Nippon Steel Corporation

Nippon Steel Chemical Co., Ltd.

Rikagaku Kenkyusho

Mitsui Takeda Chemicals, Inc.

Makoto Yamasaki

Masahiro Fuda

Hiromasa Shoji

Koichi Chiba

Kenichiro Tadokoro

Tadashi Sakon

Naoya Hamada

Yoichiro Mori

Ryousuke Wake

Tsutomu Tawa

Maki Sato

Shigeyoshi Arai

Hayato Kaetsu

Yoshiharu Horita

Takashi Otsubo

Yuji Fujioka

Ikuo Jitsuhara

Tomozumi Murata

Syohei Isomura

Takumi Kono

Chikako Kouda

Fumiaki Hirata

A metal plate having a rust preventive organic layer, said rust-preventive organic layer being a colloid or micelle of a slightly water soluble organic corrosion inhibitor as an organic layer mixed with and dispersed in a matrix resin, its production process and a treatment liquid in which it is processed.

Metallic sheet having rust-preventive organic coating thereon, process for the production thereof and treating fluid therefor

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

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Yokohama, Japan

Makoto Yamasaki