Toyo Soda Manufacturing Co., Ltd.

Shizuo Yamada

Hiroo Sasaki

Tetsuo Tanaka

Susumi Otsuki

Yaichro Ono

1,4-Diazabicyclo-(2,2,2)-octane is separated and recovered by adding water to a crude 1,4-diazabicyclo-(2,2,2)-octane including an alkyl pyrazine and other amines and then, separating 1,4-diazabicyclo-(2,2,2)-octane by a distillation of water and the alkyl pyrazine and a crystallization.

Separation and recovery of 1,4-diazabicyclo-(2,2,2)-octane

2-Nitrocycloalkanone, and its derivatives are prepared by reacting in a single step a cycloalkene with nitrogen dioxide and an oxygen containing gas in the presence of an aromatic hydrocarbon solvent having 6 - 10 carbon atoms, and a dimethylsulfoxide catalyst.

Growing community of inventors

Nanyo, Japan

Shizuo Yamada