Nitrogen Containing Oxidant Patents (Class 562/420)
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Patent number: 9000212Abstract: Provided by the present invention is a method for efficient oxidation of alcohols by using, as a catalyst for dehydrogenation oxidation, a ruthenium complex which can be easily produced and easily handled and is obtainable at a relatively low cost. The invention relates to a method of producing a compound having a carbonyl group by dehydrogenation oxidation of alcohols by using as a catalyst the ruthenium carbonyl complex represented by the following general formula (1) RuXY(CO)(L) (1) (in the general formula (1), X and Y may be the same or different from each other and represent an anionic ligand, and L represents a tridentate aminodiphosphine ligand).Type: GrantFiled: April 18, 2012Date of Patent: April 7, 2015Assignee: Takasago International CorporationInventors: Taichiro Touge, Kunimori Aoki, Hideki Nara, Wataru Kuriyama
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Publication number: 20140303374Abstract: Provided by the present invention is a method for efficient oxidation of alcohols by using, as a catalyst for dehydrogenation oxidation, a ruthenium complex which can be easily produced and easily handled and is obtainable at a relatively low cost. The invention relates to a method of producing a compound having a carbonyl group by dehydrogenation oxidation of alcohols by using as a catalyst the ruthenium carbonyl complex represented by the following general formula (1) RuXY(CO)(L) (1) (in the general formula (1), X and Y may be the same or different from each other and represent an anionic ligand, and L represents a tridentate aminodiphosphine ligand).Type: ApplicationFiled: April 18, 2012Publication date: October 9, 2014Applicant: TAKASAGO INTERNATIONAL CORPORATIONInventors: Taichiro Touge, Kunimori Aoki, Hideki Nara, Wataru Kuriyama
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Polycarboxylic acid production system employing hot liquor removal downstream of oxidative digestion
Patent number: 7420082Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system includes an optimized post-digestion cooling stage that provides a TPA product having enhanced purity, while minimizing costs associated with removing impurities from recycled solvent.Type: GrantFiled: March 1, 2006Date of Patent: September 2, 2008Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Ronald Buford Sheppard, Martin De Boer -
Patent number: 6166072Abstract: Described herein are compounds having the general formula: ##STR1## wherein: Ar.sup.1 and Ar.sup.2 are independently selected aryl groups, optionally substituted with substituents selected from the group consisting of alkyl, cycloalkyl, alkoxy, alkanoyl, aralkyl, aralkyloxy, halo, NO.sub.2, Ph, CF.sub.3, CN, OH, methylenedioxy, ethylenedioxy, SO.sub.2 NRR', NRR', CO.sub.2 R (where R and R' are independently selected from the group consisting of H and alkyl) and a second aryl group, which may be substituted as above;wherein any cycloalkyl or aryl substituent is linked to Ar.sup.1 or Ar.sup.2 by a bridging element which may be a single bond, a vinylene group, an ethynylene group, a Z group, a --Z--(CH.sub.2).sub.n -- group, a --(CH.sub.2).sub.n --Z-- group, or a --Z--(CH.sub.2).sub.n --Z-- group, where Z represents an O atom, a S atom, an NH group or an N-alkyl group, and n is an integer from 1 to 4;wherein Ar.sup.1 and Ar.sup.Type: GrantFiled: June 29, 1999Date of Patent: December 26, 2000Assignee: Allelix Neuroscience, Inc.Inventors: Stanley Charles Bell, Michael De Vivo, Allen Hopper, Methvin Isaac, Anne O'Brien, Vassil Ilya Ognyanov, Richard Schumacher
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Patent number: 5608107Abstract: A process for preparing an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a resin-supported stable free radical nitroxide in the presence of a chlorine-containing oxidant and a solvent at a temperature in the range of from about 0.degree. C. to about 35.degree. C. and thereafter separating out the alkoxyalkanoic acid.Type: GrantFiled: May 31, 1995Date of Patent: March 4, 1997Assignee: Shell Oil CompanyInventors: Herbert E. Fried, David M. Singleton
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Patent number: 5481032Abstract: A process for the preparation of halogenated benzoic acids of formula (1): ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen, fluorine, chlorine or bromine atoms or C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.6 -alkoxy, nitro, cyano, trifluoromethyl, aidehyde, C.sub.1 -C.sub.4 -alkoxycarbonyl, -SO.sub.2 -C.sub.1 -C.sub.4 -alkyl, -SO.sub.2 -phenyl, -CONH.sub.2, -CON(C.sub.1 -C.sub.4 -alkyl).sub.2, hydroxy, carboxy, -NH.sub.2 or -N(C.sub.1 -C.sub.4 - alkyl).sub.2 groups, at least one of the substituents R.sub.1 -R.sub.5 being one of said halogen atoms, which comprises reacting 1 mol of a benzophenone, asymmetrically substituted on the benzene rings A and B, of general formula (2): ##STR2## in which R.sup.1 -R.sup.10 are as defined above for R.sub.1 -R.sub.Type: GrantFiled: November 29, 1993Date of Patent: January 2, 1996Assignee: Hoechst AktiengesellschaftInventor: Ralf Pfirmann
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Patent number: 5401874Abstract: A process for preparing an alkoxyalkanoic acid by reacting the corresponding alkoxyalkanol with a stable free radical nitroxide in the presence of a NO.sub.x -generating compound and, optionally, an oxidant at a temperature in the range of from about 0.degree. C. to about 100.degree. C. and thereafter separating out the alkoxyalkanoic acid.Type: GrantFiled: June 21, 1994Date of Patent: March 28, 1995Assignee: Shell Oil CompanyInventor: Herbert E. Fried
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Patent number: 5387712Abstract: A process for the preparation of an aromatic alkoxyalkanoic acid by reacting the corresponding aromatic alkoxyalkanol with a stable free radical nitroxide in the presence of a NO.sub.x -generating compound and an oxidant at a temperature in the range of from about 0.degree. C. to about 100.degree. C. and thereafter separating out the aromatic alkoxyalkanoic acid.Type: GrantFiled: January 26, 1994Date of Patent: February 7, 1995Assignee: Shell Oil CompanyInventor: Herbert E. Fried
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Patent number: 5371284Abstract: Phenyl acetylenic acetals and thioacetals and their use in the treatment of allergy, asthma, inflammation, arthritis, hyperproliferative skin disease, psoriasis or contact dermatitis are disclosed. Also disclosed are intermediates useful for producing said phenyl acetylenic acetals and thioacetals.Type: GrantFiled: July 23, 1993Date of Patent: December 6, 1994Assignee: Schering CorporationInventors: Richard J. Friary, Michael J. Green, Anil K. Saksena, Vera A. Seidl
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Patent number: 4845279Abstract: An isomer mixture of 4-trifluoromethyl-2-nitrobenzoic acid and 4-trifluoromethyl-3-nitrobenzoic acid, which is a novel compound, is obtained by nitrating a compound represented by ##STR1## (Z is COY or CY.sub.3, and Y is a halogen atom) with a nitrating agent comprising nitric acid and simultaneously hydrolyzing the radical Z. Each of the two isomers is easily isolated by treating the mixture with a basic neutralizing agent to obtain a solution containing the 2-nitro isomer and a precipitate containing the 3-nitro isomer.Type: GrantFiled: December 22, 1987Date of Patent: July 4, 1989Assignee: Central Glass Company, LimitedInventors: Yasunori Nishimura, Yoshihiko Gotoh, Toshikazu Kawai
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Patent number: 4323700Abstract: A process is described for preparing benzophenone derivatives of a high purity in an extremely high yield from 3-phenylphthalide derivatives with the use of at least one oxidizing agent.Type: GrantFiled: September 6, 1979Date of Patent: April 6, 1982Assignee: Kanzaki Paper Manufacturing Co., Ltd.Inventors: Mitsuru Kondo, Hiroshi Iwasaki, Kiyoshi Yasui, Makoto Miyake