Asahi Kasei Kabushiki Kaisha

Asahi Kasei Chemicals Corporation

Kazuhiro Takagaki

Nobuhisa Miyake

Masaaki Shinohata

Koichi Nakaoka

Yusuke Sakurai

Tsubasa Uematsu

Yusuke Ishii

Hiroyuki Yano

Yuji Kosugi

Atsushi Ohkubo

Takeharu Sasaki

Midori Nagamoto

The present invention provides a method for producing an amino acid aminoalkyl ester or an inorganic acid salt thereof by reacting a compound represented by general formula (I) shown below or a compound represented by general formula (III) shown below, or a salt thereof, and at least one compound selected from the group consisting of compounds represented by general formula (IV-I) shown below, compounds represented by general formula (IV-II) shown below, compounds represented by general formula (IV-III) shown below and compounds represented by general formula (IV-IV) shown below, or an inorganic acid salt thereof.

Method for producing amino acid aminoalkyl ester or inorganic acid salt thereof

The present invention provides a method for producing a carbamate that includes a step (1) and a step (2) described below:

Method for producing carbamate and method for producing isocyanate

An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carbamate, an inactive solvent and a polyisocyanate compound; a step of conducting a thermal decomposition reaction of the carbamate by continuously introducing the mixture liquid into a thermal decomposition reactor; a step of collecting a low-boiling decomposition product by continuously extracting the low-boiling decomposition product in a gaseous state from the reactor, the low-boiling decomposition product having a boiling point lower than the polyisocyanate compound; and a step of collecting a high-boiling component by continuously extracting, from the reactor, a liquid phase component which is not collected in a gaseous state at the step of collecting the low-boiling decomposition product.

Isocyanate production method

An object of the present invention is to provide a method for production of a high purity conjugated diolefin. The method for production of a conjugated diolefin of the present invention comprises steps of supplying a source gas containing a C4 or higher monoolefin and an oxygen-containing gas into a reactor, bringing a catalyst into contact with the gas mixture, compressing a gas containing a conjugated diolefin produced by an oxidative dehydrogenation reaction to obtain a liquefied gas and rinsing the liquefied gas with water.

Method for production of conjugated diolefin

Growing community of inventors

Tokyo, Japan

Kazuhiro Takagaki