Sumitomo Seika Chemicals Co., Ltd.

Muneaki Tanaka

Hirokazu Kagano

Noriyuki Hayashizaka

Syuzo Satake

Ichiro Fuseya

Masato Kotake

Nobutsugu Okazawa

In a water-absorbent resin production apparatus for producing a water-absorbent resin by polymerizing a water-soluble ethylenically unsaturated monomer, a water-absorbent resin powder obtained by drying a water-absorbent resin composition with a dryer passes through a first powder flow path pipe, is discharged therefrom toward a classifier while a flow rate is regulated so as to a predetermined value by a powder flow rate regulating discharge member composed of a hopper and a rotary valve, and is classified by the classifier. In the water-absorbent resin production apparatus, a collector for collecting a powder aggregate composed of aggregated particles of the water-absorbent resin powder is disposed in the first powder flow path pipe. Accordingly, a water-absorbent resin in the form of a particulate powder from which the powder aggregate is removed can be produced at a high production efficiency.

Water-absorbent resin production apparatus

The present invention provides a process for producing (E)-N-monoalkyl-3-oxo-3-(2-thienyl)propenamine represented by Formula (1); 

(E)-N-monoalkyl-3-oxo-3-(2-thienyl) propenamine and process for producing the same and process for producing (E,Z)-N-monoalkyl-3-oxo-3-(2-thienyl) propenamine

Growing community of inventors

Hyogo, Japan

Muneaki Tanaka