Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.