Patents Assigned to Nippoh Chemicals Co., Ltd.
-
Patent number: 10092853Abstract: A method of the present invention for producing a halohydantoin compound by refining, in a dryer (1), 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).Type: GrantFiled: November 14, 2016Date of Patent: October 9, 2018Assignee: NIPPOH CHEMICALS CO., LTD.Inventors: Tomohiro Ikegami, Yukihiko Hanamura, Shinji Uchikoshi
-
Patent number: 9962624Abstract: A method of the present invention for producing a halohydantoin compound by refining, in a dryer (1), 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).Type: GrantFiled: November 14, 2016Date of Patent: May 8, 2018Assignee: NIPPOH CHEMICALS CO., LTD.Inventors: Tomohiro Ikegami, Yukihiko Hanamura, Shinji Uchikoshi
-
Patent number: 9855514Abstract: A method of the present invention for producing a halohydantoin compound by refining, in a dryer (1), 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).Type: GrantFiled: November 15, 2013Date of Patent: January 2, 2018Assignee: NIPPOH CHEMICALS CO., LTD.Inventors: Tomohiro Ikegami, Yukihiko Hanamura, Shinji Uchikoshi
-
Patent number: 9834517Abstract: 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.Type: GrantFiled: November 15, 2013Date of Patent: December 5, 2017Assignee: NIPPOH CHEMICALS CO., LTD.Inventors: Tomohiro Ikegami, Yukihiko Hanamura, Kazuhisa Inoue
-
Patent number: 9656967Abstract: A production method of the present invention is a method for producing a halohydantoin compound in which method a composition including a halohydantoin compound and an impurity is treated, the method including the step of adding the composition to a mixed solvent of water and an organic solvent and washing the composition.Type: GrantFiled: November 15, 2013Date of Patent: May 23, 2017Assignee: NIPPOH CHEMICALS CO., LTD.Inventors: Naoki Fujiwara, Keisuke Takahashi
-
Patent number: 9272922Abstract: According to a method for producing an inorganic iodide in accordance with the present invention, it is possible to efficiently produce a highly pure inorganic iodide by reacting a hydrogen iodide gas with an inorganic base compound by bringing the hydrogen iodide gas into contact with the inorganic base compound. As such, it is possible to provide a simple and efficient method for producing an inorganic iodide.Type: GrantFiled: January 29, 2009Date of Patent: March 1, 2016Assignee: Nippoh Chemicals Co., Ltd.Inventors: Satoshi Kanbe, Kazumi Hosono, Masahiro Wada
-
Patent number: 8809602Abstract: A method of the present invention, for producing an iodizing agent, includes the step of electrolyzing iodine molecules in a solution by using an acid as a supporting electrolyte. This realizes (i) a method of producing an iodine cation suitable for use as an iodizing agent that does not require a sophisticated separation operation after iodizing reaction is completed, and (ii) an electrolyte used in the method. Further, a method of the present invention, for producing an aromatic iodine compound, includes the step of causing an iodizing agent, and an aromatic compound whose nucleus has one or more substituent groups and two or more hydrogen atoms, to react with each other under the presence of a certain ether compound. This realizes such a method of producing an aromatic iodine compound that position selectivity in iodizing reaction of an aromatic compound is improved.Type: GrantFiled: January 30, 2013Date of Patent: August 19, 2014Assignees: Japan Science and Technology Agency, Nippoh Chemicals Co., Ltd.Inventors: Junichi Yoshida, Seiji Suga, Kazuhide Kataoka, Koji Midorikawa, Yuji Hagiwara
-
Patent number: 8772506Abstract: The present invention provides a means which can inhibit release of I2 in production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I2. 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° C. or lower, and a 1,3-diiodohydantoin compound wherein content of released I2 is 1% by mass or less.Type: GrantFiled: December 16, 2010Date of Patent: July 8, 2014Assignee: Nippoh Chemicals Co., Ltd.Inventors: Kazuhisa Inoue, Yukihiko Hanamura, Takaaki Miyazawa
-
Patent number: 8710240Abstract: The present invention provides a means which can inhibit release of I2 in production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I2. 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° C. or lower, and a 1,3-diiodohydantoin compound wherein content of released I2 is 1% by mass or less.Type: GrantFiled: December 16, 2010Date of Patent: April 29, 2014Assignee: Nippoh Chemicals Co., Ltd.Inventors: Kazuhisa Inoue, Yukihiko Hanamura, Takaaki Miyazawa
-
Patent number: 8648223Abstract: A method of the present invention, for producing an iodizing agent, includes the step of electrolyzing iodine molecules in a solution by using an acid as a supporting electrolyte. This realizes (i) a method of producing an iodine cation suitable for use as an iodizing agent that does not require a sophisticated separation operation after iodizing reaction is completed, and (ii) an electrolyte used in the method. Further, a method of the present invention, for producing an aromatic iodine compound, includes the step of causing an iodizing agent, and an aromatic compound whose nucleus has one or more substituent groups and two or more hydrogen atoms, to react with each other under the presence of a certain ether compound. This realizes such a method of producing an aromatic iodine compound that position selectivity in iodizing reaction of an aromatic compound is improved.Type: GrantFiled: January 30, 2013Date of Patent: February 11, 2014Assignees: Japan Science and Technology Agency, Nippoh Chemicals Co., Ltd.Inventors: Junichi Yoshida, Seiji Suga, Kazuhide Kataoka, Koji Midorikawa, Yuji Hagiwara
-
Patent number: 8471053Abstract: A process according to the present invention for producing a cyanohydrin compound flow-reacts a carbonyl compound with hydrogen cyanide in the presence of a catalyst, and can therefore reduce the residence time. This makes it possible to reduce the period of time over which the resulting cyanohydrin compound is exposed to an unreacted portion of the carbonyl compound. As a result, the resulting cyanohydrin compound can be prevented from reacting with the unreacted portion. This makes it possible to produce the cyanohydrin compound in good yield. That is, the process according to the present invention for producing a cyanohydrin compound produces a cyanohydrin compound in good yield from a carbonyl compound and hydrogen cyanide.Type: GrantFiled: October 21, 2008Date of Patent: June 25, 2013Assignee: Nippoh Chemicals Co., Ltd.Inventors: Yuichiro Kinoshita, Naoki Fujiwara, Kazuya Nakagawa, Koji Midorikawa
-
Publication number: 20130144071Abstract: A method of the present invention, for producing an iodizing agent, includes the step of electrolyzing iodine molecules in a solution by using an acid as a supporting electrolyte. This realizes (i) a method of producing an iodine cation suitable for use as an iodizing agent that does not require a sophisticated separation operation after iodizing reaction is completed, and (ii) an electrolyte used in the method. Further, a method of the present invention, for producing an aromatic iodine compound, includes the step of causing an iodizing agent, and an aromatic compound whose nucleus has one or more substituent groups and two or more hydrogen atoms, to react with each other under the presence of a certain ether compound. This realizes such a method of producing an aromatic iodine compound that position selectivity in iodizing reaction of an aromatic compound is improved.Type: ApplicationFiled: January 30, 2013Publication date: June 6, 2013Applicants: NIPPOH CHEMICALS CO., LTD., JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: Japan Science and Technology Agency, Nippoh Chemicals Co., Ltd.
-
Publication number: 20130140188Abstract: A method of the present invention, for producing an iodizing agent, includes the step of electrolyzing iodine molecules in a solution by using an acid as a supporting electrolyte. This realizes (i) a method of producing an iodine cation suitable for use as an iodizing agent that does not require a sophisticated separation operation after iodizing reaction is completed, and (ii) an electrolyte used in the method. Further, a method of the present invention, for producing an aromatic iodine compound, includes the step of causing an iodizing agent, and an aromatic compound whose nucleus has one or more substituent groups and two or more hydrogen atoms, to react with each other under the presence of a certain ether compound. This realizes such a method of producing an aromatic iodine compound that position selectivity in iodizing reaction of an aromatic compound is improved.Type: ApplicationFiled: January 30, 2013Publication date: June 6, 2013Applicants: NIPPOH CHEMICALS CO., LTD., JAPAN SCIENCE AND TECHNOLOGY AGENCYInventors: JAPAN SCIENCE AND TECHNOLOGY AGENCY, NIPPOH CHEMICALS CO., LTD.
-
Patent number: 8383868Abstract: A method of the present invention, for producing an iodizing agent, includes the step of electrolyzing iodine molecules in a solution by using an acid as a supporting electrolyte. This realizes (i) a method of producing an iodine cation suitable for use as an iodizing agent that does not require a sophisticated separation operation after iodizing reaction is completed, and (ii) an electrolyte used in the method. Further, a method of the present invention, for producing an aromatic iodine compound, includes the step of causing an iodizing agent, and an aromatic compound whose nucleus has one or more substituent groups and two or more hydrogen atoms, to react with each other under the presence of a certain ether compound. This realizes such a method of producing an aromatic iodine compound that position selectivity in iodizing reaction of an aromatic compound is improved.Type: GrantFiled: March 7, 2008Date of Patent: February 26, 2013Assignees: Japan Science and Technology Agency, Nippoh Chemicals Co., Ltd.Inventors: Junichi Yoshida, Seiji Suga, Kazuhide Kataoka, Koji Midorikawa, Yuji Hagiwara
-
Patent number: 8268284Abstract: A system (100) of the present invention for producing an iodine compound includes: a raw material adjusting unit (1) for supplying hydrogen-containing gas to at least one of liquid iodine in an iodine melting pot (4) and gaseous iodine obtained by evaporating liquid iodine so as to obtain a mixture gas; a hydrogen iodide producing unit (10) including a hydrogen iodide producing tower (12) having a catalyst layer (12a) for converting the introduced mixture gas into crude hydrogen iodide gas; a hydrogen iodide refining unit for removing unreacted iodine from the introduced crude hydrogen iodide gas so as to obtain hydrogen iodide gas; and an iodine compound producing unit (30) for producing a target iodine compound from the obtained hydrogen iodide gas and a reaction material. This allows producing an iodine compound with high purity easily, efficiently, and with low cost.Type: GrantFiled: January 29, 2009Date of Patent: September 18, 2012Assignee: Nippoh Chemicals Co., Ltd.Inventors: Satoshi Kanbe, Kazumi Hosono, Masahiro Wada
-
Patent number: 8263796Abstract: A process according to the present invention for producing a cyanohydrin compound is a process for producing a cyanohydrin compound by performing a reaction between a carbonyl compound such as an aldehyde compound and hydrogen cyanide in the presence of a catalyst, a content of the carbonyl compound in a reaction system being not more than 50 mol % with respect to the cyanohydrin compound. Thus provided is a process for producing a cyanohydrin compound in good yield from an aldehyde compound and hydrogen cyanide.Type: GrantFiled: October 21, 2008Date of Patent: September 11, 2012Assignee: Nippoh Chemicals Co., Ltd.Inventors: Naoki Fujiwara, Kazuya Nakagawa, Yuichiro Kinoshita, Koji Midorikawa
-
Publication number: 20110144350Abstract: The present invention provides a means which can inhibit release of I2 in production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I2. 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° C. or lower, and a 1,3-diiodohydantoin compound wherein content of released I2 is 1% by mass or less.Type: ApplicationFiled: December 16, 2010Publication date: June 16, 2011Applicant: NIPPOH CHEMICALS CO., LTD.Inventors: Kazuhisa Inoue, Yukihiko Hanamura, Takaaki Miyazawa
-
Publication number: 20110092714Abstract: The present invention provides a means which can inhibit release of I2 in production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I2. 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° C. or lower, and a 1,3-diiodohydantoin compound wherein content of released I2 is 1% by mass or less.Type: ApplicationFiled: December 16, 2010Publication date: April 21, 2011Applicant: NIPPOH CHEMICALS CO., LTD.Inventors: Kazuhisa Inoue, Yukihiko Hanamura, Takaaki Miyazawa
-
Publication number: 20110087031Abstract: The present invention provides a means which can inhibit release of I2 in production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I2. 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° C. or lower, and a 1,3-diiodohydantoin compound wherein content of released I2 is 1% by mass or less.Type: ApplicationFiled: December 16, 2010Publication date: April 14, 2011Applicant: NIPPOH CHEMICALS CO., LTD.Inventors: Kazuhisa Inoue, Yukihiko Hanamura, Takaaki Miyazawa
-
Patent number: 7897785Abstract: The present invention provides a means which can inhibit release of I2 in production or storage of 1,3-diiodohydantoin compound, and thereby solve decrease in purity of the compound and various problems caused by I2. 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° C. or lower, and a 1,3-diiodohydantoin compound wherein content of released I2 is 1% by mass or less.Type: GrantFiled: August 30, 2006Date of Patent: March 1, 2011Assignee: Nippoh Chemicals Co., Ltd.Inventors: Kazuhisa Inoue, Yukihiko Hanamura, Takaaki Miyazawa