Mitsui Toatsu Chemicals, Incorporated

Ryuichiro Tsumura

Teruo Muraishi

Muneaki Kanemaru

Toshiyuki Ichikawa

Norimichi Ishii

Keiichi Ideda

Kunimitsu Fukumura

Jin-Kai Wang

Toru Takahashi

A process for the preparation of N-substituted maleimides by conducting heat-dehydration and dehydrating imidization of N-substituted maleamic acids under azeotropic distillation of generated water in a solvent mixture containing a solvent capable of forming water azeotrope and an organic aprotic polar solvent, in the presence as catalyst of a zinc salt of a maleamic acid, metallic zinc or a zinc compound which forms a zinc salt of the N-substituted maleamic acid in the reaction system.

Preparation process of N-substituted maleimides

A process for the preparation of N-substituted maleimides by conducting heat-dehydration and dehydrating imidization of N-substituted maleamic acids under azeotropic distillation of generated water in a solvent mixture containing a solvent capable of forming water azeotrope and an organic aproptic polar solvent, in the presence as catalyst of metallic tin, tin oxide, a tin salt of a maleamic acid or a tin compound which forms a thin salt of the N-substituted maleamic acid in the reaction system.

Preparation of N-substituted maleimides by use of tin catalysts

A process for the production of alcohols by the direct hydration of an olefin with water under liquid phase hydration conditions and in the presence of a catalytic amount of a sulfonic acid catalyst represented by the general formulae (1) or (2)

Process for the production of alcohols

Growing community of inventors

Yokohama, Japan

Ryuichiro Tsumura