that is equivalent to the ordinary technique, thereby enabling the exhaust gas processing performed with a high efficiency. The denitration catalyst used in a method for purifying a combustion exhaust gas of removing a nitrogen oxide in the exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol as a reducing agent added thereto, contains zeolite as a support having supported thereon a catalyst metal, in a powder X-ray diffraction (XRD) measurement of the denitration catalyst a ratio (relative peak intensity ratio) r = I/J of a height I of a diffraction peak at a diffraction angle (2) of from 7.8 to 10.0 and a height J of a diffraction peak at a diffraction angle (2) of from 28.0 to 31.0 being in a range of from 3.0 to 5.0.


A methanation reaction catalyst for methanation by allowing carbon dioxide to react with hydrogen, wherein the methanation reaction catalyst includes a stabilized zirconia support having a tetragonal crystal structure and in which Ca and Ni are incorporated in the crystal structure, and Ni in the metal state supported on the stabilized zirconia support, includes the following in atomic % based on metals in the element state, A) Zr composing the stabilized zirconia support: 6 to 62 atomic %, B) Ca incorporated in the crystal structure: 1 to 20 atomic %, and C) a total of Ni incorporated in the crystal structure and Ni supported on the stabilized zirconia support: 30 to 90 atomic %, and the atomic ratio of Ca/(Zr + Ca) is 0.14 to 0.25.


Patent
Hitachi Zosen Corporation | Date: 2017-05-10

An electrostatic screen printer 10 includes: an electrically conductive screen 6 arranged in non-contact with a printing medium; a first sponge 1 and a second sponge 2 (hereinafter the sponges 1, 2) configured to rub a powder 7 into the screen 6; and a direct current power source configured to apply a voltage to the printing medium and the powder 7, wherein the powder 7 rubbed into the screen 6 is adhered to the printing medium by electrostatic induction. The electrostatic screen printer 10 includes a rotation mechanism 5 for rotating the sponges 1,2, a parent revolution mechanism 3 for parent revolution of the sponges 1, 2, and a child revolution mechanism 4 for child revolution of the sponges 1,2. The revolution speed ratio of the child revolution to the parent revolution (c/p) may preferably be 4.0 or greater, a scraper 34 is provided on the parent revolution mechanism 3 so as to be interlocked with the revolution of the sponges 1,2, and the scraper 34 is arranged so as to scrape the powder 7 on the screen 6 toward an axis Op of the parent revolution because of the interlocking.


Disclosed is a catalyst for methanation reaction producing methane with high conversion by reaction of hydrogen with carbon dioxide, or a gas mixture of carbon dioxide and carbon monoxide, or a gas mixture containing these compounds as the main components. The catalyst is prepared by the steps of mixing (A) aqueous zirconia sol with salts of (B) stabilizing element(s), which is selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ca and Mg, and (C) iron group element(s), drying and calcining the mixture to obtain a catalyst precursor, and subsequent reduction of the precursor. The catalyst comprises, by atomic %, A: 18-70%, B: 1-20% and C: 25-80% based on the elemental states of the metals. The catalyst is characterized by multiple oxide of tetragonal zirconia structure, in which not only the stabilizing element(s) but also a part of the iron group element(s) is incorporated, and on which the iron group element(s) in the metallic state is supported.


Disclosed is a catalyst for methanation reaction producing methane with high conversion by reaction of hydrogen with carbon dioxide, or a gas mixture of carbon dioxide and carbon monoxide, or a gas mixture containing these compounds as the main components. The catalyst is prepared by the steps of mixing (A) aqueous zirconia sol with salts of (B) stabilizing element(s), which is selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ca and Mg, and (C) iron group element(s), drying and calcining the mixture to obtain a catalyst precursor, and subsequent reduction of the precursor. The catalyst comprises, by atomic %, A: 18-70%, B: 1-20% and C: 25-80% based on the elemental states of the metals. The catalyst is characterized by multiple oxide of tetragonal zirconia structure, in which not only the stabilizing element (s) but also a part of the iron group element(s) is incorporated, and on which the iron group element(s) in the metallic state is supported.


Patent
Hitachi Zosen Corporation | Date: 2017-04-12

A marine engine exhaust gas purification system (1) purifies exhaust gas from a marine engine (80) through reduction by a reductor (70) in a ship (10) including a fresh water generator (20), the marine engine (80), and the reductor (70). The exhaust gas purification system (1) includes a powder storage tank (30) that stores urea powder (3) for the reduction and a solvent feed line (21) that supplies, into the powder storage tank (30), water refined by the fresh water generator (20). The powder storage tank (30) allowing production of high-concentration urea water by dissolving the urea powder (3) in the water supplied from the solvent feed line (21). The exhaust gas purification system (1) includes a urea water feed line (31) that supplies the produced high-concentration urea water as regulated urea water to the reductor (70). The reductor (70) reduces exhaust gas by supplying the regulated urea water from the urea water feed line (31) to the exhaust gas.

Loading Hitachi Zosen Corporation collaborators
Loading Hitachi Zosen Corporation collaborators