Japan Hydrazine Co., Ltd.

Kao Corporation

Mitsubishi Gas Chemical Company, Inc.

Kao Soap Company, Ltd.

Shiro Hojo

Yoichi Hasegawa

Tetsuji Iwasaki

Eiichi Kimura

Masakazu Furushima

Tsuneyuki Takeno

Mineo Nakagawa

Hideshi Tsuchiya

Tetsuo Takamatsu

Takeo Hirai

Tuyoshi Ichimiya

Kazuo Kimura

Disclosed is a process for the preparation of monomethylhydrazine which comprises reacting hydrazine monohydrochloride with methanol in the presence of hydrazine dihydrochloride or methyl chloride and recovering free monomethylhydrazine from the formed monomethylhydrazine hydrochloride. According to this process, monomethylhydrazine can be prepared at a high selectivity very easily while controlling formation of by-products.

Process for preparation of monomethylhydrazine

A novel plant growth regulator composition comprises a salt of 1,2-dihydropyridazine-3,6-dione and an ammonium alkylsulfate as an adjuvant at a molar ratio of 1/0.02 to 1/0.5. The above composition has remarkable supressing actions for sucker growth, sprouting and twing growth, and allows only a very small amount of hydrazine formation during a long preservation term. The composition can thus be safely applied to edible plants.

Plant growth regulator composition

A plant growth regulating composition comprising the choline salt of 6-hydroxy-3(2H)-pyridazinone and, as adjuvants, a polyoxyethylene oleyl ether and a triethanolamine alkyl-sulfate. The composition according to this invention can be prepared at a lower production cost and is easy to apply. When applied, it exhibits low toxity, and good penetration and transferability.

Plant growth inhibiting composition

Inorganic acid salts of tertiary butyl hydrazine such as hydrochloride or hydrobromide of tertiary butyl hydrazine, useful for production of azine compounds are substantially stoichiometrically produced by reaction of inorganic acid salts of hydrazine such as hydrochloride or hydrobromide of hydrazine with tertiary butyl halides such as chloride or bromide at a molar ratio of the tertiary butyl halides to inorganic acid salts of 1:7-10 at a reaction temperature of 90.degree. to 110.degree. C. for 40 to 100 minutes.

Process for producing inorganic acid salts of tertiary butyl hydrazine

Methylhydrazines are produced in high yield by reaction of trimethylanilinium halide with hydrazine or monomethylhydrazine at a reaction temperature of 80.degree. to 130.degree. C. for at least 3 hours. Methylhydrazines are useful compounds in the fields of chemical industry, such as manufacturing pharmaceuticals or agricultural chemicals, and space weapon industry.

Process for producing methylhydrazines

Tobacco yield is increased by spraying the plants after topping with an effective amount of an aqueous solution of the choline salt of maleic hydrazide.

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Sakaide, Japan

Shiro Hojo