Tokuyama Soda Kabushiki Kaisha

Celanese Gmbh

Yusuke Izumi

Hidetaka Miyazaki

Shin-ichi Kawahara

Yoshiaki Watanabe

Yukio Mizutani

Yuichi Miura

Takao Tomita

Kiyohiko Yutani

Kinya Yamazaki

Sumio Akiyama

Junji Maekawa

Masato Todo

Katsumi Suzuki

In a process for preparing hydrogen peroxide by reacting hydrogen with oxygen in the presence of a catalyst in an aqueous medium containing hydrogen peroxide, the improvement which comprises using an aqueous medium which contains dissolved hydrogen and a platinum-group catalyst having adsorbed thereto hydrogen.

Process for producing hydrogen peroxide

In a process for producing an ethyl ester of an aliphatic carboxylic acid which comprises reacting ethylene with the aliphatic carboxylic acid in the liquid phase in the presence of an acid catalyst, the improvement wherein a heteropolyacid of tungsten or an acidic metal salt thereof is used as the acid catalyst, and the reaction is carried out in the presence of water in an amount of up to 7.5% by weight based on the weight of the aliphatic carboxylic acid.

Process for preparing ethyl esters of aliphatic carboxylic acids

A process for preparing L-tartaric acid, which comprises contacting a microorganism of the genus Nocardia having the ability to produce an enzyme which cleaves and hydrolyzes the epoxy ring of cis-epoxysuccinic acid, or an enzyme isolated therefrom, with cis-epoxysuccinic acid or its derivatives in an aqueous medium, and recovering the resulting L-tartaric acid.

Process for preparing L-tartaric acid

A process for preparing hydrogen peroxide which comprises reacting hydrogen with oxygen in an aqueous medium containing a platinum-group catalyst, characterized in that the partial pressure of hydrogen and the partial pressure of oxygen in the gaseous phase of the reaction system are maintained at at least 0.5 atmosphere and at least 1.0 atmosphere respectively, and the platinum group catalyst is caused to be present in an amount, calculated as metal, of at least a minimum effective catalytic amount up to 30 mg per 100 ml. of said aqueous medium.

Process for preparing hydrogen peroxide

A process for the preparation of monohydric alcohols by contacting a monoolefin of 2-4 carbon atoms with an aqueous solution containing a heteropoly-acid ion, thereby subjecting the olefin to a hydration reaction, characterized in that said aqueous solution contains the heteropoly-acid ion in a concentration of at least 1/40,000 mol per liter and has a pH ranging from 2.0 to 4.5, and the aqueous solution is heated to a temperature sufficiently high for initiating the hydration reaction, while the free iron ion concentration therein is maintained at not higher than 10 ppm substantially throughout the whole hydration reaction period.

Process for the hydration of olefins

A process of producing ketone condensation products which comprises condensing at a temperature of from 60.degree. to 300.degree.C. a ketone having 3-19 carbon atoms in the presence of, as a catalyst, at least one metal phosphate selected from titanium phosphate, zirconium phosphate, hafnium phosphate, and tin phosphate; dimeric condensation or trimeric condensation can be achieved depending upon the reaction conditions.

Growing community of inventors

Shinnanyo, Japan

Yusuke Izumi