Sakai Chemical Industry Co., Ltd.

Kuraray Co., Ltd.

Toshihiro Sugaya

Kazunobu Abe

Kazuhiko Nagano

Tomoaki Tsuji

Minoru Yoneda

Keiichi Tabata

Kiyoshi Fukai

Hideto Mizutani

Shigefumi Kamisaka

Akio Nakashima

Hiroshi Nakao

Shinji Ohgama

Tsutomu Hatanaka

Chiyo Honda

Hiroyoshi Urasumi

A copper-based catalyst precursor capable of achieving a high conversion ratio and high selectivity in the isomerization reaction of a &#x3b2;,&#x3b3;-unsaturated alcohol portion and a method for producing the same and to provide a hydrogenation method in which the copper-based catalyst precursor is used are provided. Specifically, a copper-based catalyst precursor obtained by calcining a mixture containing copper, iron, aluminum, and calcium silicate in which an atomic ratio of iron and aluminum to copper [(Fe+Al)/Cu] is in a range of 1.71 to 2.5, an atomic ratio of aluminum to iron [Al/Fe] is in a range of 0.001 to 3.3, and calcium silicate is contained in a range of 15% by mass to 65% by mass at a temperature in a range of 500&#xb0; C. to 1,000&#xb0; C. and a hydrogenation method in which the copper-based catalyst precursor is used are provided.

Copper-based catalyst precursor, method for manufacturing same, and hydrogenation method

A process for the production of fine powder of metallic nickel which comprises a first step of dissolving nickel carbonate and/or nickel hydroxide in aqueous ammonia or in an aqueous solution of ammonia and at least one selected from the group consisting of ammonium carbonate, ammonium hydrogencarbonate, a carbonate of an alkali metal and a hydrogencarbonate of an alkali metal to prepare an aqueous solution of a nickel salt; converting the aqueous solution of a nickel salt to a W/O emulsion, and then removing volatile components including ammonia from the droplets to form precipitates of nickel carbonate in the droplets, thereby providing fine spherical particles of nickel carbonate; and a second step of heating the particles of nickel carbonate in the presence of a fusion preventive agent that is a compound of at least one element selected from the group consisting of alkaline earth elements, aluminum, silicon and rare earth elements in an atmosphere of hydrogen, thereby reducing the nickel carbonate to metallic nickel.

Method for producing fine powder of metallic nickel comprised of fine spherical particles

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Sakai, Japan

Toshihiro Sugaya