Air, Oxygen, Or Ozone Oxidant Patents (Class 562/412)
  • Publication number: 20120004451
    Abstract: A process for producing terephthalic acid from para-xylene. The process comprises forming a mixture comprising the para-xylene, a solvent, a bromine source, a catalyst, and ammonium acetate; and oxidizing the para-xylene by contacting the mixture with an oxidizing agent at oxidizing conditions to produce a solid oxidation product comprising terephthalic acid, para-toluic acid, 4-carboxybenzaldehyde. The solvent comprises a carboxylic acid having from 1 to 7 carbon atoms, and the catalyst comprises at least one of cobalt, titanium, manganese, chromium, copper, nickel, vanadium, iron, molybdenum, tin, cerium, and zirconium.
    Type: Application
    Filed: June 8, 2011
    Publication date: January 5, 2012
    Applicant: UOP LLC
    Inventors: Alakananda Bhattacharyya, Joel T. Walenga
  • Patent number: 8084639
    Abstract: A method of reducing or eliminating inflow of water to a dehydration tower using steam for separating water from a carboxylic acid from a reactor outlet gas produced in a reactor during oxidation of an aromatic compound in a carboxylic acid solvent to produce an aromatic acid, for example, oxidation of p-xylene in acetic acid solvent to produce terepthalic acid. The aromatic compound is introduced at the top of an absorption tower and collects ascending carboxylic acid solvent, introduced in the reactor outlet gas at the bottom of the absorption tower, for reintroduction into the reactor eliminating the need to remove and recover the solvent. The absorption tower, condensers and an organic-water separator remove the water in the reactor outlet gas as waste water, and the amount of water inflow to the dehydration tower is reduced or eliminated, as is the amount of steam required for separation.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: December 27, 2011
    Assignees: Amtpacific Co., Ltd.
    Inventor: Ki Joon Kang
  • Patent number: 8080685
    Abstract: 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: Grant
    Filed: June 12, 2008
    Date of Patent: December 20, 2011
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Ebrahim Bagherzadeh, Rayford G. Anthony, Gregory Borsinger, Aziz Hassan
  • Patent number: 8053597
    Abstract: 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: Grant
    Filed: June 26, 2009
    Date of Patent: November 8, 2011
    Assignee: Grupo Petrotemex, S.A. DE C.V.
    Inventors: Philip Edward Gibson, Kenny Randolph Parker, Ronald Buford Sheppard
  • Patent number: 8026403
    Abstract: A method for producing a product comprising at least one selected from C2+ hydrocarbons, oxygenates, and combinations thereof from light gas comprising one or more of carbon dioxide, methane, ethane, propane, butane, pentane, and methanol by forming a dispersion of light gas in a liquid feed, wherein the dispersion is formed at least in part with high shear forces and wherein at least one of the liquid feed and the light gas is a hydrogen source. A system for carrying out the method is also presented.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: September 27, 2011
    Inventors: Abbas Hassan, Ebrahim Bagherzadeh, Rayford G. Anthony, Gregory Borsinger, Aziz Hassan
  • Patent number: 7977505
    Abstract: 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: Grant
    Filed: April 18, 2008
    Date of Patent: July 12, 2011
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede, Puneet Gupta
  • Patent number: 7959879
    Abstract: 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: Grant
    Filed: March 18, 2008
    Date of Patent: June 14, 2011
    Assignee: Grupo Petrotemex, S.A. de C.V.
    Inventors: Robert Lin, Marcel de Vreede
  • Patent number: 7960581
    Abstract: 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: Grant
    Filed: July 29, 2010
    Date of Patent: June 14, 2011
    Assignee: Grupo Petrotemex, S.A. de C.V.
    Inventors: Marcel de Vreede, Alan George Wonders, Robert Lin
  • Patent number: 7956215
    Abstract: Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus providing flexibility in the treatment and use of such oxidation byproducts.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: June 7, 2011
    Assignee: Grupo Petrotemex, S.A. de C.V.
    Inventors: Philip Edward Gibson, Kenny Randolph Parker
  • Patent number: 7935845
    Abstract: 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 preferentially apportion liquid phase oxidation by-product species between gas and liquid phase resulting from separation. Processes for making pure forms of aromatic carboxylic acid also are included.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: May 3, 2011
    Assignee: BP Corporation North America Inc.
    Inventors: Thomas M. Bartos, Linus K. Leung
  • Publication number: 20110087000
    Abstract: The present invention is directed to a method for preparing renewable and relatively high purity p-xylene from biomass. For example, biomass treated to provide a fermentation feedstock is fermented with a microorganism capable of producing a C4 alcohol such as isobutanol, then sequentially dehydrating the isobutanol in the presence of a dehydration catalyst to provide a C4 alkene such as isobutylene, dimerizing the C4 alkene to a form one or more C8 alkenes such as 2,4,4-trimethylpentenes or 2,5-dimethylhexene, then dehydrocyclizing the C8 alkenes in the presence of a dehydrocyclization catalyst to selectively form renewable p-xylene in high overall yield. The p-xylene can then be oxidized to form terephthalic acid or terephthalate esters.
    Type: Application
    Filed: October 6, 2010
    Publication date: April 14, 2011
    Applicant: GEVO, Inc.
    Inventors: Matthew W. Peters, Joshua D. Taylor, Madeline Jenni, Leo E. Manzer, David E. Henton
  • Patent number: 7919652
    Abstract: 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: Grant
    Filed: March 1, 2006
    Date of Patent: April 5, 2011
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker, Ruairi Seosamh O'Meadhra
  • Patent number: 7910769
    Abstract: 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: Grant
    Filed: June 16, 2005
    Date of Patent: March 22, 2011
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Puneet Gupta, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
  • Patent number: 7910071
    Abstract: 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: Grant
    Filed: August 27, 2009
    Date of Patent: March 22, 2011
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Howard Wood Jenkins, Jr., Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
  • Patent number: 7902396
    Abstract: 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: Grant
    Filed: June 24, 2009
    Date of Patent: March 8, 2011
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Gino Georges Lavoie, Charles Edwan Sumner, Jr.
  • Patent number: 7902395
    Abstract: Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus providing flexibility in the treatment and use of such oxidation byproducts.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: March 8, 2011
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker
  • Patent number: 7897810
    Abstract: 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: Grant
    Filed: March 18, 2008
    Date of Patent: March 1, 2011
    Assignee: Eastman Chemical Company
    Inventors: Robert Lin, Marcel de Vreede
  • Patent number: 7897809
    Abstract: 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: Grant
    Filed: August 27, 2007
    Date of Patent: March 1, 2011
    Assignee: Eastman Chemical Company
    Inventors: Johannes Wilhelmus Sluijmers, Kenny Randolph Parker, Philip Edward Gibson, Marcel de Vreede, Ardie Heijblom
  • Patent number: 7897808
    Abstract: Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus providing flexibility in the treatment and use of such oxidation byproducts.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: March 1, 2011
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker
  • Patent number: 7888529
    Abstract: 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: Grant
    Filed: February 12, 2007
    Date of Patent: February 15, 2011
    Assignee: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Philip Edward Gibson
  • Patent number: 7888530
    Abstract: 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: Grant
    Filed: July 14, 2005
    Date of Patent: February 15, 2011
    Assignee: Eastman Chemical Company
    Inventors: Robert Lin, Marcel de Vreede
  • Patent number: 7884233
    Abstract: 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: Grant
    Filed: June 26, 2009
    Date of Patent: February 8, 2011
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker, Ronald Buford Sheppard
  • Patent number: 7884231
    Abstract: 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: Grant
    Filed: March 1, 2006
    Date of Patent: February 8, 2011
    Assignee: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Philip Edward Gibson, Ruairi Seosamh O'Meadhra
  • Patent number: 7884232
    Abstract: 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: Grant
    Filed: March 1, 2006
    Date of Patent: February 8, 2011
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Thomas Young Lightfoot, Thomas Earl Woodruff, Charles Helton Hitchcock, David Lee Denton, Carl Norman McCurry
  • Patent number: 7880031
    Abstract: 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: Grant
    Filed: March 1, 2006
    Date of Patent: February 1, 2011
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker
  • Patent number: 7880032
    Abstract: Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus providing flexibility in the treatment and use of such oxidation byproducts.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: February 1, 2011
    Assignee: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Philip Edward Gibson
  • Patent number: 7868201
    Abstract: A process for the oxidation of hydrocarbons comprises contacting the hydrocarbon with an oxygen-containing gas in the presence of a catalyst comprising a microporous solid support, preferably a zeolite, having from 8- to 12-ring open windows and comprising non-framework metal cations selected from manganese, iron, cobalt, vanadium, chromium, copper, nickel, and ruthenium, and mixtures thereof, providing that the oxygen-containing gas does not contain significant amounts of added hydrogen. The catalyst is novel and forms part of the invention. The process may be used for oxidation of alkanes, cycloalkanes, benzene and alkylbenzenes, and is suitable for use in regioselective terminal oxidation of straight chain alkanes and for selective oxidation/separation of p-dialkylbenzenes from an alkylbenzene mixture, for example, p-xylene from an isomeric mixture of xylenes.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: January 11, 2011
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Bi-Zeng Zhan, Bjorn Moden, Jihad Dakka, Jose Santiesteban, Sebastian C. Reyes, Enrique Iglesia
  • Patent number: 7863481
    Abstract: Disclosed is a process and apparatus for treating a purge stream in a carboxylic acid production process. The process employs a purge process that allows for the separation of oxidation byproducts into benzoic acid and non-benzoic acid oxidation byproducts, thus providing flexibility in the treatment and use of such oxidation byproducts.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: January 4, 2011
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker
  • Publication number: 20100331568
    Abstract: Catalytic processes for the conversion of 2,5-dimethyl furan (DMF) to para-xylene are described. Para-xylene is a key product that is currently obtained commercially from petroleum sources. However, it has now been determined that the cycloaddition of ethylene to DMF provides an alternative route to para-xylene. Advantageously, the DMF starting material for the processes may be synthesized from carbohydrates (e.g., glucose or fructose), thereby providing a pathway that relies at least partly, if not completely, on renewable feedstocks.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 30, 2010
    Inventor: Timothy A. BRANDVOLD
  • Publication number: 20100324308
    Abstract: Herein disclosed is a method, comprising: forming a dispersion under high shear comprising gas bubbles of an oxidant dispersed in a liquid phase, wherein the bubbles have a mean diameter of less than 1.5 micron; and contacting the dispersion with an oxidation catalyst to produce a product stream, wherein the product stream comprises a substance selected from the group consisting of dicarboxylic acid, benzoic acid, 2-methylbenzoic acid, 3-methylbenzoic acid, 4-methylbenzoic acid, and phthalic anhydride. In some cases, forming the dispersion under high shear comprises introducing the oxidant and the liquid phase into a high shear device comprising at least one rotor and at least one complementarily-shaped stator. Herein also disclosed is a system for producing a substance selected from the group consisting of dicarboxylic acid, benzoic acid, 2-methylbenzoic acid, 3-methylbenzoic acid, 4-methylbenzoic acid, and phthalic anhydride.
    Type: Application
    Filed: August 12, 2010
    Publication date: December 23, 2010
    Applicant: H R D CORPORATION
    Inventors: Abbas HASSAN, Aziz HASSAN, Rayford G. Anthony, Gregory G. BORSINGER
  • Publication number: 20100324331
    Abstract: The invention relates to mixed oxide catalysts made of hollow shapes for the catalytic gas phase oxidation of olefins, and to a method for producing the catalysts by applying them as a layer to a carrier made of organic material and removing said organic material. The reaction into aldehydes and carboxylic acids occurs by air or oxygen in the presence of inert gases in different quantity ratios, at elevated temperatures and pressure in the presence of said catalysts.
    Type: Application
    Filed: January 28, 2008
    Publication date: December 23, 2010
    Inventors: Achim Fischer, Werner Burkhardt, Stefan Röder, Klaus Huthmacher
  • Patent number: 7855305
    Abstract: 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: Grant
    Filed: October 2, 2008
    Date of Patent: December 21, 2010
    Assignee: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Philip Edward Gibson, Ruairi Seosamh O'Meadhra
  • Publication number: 20100305357
    Abstract: 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: Application
    Filed: July 29, 2010
    Publication date: December 2, 2010
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Marcel de Vreede, Alan George Wonders, Robert Lin
  • Patent number: 7816556
    Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system includes a multi-stage oxidative digestion system for processing an improved initial slurry from primary oxidation. The multi-stage digestion system is capable of adequately purifying the improved initial slurry without requiring significant liquor exchange between primary oxidation and oxidative digestion.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: October 19, 2010
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Ronald Buford Sheppard, Thomas Earl Woodruff, Martin De Boer, Raymond Elbert Fogle
  • Publication number: 20100234637
    Abstract: An integrated process for producing aromatic hydrocarbons and ethylene and/or propylene and optionally other lower olefins from low molecular weight hydrocarbons, preferably methane, which comprises: (a) contacting one or more low molecular weight alkanes, preferably methane, with a halogen, preferably bromine, under process conditions sufficient to produce a monohaloalkane, preferably monobromomethane, (b) reacting a first portion of the monohaloalkane in the presence of a coupling catalyst under process conditions sufficient to produce aromatic hydrocarbons and C2-5 alkanes, (c) separating the aromatic hydrocarbons from the product mixture of step (b) to produce aromatic hydrocarbons, (d) reacting a second portion of the monohaloalkane in the presence of a coupling catalyst under process conditions sufficient to produce ethylene and/or propylene.
    Type: Application
    Filed: March 15, 2010
    Publication date: September 16, 2010
    Inventors: Howard Lam Ho FONG, Richard Dale Swain
  • Patent number: 7777072
    Abstract: 2,5-dihydroxyterephthalic acid is produced in high yields and high purity from 2,5-dihaloterephthalic acid by contact with a copper source and a ligand that coordinates to copper under basic conditions.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: August 17, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Joachim C. Ritter
  • Patent number: 7772424
    Abstract: Disclosed is an optimized system for more efficiently and economically producing terephthalic acid. The system employs an evaporative removal step downstream of oxidative digestion. The evaporative removal step removes a portion of the liquid phase and promotes precipitation of certain aromatic impurities. By promoting precipitation of certain aromatic impurities, the amount of the precipitated impurities in the recycled solvent is advantageously reduced.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: August 10, 2010
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Ronald Buford Sheppard, Thomas Earl Woodruff, Martin De Boer, Raymond Elbert Fogle, Philip Edward Gibson, Kenny Randolph Parker
  • Patent number: 7741516
    Abstract: 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: Grant
    Filed: March 1, 2006
    Date of Patent: June 22, 2010
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker, Ruairi Seosamh O'Meadhra
  • Patent number: 7741515
    Abstract: 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: Grant
    Filed: June 16, 2005
    Date of Patent: June 22, 2010
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Wayne Scott Strasser, Marcel de Vreede, J Thomas Tidwell
  • Publication number: 20100087676
    Abstract: Disclosed is an environmentally benign and simplified method for preparing aromatic dicarboxylic acid. In the disclosed method, a mixed solvent composed of aromatic mono-carboxylic acid and water, instead of conventionally used low molecular weight carboxylic acid such as acetic acid, is used as a reaction solvent for an oxidation process; manganese and a small amount of transition metal element are used as catalysts; and carbon dioxide is used as a reaction stabilizer. Accordingly, it is possible to improve the yield and selectivity of the aromatic dicarboxylic acid.
    Type: Application
    Filed: March 7, 2008
    Publication date: April 8, 2010
    Applicant: SAMSUNG PETROCHEMICAL CO., LTD.
    Inventors: Jae Sung Lee, Milan Hronec, Kyung Hee Lee, Jin Won Kwak, Young Hwan Chu
  • Patent number: 7692036
    Abstract: 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: Grant
    Filed: June 16, 2005
    Date of Patent: April 6, 2010
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Robert Lin, Lee Reynolds Partin, Marcel de Vreede, Wayne Scott Strasser
  • Patent number: 7692037
    Abstract: 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: Grant
    Filed: June 16, 2005
    Date of Patent: April 6, 2010
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Marcel de Vreede, Lee Reynolds Partin, Wayne Scott Strasser
  • Patent number: 7683210
    Abstract: 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: Grant
    Filed: June 16, 2005
    Date of Patent: March 23, 2010
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Thomas Young Lightfoot, Thomas Earl Woodruff, Charles Helton Hitchcock, David Lee Denton, Carl Norman McCurry
  • Patent number: 7659427
    Abstract: 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: Grant
    Filed: May 7, 2008
    Date of Patent: February 9, 2010
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Wayne Scott Strasser, Marcel de Vreede, J. Thomas Tidwell
  • Patent number: 7649109
    Abstract: A polyester production process employing an esterification system that uses a distillation column to recover alcohol produced from an esterification zone and then recirculates the recovered alcohol back to the esterification zone without substantially cooling the recovered alcohol.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: January 19, 2010
    Assignee: Eastman Chemical Company
    Inventor: Bruce Roger DeBruin
  • Patent number: 7629489
    Abstract: Hydroxy aromatic acids are produced in high yields and high purity (>95%) from halogenated aromatic acids in a reaction mixture containing a copper source and a ligand that coordinates to copper.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: December 8, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Joachim C. Ritter
  • Patent number: 7626053
    Abstract: Hydroxy aromatic acids are produced in high yields and high purity (>95%) from halogenated aromatic acids in a reaction mixture containing a copper source and a ligand that coordinates to copper.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: December 1, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: Joachim C. Ritter
  • Patent number: 7615145
    Abstract: The present invention relates to a process of reducing sulfur- or nitrogen-containing compounds and producing oxygenates, and in particular to a one-pot process of reducing sulfur- or nitrogen-containing compounds and also producing oxygenates in the presence of a homogeneous catalyst such as Mn+/a first solvent or M1n+/a second solvent/M2m+/a third solvent or a mixture thereof, the process herein being useful as an excellent octane booster in the reformulated gasoline and as a cetane booster for the future oxygenated diesel in a one-pot reaction.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: November 10, 2009
    Assignee: Kocat Inc.
    Inventors: Jin S. Yoo, Sang-Chul Lee, Ho Dong Kim
  • Patent number: 7608733
    Abstract: 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: Grant
    Filed: June 16, 2005
    Date of Patent: October 27, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Howard Wood Jenkins, Jr., Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
  • Patent number: 7608732
    Abstract: 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: Grant
    Filed: June 16, 2005
    Date of Patent: October 27, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Gino Georges Lavoie, Charles Edwan Sumner, Jr., Bryan Wayne Davenport, Marcel de Vreede, Brent Alan Tennant