Ajinomoto Co., Ltd.

Takehiro Hiura

Takehiko Chikamori

Masayuki Mori

Kisho Suzuki

Masataka Yamamoto

Yasuhiro Maruta

Akifumi Hasegawa

Nobuaki Matsuoka

A method for producing a basic acid such as L-lysine is provided. A basic amino acid or a fermentation product containing the same is produced by a method including the following steps (A) and (B): (A) a step of culturing a microorganism able to produce a basic amino acid in a culture medium so that bicarbonate ions and/or carbonate ions serve as counter ions for the basic amino acid, to obtain a fermentation broth containing the basic amino acid; (B) a step of subjecting the fermentation broth to a heat treatment under a pressure sufficient for preventing generation of carbon dioxide gas from the fermentation broth.

Method for producing L-amino acid

A simple and efficient method for producing 1,5-pentanediamine in a free form is provided. The method for producing 1,5-pentanediamine in a free form from a salt of 1,5-pentanediamine includes a step of adsorbing 1,5-pentanediamine in a free form onto a column of an ion exchange resin by applying a solution of salt of 1,5-pentanediamine to the column of the ion exchange resin, and a step of eluting a solution of the 1,5-pentanediamine in a free form from the ion exchange resin by applying an eluent solution to the column of the ion exchange resin onto which the 1,5-pentanediamine in a free form is absorbed.

Method for producing 1,5-pentanediamine

Means of preserving 1,5-pentanediamine or a salt thereof without deterioration is provided. 1,5-pentanediamine or a salt thereof is preserved by adjusting any of a water content of 1,5-pentanediamine or a salt thereof purified through a distillation process, a temperature condition, and a material that comes into contact with 1,5-pentanediamine or a salt thereof.

Method for preserving 1,5-pentanediamine or salt thereof, method for preventing discoloration of 1,5-pentanediamine or salt thereof, and 1,5-pentanediamine or salt thereof in container

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Kanagawa, Japan

Takehiro Hiura