Patents by Inventor Toshitaka Hiro
Toshitaka Hiro has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20100286423Abstract: A nickel-containing film-forming material including a compound represented by a structure of the following formula (1). In the formula (1), R1 and R2 are each independently a hydrogen atom or a group represented by a structure of the following formula (2), a and b are each an integer of 0 to 4, and a and b satisfy the condition of 0<a+b?4 with the exception of a case where R1 and R2 are both hydrogen atoms. In the formula (2), R3, R4 and R5 are each independently an alkyl group of 1 to 2 carbon atoms.Type: ApplicationFiled: December 16, 2008Publication date: November 11, 2010Applicant: Showa Denko K.K.Inventors: Toshitaka Hiro, Takamitsu Kobayashi
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Patent number: 7696377Abstract: It is the objective to provide a method of stabilizing hydroxylamine at a high temperature and a high concentration or in a case that metal impurities such as Fe got mixed therewith, and a stabilized hydroxylamine solution. A method for stabilizing hydroxylamine related to the present invention is characterized by adding ethylenediamine-N,N?-di(o-hydroxyphenylacetic acid) as a preservation stabilizer.Type: GrantFiled: October 19, 2006Date of Patent: April 13, 2010Assignee: Showa Denko K.K.Inventors: Takanori Aoki, Toshitaka Hiro
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Patent number: 7491846Abstract: It is an object of the present invention to provide a process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, where the yield reduction due to formation of a complex between the produced hydroxylamine and a salt produced as a by-product or adsorption of the hydroxylamine to the by-product salt is decreased, and a high-concentration and high-purity hydroxylamine is safely produced at a high yield. The process for producing a hydroxylamine of the present invention comprises a reaction step of reacting a salt of hydroxylamine with an alkali compound to obtain a hydroxylamine while keeping the reaction solution at a pH of 7 or more, a purification step of purifying the hydroxylamine by ion exchange, and a concentration step of concentrating the hydroxylamine by distillation at the column bottom.Type: GrantFiled: August 12, 2004Date of Patent: February 17, 2009Assignee: Showa Denko K.K.Inventors: Takanori Aoki, Toshitaka Hiro
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Publication number: 20090043125Abstract: It is the objective to provide a method of stabilizing hydroxylamine at a high temperature and a high concentration or in a case that metal impurities such as Fe got mixed with, and a stabilized hydroxylamine solution. A method for stabilizing hydroxylamine related to the present invention is characterized by adding ethylenediamine-N,N?-di(o-hydroxyphenylacetic acid) as a preservation stabilizer.Type: ApplicationFiled: October 19, 2006Publication date: February 12, 2009Applicant: Showa Denko K.K.Inventors: Takanori Aoki, Toshitaka Hiro
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Publication number: 20080193362Abstract: It is an object of the present invention to provide a process for producing a hydroxylamine by reacting a salt of hydroxylamine with an alkali compound, where the yield reduction due to formation of a complex between the produced hydroxylamine and a salt produced as a by-product or adsorption of the hydroxylamine to the by-product salt is decreased, and a high-concentration and high-purity hydroxylamine is safely produced at a high yield. The process for producing a hydroxylamine of the present invention comprises a reaction step of reacting a salt of hydroxylamine with an alkali compound to obtain a hydroxylamine while keeping the reaction solution at a pH of 7 or more, a purification step of purifying the hydroxylamine by ion exchange, and a concentration step of concentrating the hydroxylamine by distillation at the column bottom.Type: ApplicationFiled: August 12, 2004Publication date: August 14, 2008Inventors: Takanori Aoki, Toshitaka Hiro
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Publication number: 20040158107Abstract: Processes are provided for producing propargyl alcohol in an industrially advantageous manner. One of the processes comprises reaction of 1,2,3-trichloropropane with 3 equivalents or more of an alkali compound to produce propargyl alcohol. The other process comprises (1) a first step of reaction of 2,3-dichloro-1-propanol with an amine to produce chloroallyl alcohol, and (2) a second step of reaction of the chloroallyl alcohol obtained in the above step (1) with an alkali compound to produce propargyl alcohol.Type: ApplicationFiled: February 9, 2004Publication date: August 12, 2004Applicant: SHOWA DENKO K.K.Inventors: Takanori Aoki, Takami Ohe, Haruki Ishikami, Makoto Saito, Toshitaka Hiro
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Patent number: 6752975Abstract: Denitrated combustion exhaust gas is desulfurized with ammonia, the waste water obtained from washing the desulfurization waste water or dust ash is filtered using calcium carbonate, the pH of the filtrate is adjusted, carbon dioxide and/or aqueous carbonic acid is added and then a flocculating agent is added, and ammonia is recovered from the supernatant after precipitation and separation of the solid portion. The recovered ammonia is added to the denitrated gas for treatment of the combustion exhaust gas.Type: GrantFiled: March 29, 2002Date of Patent: June 22, 2004Assignee: Showa Denko K.K.Inventors: Toshio Ohi, Yoshiharu Mizuno, Tatsuharu Arai, Koichi Nishimura, Tsunekichi Kuriyama, Yasuaki Toyomasu, Toshitaka Hiro
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Patent number: 6743955Abstract: Methods for continuously producing 2,3-dichloro-1-propanol (2,3-DCH) and epichlorohydrin in high yields and in a stabel manner for a long time are disclosed. In a method where allyl alcohol is chorinated in a hyrochloric acid solution and the reaction solution is introduced into a degassing tower to release hydrogen chloride and 2,3-DCH is obtained from the remaining solution, the concentraton of chlorine in the reaction mixture to be introduced into the degassing tower is maintaining to 0.015 g/ml or less and/or the partial pressure of chlorine gas in the reactor immediately before the degassing tower to 0.08 MPa or less, by monitoring and/or the partial pressure of chlorine gas in the reactor immediately before the degassing tower to 0.Type: GrantFiled: December 16, 2002Date of Patent: June 1, 2004Assignee: Showa Denko K.K.Inventors: Toshitaka Hiro, Kazuhiro Sakurai
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Patent number: 6710213Abstract: Processes are provided for producing propargyl alcohol in an industrially advantageous manner. One of the processes comprises reaction of 1,2,3-trichloropropane with 3 equivalents or more of an alkali compound to produce propargyl alcohol. The other process comprises (1) a first step of reaction of 2,3-dichloro-1-propanol with an amine to produce chloroallyl alcohol, and (2) a second step of reaction of the chloroallyl alcohol obtained in the above step (1) with an alkali compound to produce propargyl alcohol.Type: GrantFiled: April 2, 2001Date of Patent: March 23, 2004Assignee: Showa Denko K.K.Inventors: Takanori Aoki, Takami Ohe, Haruki Ishikami, Makoto Saito, Toshitaka Hiro
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Publication number: 20030149311Abstract: Methods for continuously producing 2,3-dichloro-1-propanol (2,3-DCH) and epichlorohydrin in high yields and in a stabel manner for a long time are disclosed. In a method where allyl alcohol is chorinated in a hyrochloric acid solution and the reaction solution is introduced into a degassing tower to release hydrogen chloride and 2,3-DCH is obtained from the remaining solution, the concentraton of chlorine in the reaction mixture to be introduced into the degassing tower is maintaining to 0.015 g/ml or less and/or the partial pressure of chlorine gas in the reactor immediately before the degassing tower to 0.08 MPa or less, by monitoring and/or the partial pressure of chlorine gas in the reactor immediately before the degassing tower to 0.Type: ApplicationFiled: December 16, 2002Publication date: August 7, 2003Inventors: Toshitaka Hiro, Kazuhiro Sakurai
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Publication number: 20020155038Abstract: Denitrated combustion exhaust gas is desulfurized with ammonia, the waste water obtained from washing the desulfurization waste water or dust ash is filtered using calcium carbonate, the pH of the filtrate is adjusted, carbon dioxide and/or aqueous carbonic acid is added and then a flocculating agent is added, and ammonia is recovered from the supernatant after precipitation and separation of the solid portion. The recovered ammonia is added to the denitrated gas for treatment of the combustion exhaust gas.Type: ApplicationFiled: March 29, 2002Publication date: October 24, 2002Inventors: Toshio Ohi, Yoshiharu Mizuno, Tatsuharu Arai, Koichi Nishimura, Tsunekichi Kuriyama, Yasuaki Toyomasu, Toshitaka Hiro
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Patent number: 6414204Abstract: In a process for production of allyl chloride whereby allyl alcohol and hydrogen chloride are reacted in the presence of a catalyst and the resulting allyl chloride is distilled off from the reaction system, the by-production of diallyl ether is suppressed by lowering the molar concentration ratio of hydrogen chloride with respect to allyl alcohol in the reaction solution ([AAL]½/[HCL]).Type: GrantFiled: February 15, 2001Date of Patent: July 2, 2002Assignee: Showa Denko K.K.Inventors: Kenji Usui, Shoichi Oishi, Toshitaka Hiro, Tatsuharu Arai
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Publication number: 20020045784Abstract: In a process for production of allyl chloride whereby allyl alcohol and hydrogen chloride are reacted in the presence of a catalyst and the resulting allyl chloride is distilled off from the reaction system, the by-production of diallyl ether is suppressed by lowering the molar concentration ratio of hydrogen chloride with respect to allyl alcohol in the reaction solution ([AAL]½/[HCL]).Type: ApplicationFiled: February 15, 2001Publication date: April 18, 2002Inventors: Kenji Usui, Shoichi Oishi, Toshitaka Hiro, Tatsuharu Arai
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Publication number: 20020010377Abstract: Processes are provided for producing propargyl alcohol in an industrially advantageous manner. One of the processes comprises reaction of 1,2,3-trichloropropane with 3 equivalents or more of an alkali compound to produce propargyl alcohol. The other process comprises (1) a first step of reaction of 2,3-dichloro-1-propanol with an amine to produce chloroallyl alcohol, and (2) a second step of reaction of the chloroallyl alcohol obtained in the above step (1) with an alkali compound to produce propargyl alcohol.Type: ApplicationFiled: April 2, 2001Publication date: January 24, 2002Inventors: Takanori Aoki, Takami Ohe, Haruki Ishikami, Makoto Saito, Toshitaka Hiro