Nippon Steel Chemical Co., Ltd.

Nippon Steel Corporation

Tokyo Institute of Technology

Jgc Corporation

Kyushu Institute of Technology

Rikagaku Kenkyusho

Mitsubishi Oil Co., Ltd.

Sasakura Engineering Co., Ltd.

Yoshiharu Horita

Koichi Chiba

Yutaka Tamaura

Naoya Hamada

Koji Miyazaki

Shigeyoshi Arai

Maki Sato

Masayoshi Muraki

Hayato Kaetsu

Kazutaka Hiraoka

Toru Kannari

Tetsuo Takito

Kenichi Fujimoto

Takashi Otsubo

Makoto Yamasaki

Yuji Fujioka

Syohei Isomura

Michio Hoshino

Takumi Kono

Tomozumi Murata

The present invention provides a steam generator capable of greatly improving energy efficiency, and an energy supply system that uses the steam generator. The steam generator of the present invention includes a high-temperature chamber to which heat of 250&#xb0; C. to 800&#xb0; C. is supplied; a low-temperature chamber arranged adjacent to the high-temperature chamber and configured to produce low-temperature steam of 50&#xb0; C. to 185&#xb0; C. from water using the heat of the high-temperature chamber; and at least one thermoelectric element arranged between the high-temperature chamber and the low-temperature chamber.

Steam generator and energy supply system using the same

This invention relates to a process for enriching carbon 13 by mixing a halogenomethane containing one or more fluorine atoms and carbon 13 of natural isotopic abundance with one or two or more additive gases selected from a group of oxygen-containing oxidizing agents, halogens, and hydrogen halides, irradiating the resulting raw material gas mixture by a carbon dioxide laser to cause selective dissociation and reaction of the halogenomethane of carbon 13, separating the unchanged substances from the reaction mixture to obtain a product enriched with carbon 13, further converting the enriched product to carbon monoxide, and enriching carbon 13 by low-temperature distillation of the carbon monoxide. The process has advantages of low overall energy consumption, high yields of carbon 13, easy separability of the unchanged substances and high degrees of carbon 13 enrichment.

Process for enriching carbon 13

The disclosure relates to a composition suitable for use in mechanical power transmission devices. It has as its principal component a hydrocarbon oil which has from 19 to 30 carbon atoms, inclusive, and three six-membered carbocyclic rings and consists of a mixture of compounds having the following formula: ##STR1## wherein R.sup.1 is a divalent straight or branched chain radical C.sub.y H.sub.2y where y is an integer of 1 through 3; R.sup.2 is a straight chain radical C.sub.z H.sub.2z where z is an integer of 1 through 3; R.sup.3, R.sup.4, and R.sup.5 are the same or different alkyl groups having from 1 through 4 carbon atoms; l, m, and n each is an integer from zero through 3; and x is zero or 1; and wherein rings A and B are hydrogenated benzene rings and ring C is a hydrogenated benzene ring when x is 1 and a hydrogenated benzene ring or a cyclohexane ring when x is zero said hydrogenated benzene rings being saturated with hydrogen to the extent of at least 80% but less than 100% of the theoretical, and the composition can additionally contain one or more of an antioxidant, a rustproofing agent, a viscosity index improver, and antifoaming agent.

Composition suitable for mechanical power transmission and process for

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Tokyo, Japan

Yoshiharu Horita