Nippoh Chemicals Co., Ltd.

Nippon Chemicals Co., Ltd.

Yukihiko Hanamura

Kazuhisa Inoue

Tomohiro Ikegami

Takaaki Miyazawa

Shinji Uchikoshi

A method of the present invention for producing a halohydantoin compound by refining, in a dryer (), a composition containing at least one of water and elemental halogen, an organic solvent, and the halohydantoin compound, the method includes the steps of: (i) removing the organic solvent from the composition; and (ii) removing the at least one of the water and the elemental halogen from the composition refined in the step (i).

Apparatus for producing halohydantoin compound

Recycling method

Method and apparatus for producing halohydantoin compound, recycling method, and halohydantoin compound

A method for producing a halohydantoin compound according to the present invention includes the steps of: (a) providing, in a dryer, a composition containing (i) at least one component selected from the group consisting of water, an organic solvent, and elemental halogen and (ii) a halohydantoin compound; and (b) drying the composition under reduced pressure in the dryer, the reduced pressure being reduced to a pressure lower than atmospheric pressure while introducing an inert gas from an outside source into the dryer.

Method for producing halohydantoin compound and halohydantoin compound

The present invention provides a means which can inhibit release of Iin production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I. The present invention provides a production method for 1,3-diiodohydantoin compound comprising a step to prepare a wet body containing a 1,3-diiodohydantoin compound, and (1) a step to dry the wet body by contacting the wet body with heated gas or (2) a step to lyophilize the wet body, a storage method for 1,3-diiodohydantoin compound comprising a step to store a 1,3-diiodohydantoin compound under a temperature condition of 15&#xb0; C. or lower, and a 1,3-diiodohydantoin compound wherein content of released Iis 1% by mass or less.

1,3-diiodohydantoin compound and production method thereof

1,3-Diiodohydantoin compound and production method thereof

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Isumi, Japan

Yukihiko Hanamura