Otsuka Kagaku Kabushiki Kaisha

Sms Siemag Aktiengesellschaft

Otsuka Chemical Co., Ltd.

Nobuyoshi Takahashi

Yoshinori Endo

Isao Tada

Herbert Weissenbaeck

Dieter Vogl

Hirofumi Nakagawa

Minoru Motoki

Tetsuji Miyata

Osama Taki

Satoshi Gotoda

Naoki Ishii

Yasuhiro Sasama

A method of processing waste iron chloride solution including ferrous chloride, ferric chloride or mixtures thereof and optionally free hydrochloric acid, includes concentrating waste iron chloride solution into concentrated liquid having iron chloride concentration of at least 30%-40% by weight; optionally oxidizing ferrous chloride in the concentrated liquid from the concentration step to ferric chloride providing liquid containing ferric chloride; hydrolyzing the liquid containing ferric chloride from the oxidation step at 155-350&#xb0; C., maintaining the ferric chloride concentration at least at 65% by weight, generating steam containing hydrogen chloride and liquid containing ferric oxide; separating ferric oxide from the liquid containing ferric oxide in the hydrolysis step; condensing steam containing hydrogen chloride in the hydrolysis step, recovering hydrochloric acid at a concentration of at least 10%-15% by weight; and using condensation energy of the hydrogen chloride containing steam in the recovery step to heat the concentration step performed under reduced pressure.

Processing method for recovering iron oxide and hydrochloric acid

The acylacetonitrile compound of the invention is represented by the formula (1):wherein Rrepresents &#x2014;C(O)ZR; Rrepresents Calkyl, Chaloalkyl or the like; Z represents oxygen or sulfur; X and Y independently represent halogen, Calkyl or Chaloalkyl; and m and n are independently an integer of 1 to 3. The acylacetonitrile compound of the invention exhibits excellent miticidal and ovicidal activities for mites over a long period. Therefore, the acylacetonitrile compound of the invention is useful as a miticide.

Acylacetonitriles, process for preparation thereof and miticides containing the same

A 4-aryl-4-substituted pyrazolidine-3,5-dione derivative represented by the formula (1) is useful as an effective component of a miticide, insecticide or herbicide

4-aryl-4-substituted pyrazolidine-3, 5-dione derivatives

4, 5-dihydropyrazole-5-thione derivatives and miticides comprising the

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Naruto, Japan

Nobuyoshi Takahashi