Nkk Corporation

Jfe Holdings, Inc.

Nippon Kokan Kabushiki Kaisha

Masatsugu Mizuguchi

Tsutomu Shikada

Masami Ono

Yotaro Ohno

Takashi Ogawa

Takao Ikariya

Masanori Itagaki

Kaoru Fujimoto

Keiji Tomura

Sachiko Yamamoto

Osamu Tajima

Makoto Miyazawa

Itaru Sakai

Yasuo Miyoshi

Takeshi Furukawa

Keiichi Okuyama

Seiji Aoki

Masayuki Ohmori

Akihiro Nakajima

Tetsuo Hachiya

Takuya Kadowaki

Tomomichi Nakamura

Norio Inoue

Mikoto Iemoto

Shin-Ichi Sawamura

Takehiro Yamamoto

Shihoko Maeda

Yoshiko Kawada

Takeshi Yago

Sadayoshi Iwabuchi

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

An apparatus for producing dimethyl ether comprising: a slurry-bed reactor filled with a dimethyl ether synthesis catalyst and a medium oil therefor; a condenser for condensing a gasified medium oil discharged from the reactor; an adsorber for removing a catalyst-deactivation ingredient from the medium oil condensed in the condenser; and recycle means for recycling the medium oil to the slurry-bed reactor.

Apparatus 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

Arylsulfonamide derivative and pharmaceutical compositions and use

A method for manufacturing a purified aromatic urethane. Aromatic urethanes are synthesized from a N,N'-disubstituted urea and an organic hydroxyl compound in a reaction medium. The organic hydroxyl compound and the primary aromatic amine side product which are present in the reaction mixture is distilled off and removed from the reaction mixture leaving a distillation bottom. The N,N'-disubstituted urea is separated and removed from the distillation bottom by solvent extraction of the aromatic urethane, and the aromatic urethane in the extract phase obtained in said solvent extraction is separated and purified.

Method of manufacturing aromatic urethanes

A method of manufacturing aromatic urethanes utilizes a urea production process wherein a primary aromatic amine, an aromatic nitro-compound and carbon monoxide are made to react together in the presence of a catalyst and solvents, to produce N,N'-disubstituted urea, the solvlent used in the urea production process consisting at least partly of an amide or oxygen-containing sulfur compound, and having the functions of stabilizing the catalyst and preventing it from separating out in a solution, and of increasing the activity of the catalyst, the quantity of the solvent being sufficient to permit it to fulfill these functions effectively. The method additionally includes an aromatic urethane production process wherein the N,N'-disubstituted urea produced is made to react with an organic compound containing hydroxyl groups, to produce a primary aromatic amine and aromatic urethane, the primary aromatic amine being separated to obtain the aromatic urethane.

According to a method of manufacturing a diphenylmethane dicarbamic acid ester by reacting an N-phenyl carbamic acid diester with a methylating agent in an aqueous acid solution, the aqueous acid solution is an aqueous inorganic acid solution, and the concentration of the N-phenyl carbamic acid ester in the aqueous acid solution is not more than the solubility thereof at the reaction temperature.

Method of manufacturing diphenylmethane dicarbamic acid diesters

The present invention relates to a method of manufacturing aromatic urethane, an aromatic mononitro-compound, an aromatic primary amine, and carbon monoxide being reacted using a catalyst containing a platinum group metal-containing compound as a major constituent to prepare N,N'-di-substituted urea. The resultant N,N'-di-substituted urea is reacted with a hydroxyl group-containing organic compound to prepare an aromatic primary amine and aromatic urethane, and the aromatic primary amine is separated to obtain aromatic urethane.

Method of manufacturing aromatic urethane and intermediate product

Growing community of inventors

Kunitachi, Japan

Masatsugu Mizuguchi