Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha

Yoshinori Chosakon

Masahiko Miyashita

Tsukasa Oishi

Shinji Sanuki

Kazuhisa Nakajima

Susumu Hakozaki

A process for agglomerating a polymer powder which comprises mixing a polymer powder with an oxyalkylene group-containing polyvinyl alcohol resin in the presence of water and drying the resulting mixture. According to the process of the present invention, it is possible to easily prepare the polymer granules having little fine powder, a narrow particle size distribution and a large average particle size.

Process for agglomerating powder

A process for preparing acetic acid ester by reacting acetic acid with an aliphatic lower olefin in vapor phase in the presence of steam and a catalyst selected from aromatic disulfonic acids and their esters. The high activity of the catalyst can be maintained and the product is obtained in a high space time yield by the presence of steam in the reaction. The effect of maintaining the high activity can be further increased by using silica treated with a strong acid as a carrier.

Growing community of inventors

Ogaki, Japan

Yoshinori Chosakon