Japan Hydrazine Co., Ltd.

Youichi Hasegawa

Shunji Hyoda

Hirotoshi Sawada

Hiroyuki Fujita

Yasuo Oki

Fumio Toda

Process for producing alicyclic hydrazine derivatives, tetra-hydropyridazine and hexahydropyridazine

The present invention relates to a process for producing alicyclic hydrazine derivatives, tetrahydropyridazine and hexahydropyridazine which are useful as intermediate starting materials such as medicines and agricultural chemicals. Especially, the present invention provides;

Process for producing cyclic hydrazine derivatives,

A method of producing a choline having a high purity without containing by-products by using a molecule-inclusion complex of the choline as a starting material. A choline inclusion complex without containing by-products is obtained by reacting an aqueous solution of the choline containing, as by-products, those cholines to which are added ethylene oxides with host molecules such as of 1,1'-bis-.beta.-naphthol, and is further reacted with a carbon dioxide gas in order to obtain an aqueous solution of a choline carbonate and/or a choline bicarbonate of a high purity, which is then subjected to the electrolysis using a cation-exchange membrane as a diaphragm, in order to obtain an aqueous solution of the choline of a high purity without containing by-products. The choline that is obtained is a strongly basic compound having a high purity and is very useful as a photoresist-developing solution.

Method of producing choline of a high purity

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Sakaide, Japan

Youichi Hasegawa