Nkk Corporation

Jfe Holdings, Inc.

Nippon Kokan Kabushiki Kaisha

Japan Petroleum Exploration Co., Ltd.

Inpex Corporation

Toyota Tsusho Corporation

Total Gas & Power Ventures

Yotaro Ohno

Tsutomu Shikada

Masatsugu Mizuguchi

Masami Ono

Takashi Ogawa

Kaoru Fujimoto

Keiji Tomura

Keiichi Okuyama

Seiji Aoki

Toshifumi Suzuki

Nobuaki Kobayashi

Takeshi Furukawa

Masahiro Matsuura

Sunao Nakamura

Takuya Kadowaki

Hiroshi Fukuyo

Hideomi Yanaka

Kenkichi Sato

Norio Inoue

Tohru Shiomitsu

Yasuhiko Manabe

Sadayoshi Iwabuchi

Kazuro Suzuki

Seiji Fukuda

Yasuhiro Mogi

Yasuo Miyoshi

A process for preparing dimethyl ether or a mixture of dimethyl ether and methanol including passing a raw gas containing carbon monoxide and hydrogen through a catalyst slurry containing a mixture including (a) a medium oil having as a main component, a branched, saturated aliphatic hydrocarbon having 16 to 50 carbon atoms, 1 to 7 tertiary carbon atoms, 0 quaternary carbon atoms, and 1 to 16 carbon atoms in the branched chains bonded to the tertiary carbon atom; and at least one of the tertiary carbon atoms is bonded to hydrocarbon chains with a chain length having 4 or more of carbon atoms in three directions, (b) a methanol synthesis catalyst; (c) a methanol dehydration catalyst; and (d) a methanol shift catalyst or a methanol dehydration/shift catalyst.

Process for preparing dimethyl ether and process for preparing a mixture of dimethyl ether and methanol

A catalyst for producing dimethyl ether which comprises alumina particles having an average size of 200 &#x3bc;m or less and a methanol synthesis catalyst layer formed around the alumina particles. The methanol synthesis catalyst is in an amount of 0.05 to 5 parts by weight to 1 part by weight of the alumina particles. Dimethyl ether is produced by the method of forming a slurry by introducing the catalyst into a solvent and introducing a mixed gas comprising carbon monoxide and hydrogen into the slurry.

Catalyst for producing dimethyl ether, method for producing catalyst and method for producing dimethyl ether

(a) A medium oil wherein a main component is a hydrocarbon, and the number of paraffinic carbon atoms is 70% or more with respect to a total number of carbon atoms, (b) a medium oil wherein a main component is a polybutene, (c) a medium oil wherein a main component is a mixture of hydrocarbons of the formula (1):CH&#x2014;C(CH)&#x2014;[&#x2014;CH&#x2014;C(CH)&#x2014;]&#x2014;CH&#x2014;R &#x2003;&#x2003;(1)wherein R is &#x2014;CH(CH)or &#x2014;C(CH)&#x2550;CH, and n is 1 to 10, (d) a medium oil wherein a main component is a hydrocarbon prepared by a Fischer-Tropsch synthesis, or (e) a medium oil wherein a main component is a branched paraffinic hydrocarbon prepared by hydrogenolysis of a hydrocarbon prepared by a Fischer-Tropsch synthesis, and a process of producing dimethyl ether using the medium oil, are disclosed.

Medium oil for slurry-bed reaction process and process of producing dimethyl ether

A method for producing dimethyl ether comprising: (a) reacting a raw material gas containing carbon monoxide and hydrogen in the presence of a catalyst to produce a reaction gas including dimethyl ether, carbon dioxide, carbon monoxide and hydrogen; (b) separating the reaction gas from step (a) into carbon monoxide and hydrogen, and into dimethyl ether carbon dioxide; (c) recycling to step (a) the carbon monoxide and the hydrogen which were separated from the reaction gas in step (b); (d) removing the carbon dioxide from the dimethyl ether and the carbon dioxide from step (b) to obtain the dimethyl ether; and the (e) recycling the dimethyl ether from step (d) to step (b).

Method for producing dimethyl ether

This invention provides a catalyst for producing hydrogen gas from a mixed gas comprising dimethyl ether and water vapor or carbon dioxide gas, which comprises copper, iron, cobalt, palladium, iridium, platinum, rhodium, or nickel as an active component, and a method of producing synthesis gas or hydrogen gas in a high yield at a low temperature. By using the catalyst, a fuel cell, electricity generation, reduction of iron ore and the like can be carried out.

Catalyst for manufacturing hydrogen or synthesis gas and manufacturing method of hydrogen or synthesis gas

A method for producing dimethyl ether by forming a slurry by introducing a catalyst into a solvent and introducing a mixed gas comprising carbon monoxide and hydrogen into the slurry. The catalyst comprises alumina particles having an average size of 200 .mu.m or less and a methanol synthesis catalyst layer formed around each of the alumina particles. The methanol synthesis catalyst has a weight ratio of 0.05 to 5 to a weight of the alumina particles. The catalyst is produced by forming a layer comprising a methanol synthesis catalyst around each of the alumina particles.

Method and apparatus for producing dimethyl ether

A method for depositing solid electrolyte layer includes the steps of depositing a solid electrolyte layer on an electrode substrate by an electrophoretic deposition process, firing the solid electrolyte layer at a temperature of 1,300.degree. C. or less, and depositing another electrolyte layer on the fired solid electrolyte layer by a CVD-EVD process. In accordance with the method, thin and sufficiently dense solid electrolyte layers which are suitable for solid electrolyte fuel cells can be easily produced.

Method for depositing solid electrolyte layer

A gas heating apparatus has a cylindrical outer shell disposed along a duct in which a gas to be heated flows. A pre-mixture gas supply tube is connected to the outer shell. A combustion unit including a sintered fiber mat is provided inside the outer shell with a spacing being provided between outer shell and the sintered fiber mat. The combustion unit burns the pre-mixture gas on an inner surface of the sintered fiber mat. A diffusion burner is preferably provided upstream of the outer shell and of the combustion unit to increase the heating effect. With these constructions, it is possible to obtain a smaller-sized heating apparatus which produces a higher output.

Gas heating apparatus with dual burners

A method for manufacturing cold bonded pellets comprises the steps of mixing fine iron ore with binder and pelletizing the mixture of the fine iron ore and the binder to manufacture green pellets, charging the green pellets into a travelling grate, a layer of the green pellets which has a predetermined height being formed on the travelling grate, blowing gas containing carbon dioxide into the layer of the green pellets on the travelling grate, the green pellets being cured by the gas containing carbon dioxide, and the gas having passed through the layer of the green pelllets being discharged, and drying the curen green pellets. The gas containing carbon dioxide has a concentration of 55 vol. % carbon dioxide or more. The gas containing carbon dioxide has a concentration of 20 vol. % nitrogen or less. The gas containing carbon dioxide is blown into the green pellets layer at a flow rate of 0.1 to 1.0 Nm.sup.3 /sec. for 1 m.sup.2 of the area of the grate, Nm.sup.3 being the volume of the gas in a normal condition.

Method for manufacturing cold bonded pellets

A method for manufacturing a chromium-bearing pig iron comprises the steps of charging cold bond pellets, iron ore and coke lumps into a blast furnace from above and blowing a gas containing more than 50% oxygen therein and tuyere nose flame temperature control agent into the blast furnace through the tuyere, the cold bond pellets being comprised of powdered chromium ore and powdered coke as principal feed materials. The cold bond pellets are manufactured by performing a mixing, a pelletizing and a curing step. The tuyere nose flame temperature control agent is a top gas, steam, water or CO.sub.2, which is used to control the flame temperature to 2000.degree. to 2900.degree. C.

Method for manufacturing chromium-bearing pig iron

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Tokyo, Japan

Yotaro Ohno