Nippon Shokubai Co., Ltd.

Akira Kurusu

Yuuji Shimasaki

Hitoshi Yano

Nobuji Kishimoto

Etsushige Matsunami

Isao Nakamura

Yoshinari Yamaguchi

Hideyuki Kanbe

A process for recovering N-vinyl-2-pyrrolidone is provided which allows to recover N-vinyl-2-pyrrolidone efficiently and steadily and in high purity by continuous distillation from a mixed liquid containing N-vinyl-2-pyrrolidone, N-(2-hydroxyethyl)-2-pyrrolidone, compounds having a higher boiling point than N-vinyl-2-pyrrolidone and water. The process includes continuously distilling the mixed liquid using a distilling column, controlling the temperature of the bottom liquid of the distilling column at 180&deg; C. or less.

Process for recovering N-vinyl-2-pyrrolidone

There is provided a process for producing a tertiary amine compound in one step without using any subsidiary raw material or any solvent, by subjecting a secondary amine compound and an alcohol to an intermolecular dehydration reaction in a gas phase. The process uses, as a catalyst, an oxide containing an alkali metal element and/or an alkaline earth metal element and silicon.

Process for production of tertiary amine compound

Method for the preparation of (meth)acrylonitriles

There is provided a simple and rational process for production of a vinyl ether, which comprises subjecting a 2-hydroxyalkoxy compound having, in the molecule, at least one 2-hydroxyalkoxy group and at least one functional group selected from the group consisting of a hydroxyl group and an amino group, to an intramolecular dehydration reaction in a gas phase to convert the compound into a corresponding functional group-containing vinyl ether in one step without using any subsidiary raw material or any solvent. The process is characterized by using, as a catalyst, an oxide containing an alkali metal element and/or an alkaline earth metal element and silicon.

Process for production of vinyl ether

The present invention provides a process for producing an N-vinyl compound, which comprises subjecting an N-(-alkoxyalkyl) compound to gas phase intramolecular alcohol elimination to convert said compound to an N-vinyl compound directly in one step, wherein a solid oxide containing phosphorus and an alkali metal and/or an alkaline earth metal is used as a catalyst. This process need not use any solvent or any auxiliary raw material and consequently can produce an N-vinyl compound simply and safely without generating any waste material derived from the auxiliary raw material.

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Kyoto, Japan

Akira Kurusu