Patents by Inventor Satoru Fujitsu
Satoru Fujitsu 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: 9051234Abstract: Provided by the present invention is a method for producing an alkanediol, such as 1,5-pentanediol, with a high reaction selectivity thereto by reacting a cyclic ether group-containing methanol such as tetrahydrofurfuryl alcohol by using a non-chromium catalyst not containing chromium atom. More specifically, the method is to produce an alkanediol having hydroxy groups at both molecular terminals shown by the formula (2), includes reacting a cyclic ether group-containing methanol shown by the formula (1) with hydrogen in the presence of a metal catalyst which contains copper atom, at least one co-existing atom selected from the group consisting of elements of the third to the sixth periods of the II to XIV groups (excluding chromium) in the periodical table and lanthanide elements.Type: GrantFiled: November 19, 2012Date of Patent: June 9, 2015Assignee: UBE INDUSTRIES, LTD.Inventors: Yasutaka Yoshida, Kenji Hirotsu, Takashi Doi, Kouichi Kashiwagi, Ryo Fujimoto, Ryousuke Katsura, Satoru Fujitsu
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Patent number: 8940946Abstract: The present invention has an object to provide a method for efficiently producing high-purity 1,5-pentanediol by reacting tetrahydrofurfuryl alcohol with hydrogen. This manufacturing method for producing high-purity 1,5-pentanediol comprises: step (I): a step of obtaining a crude reaction product by a hydrogenolysis reaction of tetrahydrofurfuryl alcohol with hydrogen carried out in the presence of a copper-containing catalyst with reaction temperature of 200 to 350° C. and reaction pressure of 1 to 40 MPa until conversion rate of tetrahydrofurfuryl alcohol reaches 80% or less; step (II): a step of separating tetrahydrofurfuryl alcohol and crude 1,5-pentanediol (A) from the crude reaction product obtained in the step (I), and then, supplying recovered tetrahydrofurfuryl alcohol as a raw material for the step (I); and step (III): a step of obtaining the high-purity 1,5-pentanediol by distillation of the crude 1,5-pentanediol (A) obtained in the step (II).Type: GrantFiled: November 19, 2012Date of Patent: January 27, 2015Assignee: Ube Industries, Ltd.Inventors: Yasutaka Yoshida, Kenji Hirotsu, Ryo Fujimoto, Ryousuke Katsura, Satoru Fujitsu, Takashi Doi, Kouichi Kashiwagi
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Publication number: 20140309461Abstract: The present invention has an object to provide a method for efficiently producing high-purity 1,5-pentanediol by reacting tetrahydrofurfuryl alcohol with hydrogen. This manufacturing method for producing high-purity 1,5-pentanediol comprises: step (I): a step of obtaining a crude reaction product by a hydrogenolysis reaction of tetrahydrofurfuryl alcohol with hydrogen carried out in the presence of a copper-containing catalyst with reaction temperature of 200 to 350° C. and reaction pressure of 1 to 40 MPa until conversion rate of tetrahydrofurfuryl alcohol reaches 80% or less; step (II): a step of separating tetrahydrofurfuryl alcohol and crude 1,5-pentanediol (A) from the crude reaction product obtained in the step (I), and then, supplying recovered tetrahydrofurfuryl alcohol as a raw material for the step (I); and step (III): a step of obtaining the high-purity 1,5-pentanediol by distillation of the crude 1,5-pentanediol (A) obtained in the step (II).Type: ApplicationFiled: November 19, 2012Publication date: October 16, 2014Applicant: UBE INDUSTRIES, LTD.Inventors: Yasutaka Yoshida, Kenji Hirotsu, Ryo Fujimoto, Ryousuke Katsura, Satoru Fujitsu, Takashi Doi, Kouichi Kashiwagi
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Patent number: 8618335Abstract: An object of the present invention is to provide an industrially advantageous process for preparing a benzaldehyde compound from a benzyl alcohol compound with high yield. The present invention relates to a process for preparing an aromatic aldehyde compound represented by the formula (2); which comprises reacting an aromatic methyl alcohol compound represented by the formula (1); and a peroxide under a pH value of a reaction solution being pH 0.01 or higher and less than 10 in the presence of at least one metallic compound selected from a molybdenum compound and a tungsten compound, a quaternary ammonium salt and an organic phosphonium salt.Type: GrantFiled: October 6, 2009Date of Patent: December 31, 2013Assignee: Ube Industries Ltd.Inventors: Takashi Doi, Yoshihiro Yoshida, Shinji Yasuda, Yoshiyuki Watanabe, Satoru Fujitsu, Daisuke Douyama
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Patent number: 8450508Abstract: The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3]2-methyl-3-(3,4-methylenedioxyphenylpropanal having a content range from 50 to 3000 ppm of of 1-acetyl-3,4-methylenedioxybenzene.Type: GrantFiled: October 18, 2012Date of Patent: May 28, 2013Assignee: Ube Industries, Ltd.Inventors: Takashi Doi, Yoshihiro Yoshida, Eiji Sajiki, Satoru Fujitsu
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Publication number: 20130046101Abstract: The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3]2-methyl-3-(3,4-methylenedioxyphenylpropanal having a content range from 50 to 3000 ppm of of 1-acetyl-3,4-methylenedioxybenzene.Type: ApplicationFiled: October 18, 2012Publication date: February 21, 2013Inventors: Takashi DOI, Yoshihiro Yoshida, Eiji Sajiki, Satoru Fujitsu
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Patent number: 8344166Abstract: The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3] 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene.Type: GrantFiled: August 22, 2011Date of Patent: January 1, 2013Assignee: Ube Industries, Ltd.Inventors: Takashi Doi, Yoshihiro Yoshida, Eiji Sajiki, Satoru Fujitsu
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Patent number: 8338589Abstract: The present invention relates to a process for producing laurolactam from cyclododecanone oxime by liquid-phase rearrangement reaction using trichlorotriazine as a rearrangement catalyst. The present invention can provide a process which can solve the problem of termination of the reaction at a certain conversion, can prevent an inactive precipitate generated from trichlorotriazine from precipitating in the course of the reaction process, and can remove an inactive precipitate, an active intermediate and a residual catalyst.Type: GrantFiled: May 19, 2009Date of Patent: December 25, 2012Assignee: UBE Industries, Ltd.Inventors: Junichi Kugimoto, Nobuhiro Ii, Takashi Doi, Satoru Fujitsu, Tadashi Gotou, Hideo Shimomura, Ryouta Yasumatsu, Joji Kawai
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Publication number: 20120323021Abstract: An object of the present invention is to provide a high-purity aromatic methyl alcohol compound having reduced a bis(arylmethyl)ether compound as a side product mixed thereinto and a high-purity aromatic methyl alcohol composition having excellent preservation stability and methods for producing them. The object of the present invention is achieved by a method for producing a high-purity aromatic methyl alcohol compound, which comprises obtaining a high-purity aromatic methyl alcohol compound in high yield from an aromatic methyl alcohol-containing crude product by subjecting the crude product to distillation in the presence of an anti-decomposition agent. Further, the object for the preservation stability is achieved by producing a high-purity aromatic methyl alcohol composition using the obtained high-purity aromatic methyl alcohol compound.Type: ApplicationFiled: February 25, 2011Publication date: December 20, 2012Inventors: Takashi Doi, Yoshihiro Yoshida, Daisuke Douyama, Ryousuke Katsura, Satoru Fujitsu, Shinji Yasuda, Keisuke Kimura, Kiyoshi Oomori
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Patent number: 8168809Abstract: Disclosed are: (1) a method for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal, which comprises the step of providing a reaction mixture containing 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene by a process for reacting 1,2-methylenedioxybenzene with 2-methyl-3,3-diacetoxypropene or a process for reacting 1,2-methylenedioxybenzene, methacrolein and acetic anhydride with one another; subjecting the reaction mixture to hydrolysis or transesterification with an alcohol to provide a reaction mixture containing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; and purifying by distilling the reaction mixture, wherein a high boiling point compound contained in the reaction mixture is removed by a specific procedure; and (2) 2-methyl-3-(3,4-methylenedioxyphenyl)-propanal produced by the method, which has an acetic acid content of a less than 40 ppm, is useful as a perfume, and has a high purity.Type: GrantFiled: February 14, 2008Date of Patent: May 1, 2012Assignee: Ube Industries, Ltd.Inventors: Takashi Doi, Yoshihiro Yoshida, Eiji Sajiki, Satoru Fujitsu
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Publication number: 20120071672Abstract: An object of the present invention is to provide an industrially advantageous process for preparing a benzaldehyde compound from a benzyl alcohol compound with high yield. The present invention relates to a process for preparing an aromatic aldehyde compound represented by the formula (2); which comprises reacting an aromatic methyl alcohol compound represented by the formula (1); and a peroxide under a pH value of a reaction solution being pH 0.01 or higher and less than 10 in the presence of at least one metallic compound selected from a molybdenum compound and a tungsten compound, a quaternary ammonium salt and an organic phosphonium salt.Type: ApplicationFiled: October 6, 2009Publication date: March 22, 2012Inventors: Takashi Doi, Yoshihiro Yoshida, Shinji Yasuda, Yoshiyuki Watanabe, Satoru Fujitsu, Daisuke Douyama
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Publication number: 20110301361Abstract: The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3] 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene.Type: ApplicationFiled: August 22, 2011Publication date: December 8, 2011Applicant: UBE INDUSTRIES, LTD.Inventors: Takashi DOI, Yoshihiro YOSHIDA, Eiji SAJIKI, Satoru FUJITSU
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Patent number: 8039649Abstract: The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3] 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene.Type: GrantFiled: March 6, 2008Date of Patent: October 18, 2011Assignee: UBE Industries, Ltd.Inventors: Takashi Doi, Yoshihiro Yoshida, Eiji Sajiki, Satoru Fujitsu
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Publication number: 20110065913Abstract: The present invention relates to a process for producing laurolactam from cyclododecanone oxime by liquid-phase rearrangement reaction using trichlorotriazine as a rearrangement catalyst. The present invention can provide a process which can solve the problem of termination of the reaction at a certain conversion, can prevent an inactive precipitate generated from trichlorotriazine from precipitating in the course of the reaction process, and can remove an inactive precipitate, an active intermediate and a residual catalyst.Type: ApplicationFiled: May 19, 2009Publication date: March 17, 2011Applicant: UBE INDUSTRIES, LTD.Inventors: Junichi Kugimoto, Nobuhiro Ii, Takashi Doi, Satoru Fujitsu, Tadashi Gotou, Hideo Shimomura, Ryouta Yasumatsu, Joji Kawai
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Publication number: 20100121085Abstract: Disclosed are: (1) a method for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal, which comprises the step of providing a reaction mixture containing 1-acetoxy-2-methyl-3-(3,4-methylenedioxyphenyl)-1-propene by a process for reacting 1,2-methylenedioxybenzene with 2-methyl-3,3-diacetoxypropene or a process for reacting 1,2-methylenedioxybenzene, methacrolein and acetic anhydride with one another; subjecting the reaction mixture to hydrolysis or transesterification with an alcohol to provide a reaction mixture containing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; and purifying by distilling the reaction mixture, wherein a high boiling point compound contained in the reaction mixture is removed by a specific procedure; and (2) 2-methyl-3-(3,4-methylenedioxyphenyl)-propanal produced by the method, which has an acetic acid content of a less than 40 ppm, is useful as a perfume, and has a high purity.Type: ApplicationFiled: February 14, 2008Publication date: May 13, 2010Applicant: UBE INDUSTRIES, LTD.Inventors: Takashi Doi, Yoshihiro Yoshida, Eiji Sajiki, Satoru Fujitsu
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Publication number: 20100029541Abstract: The present invention relates to [1] a method for keeping a quality of 2-methyl-3-(3,4-methylenedioxyphenyl)propanal useful as a perfume, which comprises incorporating from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene in the 2-methyl-3-(3,4-methylenedioxyphenyl)propanal; [2] a process for producing 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene; and [3] 2-methyl-3-(3,4-methylenedioxyphenyl)propanal having a content range from 50 to 3000 ppm of 1-acetyl-3,4-methylenedioxybenzene.Type: ApplicationFiled: March 6, 2008Publication date: February 4, 2010Applicant: UBE Industries, Ltd.Inventors: Takashi Doi, Yoshihiro Yoshida, Eiji Sajiki, Satoru Fujitsu
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Patent number: 6018072Abstract: The present invention relates to a process for producing a diaryl oxalate, characterized in that an alkylaryl oxalate is subjected to a disproportionation reaction in the presence of a disproportionation catalyst, thereby to produce a diaryl oxalate while removing a by-product comprising a dialkyl oxalate.The production process of the present invention is advantageous in that the kinds of the by-products are fewer than that in conventional production process for diaryl oxalate, and thus can be practically utilized in industry, and the diaryl oxalates such as diphenyl oxalate, produced by the production process of the present invention are very important industrial materials for producing chemical products such as carbamates.Type: GrantFiled: August 7, 1997Date of Patent: January 25, 2000Assignee: Ube Industries, Ltd.Inventors: Keigo Nishihira, Shuji Tanaka, Yuki Nishida, Satoru Fujitsu
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Patent number: 5892091Abstract: A catalyst composed of an organic phosphorus compound having a trivalent or pentavalent phosphorus atom and at least one carbon-phosphorus bonding or a combination of the organic phosphorus compound and a halogen atom-containing compound is effective for decarbonylation, that is, for releasing carbon monoxide from a compound containing a moiety of --CO--CO--O-- in its molecular structure.Type: GrantFiled: July 8, 1997Date of Patent: April 6, 1999Assignee: Ube Industries, Ltd.Inventors: Katsumasa Harada, Yoichi Imbe, Keigo Nishihira, Shuji Tanaka, Satoru Fujitsu, Ryoji Sugise, Koichi Kashiwagi, Toshihiko Sumida, Takashi Doi, Masayuki Nishio
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Patent number: 5811573Abstract: A diaryl carbonate with a high degree of purity is produced at a high yield by (A) subjecting (a) a diaryl oxalate and a phenol compound or (b) an alkylaryl oxalate to transesterification reaction in one or two stages in the presence of a catalyst to prepare a diaryl oxalate, while removing a by-product from the reaction system; (B) collecting the diaryl oxalate from the resultant reaction product mixture of the step (A); (C) subjecting the diaryl oxalate to a decarbonylation reaction, preferably in the presence of a phosphorous compound-containing catalyst, to convert the diaryl oxalate to a corresponding diaryl carbonate, while removing a reaction by-product comprising carbon monoxide from the reaction system; and (D) collecting the diaryl carbonate from the reaction product mixture of the step (C).Type: GrantFiled: December 11, 1997Date of Patent: September 22, 1998Assignee: Ube Industries, Ltd.Inventors: Keigo Nishihira, Shuji Tanaka, Yuki Nishida, Ii Hirofumi, Satoru Fujitsu, Katsumasa Harada, Ryoji Sugise, Koichi Kashiwagi, Takashi Doi
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Patent number: 5731453Abstract: A diaryl carbonate with a high degree of purity is produced at a high yield by (A) subjecting (a) a diaryl oxalate and a phenol compound or (b) an alkylaryl oxalate to transesterification reaction in one or two stages in the presence of a catalyst to prepare a diaryl oxalate, while removing a by-product from the reaction system; (B) collecting the diaryl oxalate from the resultant reaction product mixture of the step (A); (C) subjecting the diaryl oxalate to a decarbonylation reaction, preferably in the presence of a phosphorous compound-containing catalyst, to convert the diaryl oxalate to a corresponding diaryl carbonate, while removing a reaction by-product comprising carbon monoxide from the reaction system; and (D) collecting the diaryl carbonate from the reaction product mixture of the step (C).Type: GrantFiled: March 10, 1997Date of Patent: March 24, 1998Assignee: Ube Industries, Ltd.Inventors: Keigo Nishihira, Shuji Tanaka, Yuki Nishida, Hirofumi Ii, Satoru Fujitsu, Katsumasa Harada, Ryoji Sugise, Koichi Kashiwagi, Takashi Doi