Showa Denko K.k.

Showa Denko Kabushiki Kaisha

Hiroyuki Monzen

Yoshimasa Ishimura

Tsutomu Nozawa

Hideo Miyata

Kuniomi Marumo

Kohei Morikawa

Yuseki Suyama

Taketoshi Naito

Kouhei Morikawa

Motoo Miura

Shuuji Hirayama

Haruaki Ito

Katsutoshi Morinaka

Toru Sasaki

Yutaka Ohnishi

Toru Yoshida

Kazuhiko Hiromoto

Tetsuhiro Furukawa

Kimitaka Ooshiro

Shuji Hirayama

Nobuyuki Kondo

Haruki Ishigami

The present invention relates to a process by a series of reactions using tetrafluorocyanobenzens as material for producing tetrafluorobenzenemethanols, tetrafluorobenzenecarbaldehyde dialkylacetals and tetrafluorobenzenecarbaldehydes in a high purity and a high yield which are useful as intermediates in the production of cyclopropanecarboxylic acid esters having insecticidal action, and also relates to a novel tetrafluorobenzenecarbaldehyde dimethylacetal.

Process for producing tetrafluorobenzenemethanols

Noble metal, particularly ruthenium, Raney catalysts which can hydrogenate (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.

Metal raney catalysts and preparation of hydrogenated compounds therewith

Noble metal raney catalysts and preparation of hydrogenated compounds therewith

Method for manufacturing 3-isochromanone

Process for production of benzonitrile and benzyl alcohol

Noble metal, particularly ruthenium, Raney catalysts having the property of catalyzing the hydrogenation of (1) aromaticity-exhibiting ring portions of organic compounds, (2) carboxylic acids and their ester portions (carbonyl ester groups), (3) ring portions and carboxylic acid or their ester groups in compounds having such ring portions and carboxylic acid or their ester portions, and (4) ring portions and nitrile groups of aromatic nitrile compounds and methods for the preparation of corresponding hydrogenated compounds. The methods allow preparation of hydrogenated compounds having hydrogenated aromatic ring portions, hydrogenated carbonyl ester groups, hydrogenated aromatic ring and carbonyl ester groups, or hydrogenated aromatic rings and nitrile groups under milder hydrogen pressure and temperature conditions than the conventional catalysts.

Noble metal Raney catalysts and preparation of hydrogenated compounds

Process for producing hydrogen peroxide

Growing community of inventors

Kawasaki, Japan

Hiroyuki Monzen