Formation Of Carboxyl Group By Oxidation Patents (Class 562/407)
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Patent number: 11859145Abstract: An improved alkaline pretreatment of biomass is provided that is a single-stage, two oxidant alkaline oxidative pretreatment process. The process uses a homogenous catalyst with at least two oxidants (Hydrogen peroxide and enhanced levels of oxygen) in an alkaline environment to catalytically pretreat lignocellulosic biomass in a single-stage oxidation reaction. The provided single-stage alkaline-oxidative pretreatment improves biomass pretreatment and increase enzymatic digestibility to improve the economic feasibility of production of lignocellulose derived sugars.Type: GrantFiled: August 29, 2022Date of Patent: January 2, 2024Assignees: Board of Trustees of Michigan State University, Montana State University, Wisconsin Alumni Research FoundationInventors: Eric L. Hegg, Zhaoyang Yuan, David B. Hodge, Shannon S. Stahl, Bryan D. Bals
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Patent number: 9919993Abstract: The present invention provides a process for preparation of {(2E,4E,6E,8E)-9-(4-methoxy-2,3,6-trimethyl)phenyl-3,7-dimethyl-nona-2,4,6,8}tetraenoate, an acitretin intermediate of formula (VI) with trans isomer ?97%, comprising of reacting 3-formyl-crotonic acid butyl ester of formula (V), substantially free of impurities, with 5-(4-methoxy-2,3,6-trimethylphenyl)-3-methyl-penta-2,4-diene-1-triphenyl phosphonium bromide of formula (IV) and isolating resultant compound of formula (VI), treating the filtrate with iodine for isomerization of the undesired cis intermediate and finally obtaining acitretin (I), with desired trans isomer ?97%.Type: GrantFiled: September 8, 2015Date of Patent: March 20, 2018Assignee: Emcure Pharmaceuticals LimitedInventors: Mukund Keshav Gurjar, Shashikant Gangaram Joshi, Sachin Arvind Badhe, Mangesh Gorakhanath Kamble, Samit Satish Mehta
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Patent number: 9040746Abstract: Various embodiments of the present invention generally disclose systems and processes for the conversion of a feed stream comprising at least one C8 aromatic into a product stream comprising isophthalic acid and purified terephthalic acid (IPA/TA).Type: GrantFiled: March 18, 2009Date of Patent: May 26, 2015Assignee: GTC Technology US, LLCInventors: George A. Ball, Joseph G. Gentry, Joseph P. Weller, Zhongyi Ding, Weihua Jin
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Patent number: 8968686Abstract: Disclosed are process and apparatus for vertical splitting of the oxygen supply to a post-oxidation reactor. Further disclosed are process and apparatus for supplying reaction medium to a post-oxidation reactor at a mid-level inlet. Such apparatus and process can assist in reducing oxygen pinch throughout the post-oxidation reactor.Type: GrantFiled: December 1, 2010Date of Patent: March 3, 2015Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Ashfaq Shaikh, Alan George Wonders
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Patent number: 8946470Abstract: A one-pot method for the oxidative cleavage of unsaturated carbon-carbon bonds to provide a carboxylic acid or a ketone-containing compound is disclosed.Type: GrantFiled: July 21, 2011Date of Patent: February 3, 2015Assignee: Catexel LimitedInventors: Ronald Hage, Johannes Wietse De Boer, Pattama Saisaha
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Patent number: 8940255Abstract: Disclosed are process and apparatus for vertical splitting of the oxygen supply to a post-oxidation reactor. Further disclosed are process and apparatus for supplying reaction medium to a post-oxidation reactor at a mid-level inlet. Such apparatus and process can assist in reducing oxygen pinch throughout the post-oxidation reactor.Type: GrantFiled: December 1, 2010Date of Patent: January 27, 2015Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Ashfaq Shaikh, Alan George Wonders
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Patent number: 8936767Abstract: Disclosed are process and apparatus for vertical splitting of the oxygen supply to a post-oxidation reactor. Further disclosed are process and apparatus for supplying reaction medium to a post-oxidation reactor at a mid-level inlet. Such apparatus and process can assist in reducing oxygen pinch throughout the post-oxidation reactor.Type: GrantFiled: December 1, 2010Date of Patent: January 20, 2015Assignee: Grupo Petrotemex. S.A. DE C.V.Inventors: Ashfaq Shaikh, Alan George Wonders, David Lange
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Patent number: 8779185Abstract: A process and apparatus for manufacture of aromatic carboxylic acids comprises a liquid phase oxidation of aromatic hydrocarbon feed materials and treatment of a high pressure off-gas from the liquid phase oxidation to separate water and reaction solvent and purification of impure aromatic carboxylic acid products wherein a purification liquid includes water from off-gas treatment.Type: GrantFiled: May 7, 2012Date of Patent: July 15, 2014Assignee: BP Corporation North America Inc.Inventor: Thomas M. Bartos
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Patent number: 8624055Abstract: Catalytic compositions for conversion of substituted aromatic feed materials to oxidized products comprising aromatic carboxylic acid derivatives of the substituted aromatic feed materials comprise solid particles comprising palladium in combination with at least one of antimony, bismuth and gold, and optionally, an additional metal or metalloid component effective to promote activity or selectivity of the palladium and antimony, bismuth or gold for oxidation to aromatic carboxylic acids. A process for oxidizing substituted aromatic feed materials comprises contacting the feed material with oxygen in the presence of such catalytic compositions in a liquid reaction mixture.Type: GrantFiled: May 1, 2008Date of Patent: January 7, 2014Assignee: BP Corporation North America Inc.Inventors: Wayne P. Schammel, Bradley J. Huggins, Matthew A. Kulzick, Philip O. Nubel, Bryan M. Rabatic, Chengxiang Zhou, Victor A. Adamian, William H. Gong, Peter D. Metelski, Jeffrey T. Miller
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Publication number: 20130310601Abstract: The invention relates to processes for converting hydrocarbons to phthalic acids such as terephthalic acid. The invention also relates to polymerizing phthalic acid derivatives to produce, e.g., synthetic fibers.Type: ApplicationFiled: April 18, 2013Publication date: November 21, 2013Applicant: ExxonMobil Chemical Patents Inc.Inventors: Gary D. MOHR, Paul F. KEUSENKOTHEN, Frank HERSHKOWITZ, Jonathan M. MCCONNACHIE
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Publication number: 20130153855Abstract: A process comprises combining a Ce (IV) salt with a carbon material comprising CNT or graphene wherein the Ce (IV) salt is selected from a Ce (IV) ammonium salt of a nitrogen oxide acid and is dissolved in a solvent comprising water. The process is conducted under conditions to substantially oxidize the carbon material to produce an oxidized material that is substantially non-conducting. After the oxidation, the Ce (IV) is substantially removed from the oxidized material. This produces a product made by the process. An article of manufacture comprises the product on a substrate. The oxidized material can be formed as a pattern on the substrate. In another embodiment the substrate comprises an electronic device with the oxidized material patterning non-conductive areas separate from conductive areas of the non-oxidized carbon material, where the conductive areas are operatively associated with the device.Type: ApplicationFiled: December 16, 2011Publication date: June 20, 2013Applicant: International Business Machines CorporationInventors: Ali Afzali-Ardakani, Bhupesh Chandra, George S. Tulevski
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Patent number: 8404741Abstract: The present disclosure is generally directed to compounds that can inhibit DAGL? and/or ? activity, compositions comprising such compounds, and methods for inhibiting DAGL? and/or ? activity.Type: GrantFiled: February 11, 2011Date of Patent: March 26, 2013Assignee: Bristol-Myers Squibb CompanyInventors: Louis S. Chupak, Xiaofan Zheng, Min Ding, Shuanghua Hu, Yazhong Huang, Robert G. Gentles
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Patent number: 8383837Abstract: The invention relates to a process for the catalytic conversion of a carbohydrate, an alcohol, an aldehyde or a polyhydroxy compound in the presence of a catalyst containing gold in a solvent.Type: GrantFiled: June 5, 2008Date of Patent: February 26, 2013Assignee: DSM IP Assets B.V.Inventors: Werner Bonrath, Jocelyn Fischesser
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Patent number: 8188309Abstract: The present invention relates to a process for making terephthalic acid by reacting a starting material and oxygen in the presence of a heterogeneous catalyst and p-xylene as solvent to produce a solution of terephthalic acid (TPA). The starting material is p-xylene, p-toluic acid, 4 carboxybenzaldehyde, or a mixture of any two or more thereof. No solid TPA is formed during the reaction in contrast to previous manufacturing methods that utilize acidic solvents and precipitate TPA as it forms. By avoiding the direct precipitation of TPA during formation, the present methods avoid many shortcomings of the conventional manufacturing methods used to produce TPA. In particular, the present methods do not require additional purification steps to remove reaction byproducts; film grade TPA can be obtained directly from starting material in a one-step process.Type: GrantFiled: December 20, 2005Date of Patent: May 29, 2012Assignee: Process Design Center B.V.Inventors: Johannes Maria Franciscus Sijben, Herman Jozef Claudius De Meyer
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Patent number: 8178716Abstract: The present invention relates to a multi-stage crystallization process which comprises the steps of feeding a solution of terephthalic acid or a slurry (raw slurry) containing terephthalic acid partially precipitated to a first crystallization vessel to precipitate the terephthalic acid therein; and feeding a slurry (crystallization slurry) containing the thus precipitated terephthalic acid sequentially to second and subsequent crystallization vessels, wherein while continuously supplying a cleaning solvent to a delivery conduit connecting the former-stage crystallization vessel and the next latter-stage crystallization vessel to each other, the crystallization slurry is fed through the delivery conduit.Type: GrantFiled: May 2, 2007Date of Patent: May 15, 2012Assignees: Mitsubishi Gas Chemical Company, Inc., Toyobo Co., Ltd., Mizushima Aroma Company, Ltd.Inventors: Fumiya Zaima, Nirou Hoshishima
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Patent number: 8173834Abstract: A process and apparatus for manufacture of aromatic carboxylic acids comprises a liquid phase oxidation of aromatic hydrocarbon feed materials and treatment of a high pressure off-gas from the liquid phase oxidation to separate water and reaction solvent and purification of impure aromatic carboxylic acid products wherein a purification liquid includes water from off-gas treatment.Type: GrantFiled: March 20, 2006Date of Patent: May 8, 2012Assignee: BP Corporation North America Inc.Inventor: Thomas M. Bartos
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Patent number: 8173836Abstract: Disclosed is a method and apparatus for drying a wet cake in a carboxylic acid production process. The method comprises employing a contact dryer for drying solid particles of carboxylic acid, where the solid particles can have a residence time of less than about 7 minutes in the dryer and an exit temperature of less than about 250° C. upon exiting the dryer.Type: GrantFiled: February 1, 2007Date of Patent: May 8, 2012Assignee: Grupo Petrotemex, S.A. De C.V.Inventors: Kenny Randolph Parker, Philip Edward Gibson
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Patent number: 8173835Abstract: Disclosed is a method and apparatus for drying a wet cake in a carboxylic acid production process. The method comprises employing a contact dryer for drying solid particles of carboxylic acid, where the solid particles can have a residence time of less than about 7 minutes in the dryer and an exit temperature of less than about 250° C. upon exiting the dryer.Type: GrantFiled: February 1, 2007Date of Patent: May 8, 2012Assignee: Grupo Petrotemex, S.A. DE C.V.Inventors: Kenny Randolph Parker, Philip Edward Gibson
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Publication number: 20120107886Abstract: Provided herein is a method of oxidizing lignin. Further disclosed herein are aromatic and non-aromatic compounds obtained from oxidized lignin.Type: ApplicationFiled: June 1, 2010Publication date: May 3, 2012Applicant: Strategic Enzyme Applications, Inc.Inventors: Kim Albizati, Cara Tracewell
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Patent number: 8168819Abstract: The present invention provides an industrially advantageous process for producing 5-phenylisophthalic acid, which process attains excellent selectivity and yield and also realizes recovery and reuse of a catalyst. The process for producing 5-phenylisophthalic acid represented by formula (1) is characterized in that the process includes the following steps (A) to (C): (A) reacting m-xylene with cyclohexene in the presence of hydrogen fluoride and boron trifluoride, to thereby produce 1-cyclohexyl-3,5-dimethylbenzene; (B) dehydrogenating the 1-cyclohexyl-3,5-dimethylbenzene produced in step (A) in the presence of a dehydrogenation catalyst, to thereby produce 3,5-dimethylbiphenyl; and (C) dissolving the 3,5-dimethylbiphenyl produced in step (B) in a solvent and oxidizing the 3,5-dimethylbiphenyl in the co-presence of an oxidation catalyst, to thereby produce 5-phenylisophthalic acid.Type: GrantFiled: April 4, 2007Date of Patent: May 1, 2012Assignee: Mitsubishi Gas Chemical Company, Inc.Inventor: Junya Nishiuchi
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Patent number: 8163954Abstract: Catalytic compositions for conversion of substituted aromatic feed materials to oxidized products comprising aromatic carboxylic acid derivatives of the substituted aromatic feed materials comprise a combination comprising a palladium component, an antimony component and/or a bismuth component, and one or more Group 4, 5, 6 or 14 metal or metalloid components. A process for oxidizing substituted aromatic feed materials comprises contacting the feed material with oxygen in the presence of such a catalytic composition in a liquid reaction mixture.Type: GrantFiled: May 4, 2007Date of Patent: April 24, 2012Assignee: BP Corporation North America Inc.Inventors: Wayne P. Schammel, Victor Adamian, Stephen P. Brugge, William H. Gong, Peter D. Metelski, Philip O. Nubel, Chengxiang Zhou
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Patent number: 8115029Abstract: Oxidations of hydrocarbons, cycloalkanes and alkenes, arylalkanes, and a variety of other organic substrates are accomplished by cobalt-N-hydroxysuccinimide co-catalyzed reactions with dioxygen under unusually mild, near ambient conditions of temperature and pressure. The improved safety of the oxidation method and the high yields of product obtained make use of a unique combination of cobalt (II) complexes with N-hydroxysuccinimide. These autoxidation reactions do not have prolonged initiation times. Many of these reactions can be safely performed under normal chemical laboratory conditions and do not require specialized equipment or reagents.Type: GrantFiled: November 2, 2007Date of Patent: February 14, 2012Assignee: University of KansasInventors: Richard S. Givens, Chi Cheng Ma, Daryle H. Busch, Bala Subramaniam, Bhuma Rajagopalan
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Patent number: 8080685Abstract: A method for producing benzoic acid or a methylbenzoic acid isomer is disclosed which comprises forming a dispersion comprising oxygen-containing gas bubbles dispersed in either toluene or an xylene isomer, wherein the bubbles have a mean diameter less than 1 micron. The dispersion is then subjected to reaction conditions comprising a pressure of less than about 1013 kPa and a temperature of less than about 160° C., whereby at least a portion of the toluene or xylene isomer is partially oxidized to form benzoic acid or the corresponding methylbenzoic acid isomer, respectively. In some embodiments, the methylbenzoic acid isomer is an intermediate compound, and the method further includes subjecting any unreacted xylene isomer and the intermediate compound to further oxidization, to form 1,2-benzenedicarboxylic acid, 1,3-benzenedicarboxylic acid, or 1,4-benzenedicarboxylic acid. A system of apparatus for performing the method is also disclosed.Type: GrantFiled: June 12, 2008Date of Patent: December 20, 2011Assignee: H R D CorporationInventors: Abbas Hassan, Ebrahim Bagherzadeh, Rayford G. Anthony, Gregory Borsinger, Aziz Hassan
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Patent number: 8053597Abstract: A process is provided for producing an enriched carboxylic acid compositions produced by contacting composition comprising a carboxylic acid with an enrichment feed in an enrichment zone to form an enriched carboxylic acid composition. This invention also relates to a process and the resulting compositions for removing catalyst from a carboxylic acid composition to produce a post catalyst removal composition.Type: GrantFiled: June 26, 2009Date of Patent: November 8, 2011Assignee: Grupo Petrotemex, S.A. DE C.V.Inventors: Philip Edward Gibson, Kenny Randolph Parker, Ronald Buford Sheppard
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Patent number: 7977505Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: April 18, 2008Date of Patent: July 12, 2011Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede, Puneet Gupta
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Publication number: 20110166368Abstract: A process for recovering solid reaction products during partial oxidation of hydrocarbons in a liquid solvent as a reaction medium by multi-stage evaporative crystallization includes determining a final temperature of the multi-stage evaporative crystallization based on a melting point of the solvent. The pressure and temperature of the solvent is reduced in steps via successive crystallization stages until the final temperature is reached. Each of the crystallization stages includes a compressor configured to perform the reducing of the pressure and to withdraw vapors formed. The vapors from the compressor of a lower expansion pressure crystallization stage are introduced into a vapor discharge conduit of a next successive higher expansion pressure crystallization stage upstream of the compressor of the higher expansion pressure crystallization stage.Type: ApplicationFiled: August 13, 2009Publication date: July 7, 2011Applicant: LURGI GMBHInventors: Thomas Gutermuth, Robert Szabo
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Patent number: 7960581Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: July 29, 2010Date of Patent: June 14, 2011Assignee: Grupo Petrotemex, S.A. de C.V.Inventors: Marcel de Vreede, Alan George Wonders, Robert Lin
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Patent number: 7910071Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: August 27, 2009Date of Patent: March 22, 2011Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Howard Wood Jenkins, Jr., Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
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Patent number: 7910769Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: March 22, 2011Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Puneet Gupta, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
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Patent number: 7902396Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 24, 2009Date of Patent: March 8, 2011Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Gino Georges Lavoie, Charles Edwan Sumner, Jr.
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Patent number: 7897810Abstract: Disclosed is an optimized process and apparatus for more efficiently producing aromatic dicarboxylic acids (e.g., terephthalic acid). In one embodiment the process/apparatus reduces costs by recovering and purifying residual terephthalic acid present in the liquid phase of an initial oxidation slurry. In another embodiment the process apparatus reduces costs associated with hydrogenation by forming a final composite product containing unhydrogenated acid particles.Type: GrantFiled: March 18, 2008Date of Patent: March 1, 2011Assignee: Eastman Chemical CompanyInventors: Robert Lin, Marcel de Vreede
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Patent number: 7888530Abstract: Disclosed is an optimized process and apparatus for more efficiently producing aromatic dicarboxylic acids (e.g., terephthalic acid). In one embodiment the process/apparatus reduces costs by recovering and purifying residual terephthalic acid present in the liquid phase of an initial oxidation slurry. In another embodiment the process apparatus reduces costs associated with hydrogenation by forming a final composite product containing unhydrogenated acid particles.Type: GrantFiled: July 14, 2005Date of Patent: February 15, 2011Assignee: Eastman Chemical CompanyInventors: Robert Lin, Marcel de Vreede
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Patent number: 7884232Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: March 1, 2006Date of Patent: February 8, 2011Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Thomas Young Lightfoot, Thomas Earl Woodruff, Charles Helton Hitchcock, David Lee Denton, Carl Norman McCurry
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Publication number: 20110028752Abstract: A bis(formylphenyl) compound expressed by general formula (1) is manufactured by, for example, using a corresponding bis(hydroxy-formylphenyl) compound as the direct material and causing it to react with a halogenated alkoxycarbonyl hydrocarbon in the presence of a base according to a known phenylether manufacturing method.Type: ApplicationFiled: November 7, 2008Publication date: February 3, 2011Applicant: HONSHU CHEMICAL INDUSTRY CO., LTD.Inventors: Akira Yoshitomo, Tatsuya Iwai
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Publication number: 20100234550Abstract: In this disclosure, a system is described, comprising a shear device with at least one inlet and at least one outlet and a mixing vessel with at least one inlet and at least one outlet, wherein an inlet of the shear device is in fluid communication with an outlet of the mixing vessel. In certain embodiments, the shear device and the mixing vessel form a loop for fluid communication. Also disclosed herein is a method of high shear oxidation, comprising mixing an oxidant with a substrate to form a substrate-oxidant mixture and applying shear to the substrate-oxidant mixture to form a product. The product includes ethylene oxide, propylene oxide, terephthalic acid, phenol, acrylonitrile, maleic anhydride, phthalic anhydride, nitric acid, caprolactam, oxidized polyethylene, oxidized polypropylene, oxidized polyethylene copolymers, and oxidized polypropylene copolymers. Suitable oxidant includes air, oxygen, ozone, peroxide, organic peroxide, halogen, oxygen-containing gas, and halogen-containing gas.Type: ApplicationFiled: December 14, 2009Publication date: September 16, 2010Applicant: H R D CORPORATIONInventors: Abbas Hassan, Harshad M. Bhatt, Aziz Hassan, Gregory G. Borsinger
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Patent number: 7692037Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: April 6, 2010Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Marcel de Vreede, Lee Reynolds Partin, Wayne Scott Strasser
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Patent number: 7683210Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: March 23, 2010Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Thomas Young Lightfoot, Thomas Earl Woodruff, Charles Helton Hitchcock, David Lee Denton, Carl Norman McCurry
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Carboxylic Acid Production Process Employing Solvent from Esterification of Lignocellulosic Material
Publication number: 20090275777Abstract: Methods and apparatus for producing a carboxylic acid employing a solvent from esterification of lignocellulosic materials. An acid-containing composition from esterification of lignocellulosic materials can be employed in the oxidation of para-xylene to terephthalic acid. The acid-containing composition can comprise acetic acid, acetic anhydride, and one or more terpenes.Type: ApplicationFiled: January 7, 2009Publication date: November 5, 2009Applicant: Eastman Chemical CompanyInventors: Wout Fornara, Martin Gout, Charles Edwan Sumner, JR. -
Patent number: 7608733Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: October 27, 2009Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Howard Wood Jenkins, Jr., Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
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Patent number: 7572936Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: August 11, 2009Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
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Patent number: 7568361Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: August 4, 2009Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Robert Lin, Marcel de Vreede, Lee Reynolds Partin
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Patent number: 7534912Abstract: A process for producing pyromellitic acid which comprises step A for oxidizing durene, thereby obtaining a reaction mixture comprising trimethyl benzoic acid, trimethyl benzyl alcohol and trimethyl benzaldehyde, step B for separating trimethyl benzoic acid, trimethyl benzaldehyde and trimethyl benzyl alcohol from the reaction mixture obtained in step A, and step C for oxidizing trimethyl benzoic acid and/or trimethyl benzaldehyde separated in step B, thereby obtaining pyromellitic acid.Type: GrantFiled: October 18, 2004Date of Patent: May 19, 2009Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Shinichi Nagao, Hiroshi Ogawa
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Publication number: 20090124827Abstract: A process for preparing tetracarboxylic acids of the general formula I or salts thereof, wherein at least one compound of the general formula II a or II b (a) is first reacted with at least one epoxidation reagent and (b) then oxidized with nitric acid or at least one nitrogen oxide, where the variables are defined as follows: R1, R2 are the same or different and are selected from hydrogen, phenyl and C1-C10-alkyl.Type: ApplicationFiled: April 27, 2006Publication date: May 14, 2009Applicant: BASF AktiengesellschaftInventors: Kai Gumlich, Joaquim Henrique Teles
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Patent number: 7507857Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: March 24, 2009Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede, Puneet Gupta
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Patent number: 7504535Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: March 17, 2009Assignee: Eastman Chemical CompanyInventors: Marcel de Vreede, Alan George Wonders, Robert Lin
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Patent number: 7501537Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system minimizes or eliminates the need for liquor exchange upstream of oxidative digestion and/or upstream of substantial cooling of the TPA-containing slurry.Type: GrantFiled: March 1, 2006Date of Patent: March 10, 2009Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Ronald Buford Sheppard, Martin De Boer, Raymond Elbert Fogle, Marcel de Vreede
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Patent number: 7495125Abstract: Disclosed is an optimized process and apparatus for more efficiently and economically carrying out the liquid-phase oxidation of an oxidizable compound. Such liquid-phase oxidation is carried out in a bubble column reactor that provides for a highly efficient reaction at relatively low temperatures. When the oxidized compound is para-xylene and the product from the oxidation reaction is crude terephthalic acid (CTA), such CTA product can be purified and separated by more economical techniques than could be employed if the CTA were formed by a conventional high-temperature oxidation process.Type: GrantFiled: June 16, 2005Date of Patent: February 24, 2009Assignee: Eastman Chemical CompanyInventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
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Patent number: 7488843Abstract: Methylene substituted aromatic compounds can be oxidized using t-butyl hydroperoxide and microwave radiation. In particular, xylenes give primarily phthalic acids, while toluene gives benzoic acid. Other methylene substituted aromatic compounds where the methylene group is not part of a methyl group give ketones, rather than acids. For example, fluorene gives fluorenone. The process avoids the need for the presence of metals such as in catalysts or in oxidizing agents, and can be carried out using water rather than an organic solvent. Thus the process can conform with the ideals of green chemistry.Type: GrantFiled: October 31, 2007Date of Patent: February 10, 2009Assignee: Hong Kong Baptist UniversityInventors: Albert Wai Ming Lee, Hao He
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Publication number: 20090030230Abstract: The invention relates to mixed oxide catalysts for the catalytic gas-phase oxidation of olefins and methylated aromatics, processes for producing the catalysts and the reaction with air or oxygen in the presence of inert gases in various ratios at elevated temperatures and pressure to form aldehydes and carboxylic acids.Type: ApplicationFiled: September 15, 2006Publication date: January 29, 2009Inventors: Achim Fischer, Werner Burkhardt, Christoph Weckbecker, Klaus Huthmacher, Frank Wilz
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Patent number: 7456218Abstract: The present invention provides a novel compound represented by the formula (I) wherein each symbol is as defined in the specification, a salt thereof and a prodrug thereof having a superior GPR40 receptor function modulating action, which can be used as an insulin secretagogue, an agent for the prophylaxis or treatment of diabetes and the like. They unexpectedly show superior GPR40 receptor agonist activity, and also show superior properties as a pharmaceutical product, such as stability and the like. Thus, they can be safe and useful pharmaceutical agents for the prophylaxis or treatment of GPR40 receptor related diseases in mammals.Type: GrantFiled: December 24, 2004Date of Patent: November 25, 2008Assignee: Takeda Pharmaceutical Company LimitedInventors: Tsuneo Yasuma, Shuji Kitamura, Nobuyuki Negoro