Patents by Inventor Minoru Nakashima
Minoru Nakashima 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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Patent number: 8420703Abstract: The purpose of the present invention is to provide a method for collecting effective components from polyester fiber waste containing polyalkylene telephthalate as the main component, more specifically to provide a method for separating and removing foreign matters (mainly cotton) contained in polyester fiber waste. The purpose of the invention can be achieved by a method for separating and removing foreign matters from polyester waste, which includes throwing polyester fiber waste that contains polyalkylene telephthalate as the main component and foreign matters other than the polyalkylene telephthalate into a depolymerization reaction tank, subjecting a part or all of the polyester fiber to a depolymerization reaction with alkylene glycol to give a depolymerization reaction liquid, and then continuously or intermittently feeding the liquid to a foreign matter-separating and removing apparatus having specified characteristics.Type: GrantFiled: February 19, 2008Date of Patent: April 16, 2013Assignee: Teijin Fibers LimitedInventors: Kouji Mukai, Minoru Nakashima
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Patent number: 8113354Abstract: A problem of the invention is to provide a method which targets on polyethylene terephthalate-made bottle scraps composed mainly of polyethylene and/or polypropylene, polystyrene and a polyester and which is able to treat continuously a large amount of the polyester component with a high purity and sort and recover it in a high recovery. The problem of the invention can be solved by a separation method of waste plastics, which is characterized by forming previously a crushed plastic into a water slurry, feeding the water slurry in a fixed rate range such that a swirling flow is generated within a cylindrical tank and that water rises in a fixed rate range and recovering a polyester with a high specific gravity as a precipitated component within the cylindrical tank and a plastic with a low specific gravity as an overflow component from the top of the cylindrical tank, respectively.Type: GrantFiled: June 28, 2007Date of Patent: February 14, 2012Assignee: Teijin Fibers LimitedInventors: Kozo Toida, Kazumasa Mizuno, Minoru Nakashima, Hitoshi Nagasawa
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Patent number: 7959807Abstract: To establish an efficient and economical useful component recovery method capable of recovering high purity useful components from a dyed polyester fiber. A method for recovering useful components from a dyed polyester fiber, includes a dye extraction step, a solid liquid separation step, a depolymerization reaction step, an ester interchange reaction step, and a useful component separation step, for recovering useful components from the dyed polyester fiber, wherein the dye extraction step includes a step of extracting and removing a dye at the glass transition temperature of the polyester or higher and at 220° C. or less with a xylene extracting solvent and an alkylene glycol extracting solvent in combination.Type: GrantFiled: July 31, 2006Date of Patent: June 14, 2011Assignee: Teijin Fibers LimitedInventors: Kouji Mukai, Minoru Nakashima
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Publication number: 20100298524Abstract: A liquid mixture of terephthalic acid with an alkylene glycol suitable as a starting material mixture for a polyester polycondensation reaction is produced by preparing a liquid mixture of terephthalic acid particles prepared by the hydrolysis of a dialkyl terephthalate with at least one type of alkylene glycol and having a temperature of 100 to 130° C., and then stirring the liquid mixture for 15 minutes to 3 hours while the temperature of the liquid mixture is maintained in the above-mentioned range, to control the slurry properties of the liquid mixture.Type: ApplicationFiled: November 6, 2007Publication date: November 25, 2010Applicant: TEIJIN FIBERS LIMITEDInventors: Kozo Toida, Minoru Nakashima
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Publication number: 20100032618Abstract: The purpose of the present invention is to provide a method for collecting effective components from polyester fiber waste containing polyalkylene telephthalate as the main component, more specifically to provide a method for separating and removing foreign matters (mainly cotton) contained in polyester fiber waste. The purpose of the invention can be achieved by a method for separating and removing foreign matters from polyester waste, which includes throwing polyester fiber waste that contains polyalkylene telephthalate as the main component and foreign matters other than the polyalkylene telephthalate into a depolymerization reaction tank, subjecting a part or all of the polyester fiber to a depolymerization reaction with alkylene glycol to give a depolymerization reaction liquid, and then continuously or intermittently feeding the liquid to a foreign matter-separating and removing apparatus having specified characteristics.Type: ApplicationFiled: February 19, 2008Publication date: February 11, 2010Applicant: TEIJIN FIBERS LIMITEDInventors: Kouji Mukai, Minoru Nakashima
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Publication number: 20090194465Abstract: A problem of the invention is to provide a method which targets on polyethylene terephthalate-made bottle scraps composed mainly of polyethylene and/or polypropylene, polystyrene and a polyester and which is able to treat continuously a large amount of the polyester component with a high purity and sort and recover it in a high recovery. The problem of the invention can be solved by a separation method of waste plastics, which is characterized by forming previously a crushed plastic into a water slurry, feeding the water slurry in a fixed rate range such that a swirling flow is generated within a cylindrical tank and that water rises in a fixed rate range and recovering a polyester with a high specific gravity as a precipitated component within the cylindrical tank and a plastic with a low specific gravity as an overflow component from the top of the cylindrical tank, respectively.Type: ApplicationFiled: June 28, 2007Publication date: August 6, 2009Inventors: Kozo Toida, Kazumasa Mizuno, Minoru Nakashima, Hitoshi Nagasawa
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Publication number: 20090133200Abstract: To establish an efficient and economical useful component recovery method capable of recovering high purity useful components from a dyed polyester fiber. A method for recovering useful components from a dyed polyester fiber, includes a dye extraction step, a solid liquid separation step, a depolymerization reaction step, an ester interchange reaction step, and a useful component separation step, for recovering useful components from the dyed polyester fiber, wherein the dye extraction step includes a step of extracting and removing a dye at the glass transition temperature of the polyester or higher and at 220° C. or less with a xylene extracting solvent and an alkylene glycol extracting solvent in combination.Type: ApplicationFiled: July 31, 2006Publication date: May 28, 2009Applicant: Teijin Fibers LimitedInventors: Kouji Mukai, Minoru Nakashima
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Patent number: 7462649Abstract: A through process comprising depolymerization reaction of used PET bottles with EG, recovering DMT by ester interchange reaction with MeOH, obtaining terephthalic acid by hydrolysis of the recovered DMT, and manufacturing a PET polymer which can be used for manufacturing PET bottles again by using the terephthalic acid.Type: GrantFiled: October 16, 2002Date of Patent: December 9, 2008Assignee: Teijin LimitedInventors: Takuo Nakao, Tetsuya Chikatsune, Minoru Nakashima, Minoru Suzuki, Hiroki Nagano
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Publication number: 20070299150Abstract: A through process comprising depolymerization reaction of used PET bottles with EG, recovering DMT by ester interchange reaction with MeOH, obtaining terephthalic acid by hydrolysis of the recovered DMT, and manufacturing a PET polymer which can be used for manufacturing PET bottles again by using the terephthalic acid.Type: ApplicationFiled: August 7, 2007Publication date: December 27, 2007Applicant: Teijin LimitedInventors: Takuo Nakao, Tetsuya Chikatsune, Minoru Nakashima, Minoru Suzuki, Hiroki Nagano
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Publication number: 20070235009Abstract: A control apparatus for a direct injection type spark ignition internal combustion engine can prevent the deterioration of combustion resulting from fuel adhesion according to the deterioration of performance of an injector. The apparatus includes a variety of kinds of sensors that detect an operating condition of an internal combustion engine, a target fuel injection amount calculation section that calculates a target amount of fuel to be injected based on the engine operating state, a fuel injection pressure control section that controls the injection pressure of fuel to be injected into a combustion chamber, a fuel injection timing control section, and a combustion state detection section that detects the deterioration of combustion of the internal combustion engine. The fuel injection timing control section includes a fuel pressure correction section that corrects the fuel injection pressure.Type: ApplicationFiled: December 1, 2006Publication date: October 11, 2007Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Minoru Nakashima, Akira Huruta
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Patent number: 7078440Abstract: A dimethyl terephthalate composition includes 0.001 to 200 ppm of methyl 4-(1,3-dioxolan-2-yl)benzoate and 0 to 1 ppm of dimethyl hydroxyterephthalate contained in dimethyl terephthalate, and exhibits improved properties as a material for producing polyester.Type: GrantFiled: November 22, 2001Date of Patent: July 18, 2006Assignee: Teijin LimitedInventors: Kenichi Ishihara, Kazumasa Mizuno, Minoru Nakashima, Kazuhiro Sato, Masanori Miyamoto, Taizo Mori
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Publication number: 20050004390Abstract: A through process comprising depolymerization reaction of used PET bottles with EG, recovering DMT by ester interchange reaction with MeOH, obtaining terephthalic acid by hydrolysis of the recovered DMT, and manufacturing a PET polymer which can be used for manufacturing PET bottles again by using the terephthalic acid.Type: ApplicationFiled: October 16, 2002Publication date: January 6, 2005Inventors: Takuo Nakao, Tetsuya Chikatsune, Minoru Nakashima, Minoru Suzuki, Hiroki Nagano
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Publication number: 20040054019Abstract: A dimethyl terephthalate composition includes 0.001 to 200 ppm of methyl 4-(1,3-dioxolan-2-yl)benzoate and 0 to 1 ppm of dimethyl hydroxyterephthalate contained in dimethyl terephthalate, and exhibits improved properties as a material for producing polyester.Type: ApplicationFiled: May 27, 2003Publication date: March 18, 2004Inventors: Kenichi Ishihara, Kazumasa Mizuno, Minoru Nakashima, Kazuhiro Sato, Masanori Miyamoto, Taizo Mori
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Method for separating and recovering dimethyl terephthalate and ethylene glycol from polyester waste
Patent number: 6706843Abstract: For separation and recovery of dimethyl terephthalate (DMT) and ethyiene glycol (EG) from polyester waste containing foreign materials, the polyester waste is treated in EG containing a polyester depolymerization catalyst, a solid foreign material fraction floated on the surface of the resultant reaction solution is removed and the residual solid foreign material fraction is removed from the remaining solution fraction. The remaining solution fraction is distilled and concentrated and the distilled EG is recovered. A transesterification reaction catalyst and methanol are mixed into the distillation residue. The resultant reaction mixture is recrystallized and subjected to centrifugal separation to separate the reaction mixture into the DMT cake and a mixture solution, and then the cake is distilled whereby high-purity DMT is recovered. The residual mixture solution is subjected to distillation treatment for recovery of the methanol, and the distillation residue is distilled to recover EG.Type: GrantFiled: April 19, 2002Date of Patent: March 16, 2004Assignee: Teijin LimitedInventors: Kenichi Ishihara, Kenji Ishida, Masanori Miyamoto, Minoru Nakashima, Kazuhiro Sato, Hideo Hasegawa