Patents Represented by Attorney Steven A. Owen

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  • Optimized liquid-phase oxidation
    Patent number: 7572936
    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: August 11, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
  • Optimized liquid-phase oxidation
    Patent number: 7572932
    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: August 11, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
  • Process for removal of benzoic acid from an oxidizer purge stream
    Patent number: 7569722
    Abstract: A process is disclosed that relates to the removal of impurities, specifically benzoic acid, from a mother liquor produced in the synthesis of carboxylic acid, typically terephthalic acid.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: August 4, 2009
    Assignee: Eastman Chemical Company
    Inventors: Robert Lin, Philip Edward Gibson, Kenny Randolph Parker
  • Optimized liquid-phase oxidation
    Patent number: 7568361
    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: August 4, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Robert Lin, Marcel de Vreede, Lee Reynolds Partin
  • Optimized liquid-phase oxidation
    Patent number: 7563926
    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: July 21, 2009
    Assignee: Eastman Chemical Company
    Inventors: Marcel de Vreede, Lee Reynolds Partin, Wayne Scott Strasser
  • Enriched terephthalic acid composition
    Patent number: 7557243
    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: July 7, 2009
    Assignee: Eastman Chemical Company
    Inventors: Philip Edward Gibson, Kenny Randolph Parker, Ronald Buford Sheppard
  • Processes for producing aromatic dicarboxylic acids
    Patent number: 7550627
    Abstract: Processes for producing aromatic dicarboxylic acids are disclosed, the processes including a step of combining in a reaction medium a dialkyl aromatic, a solvent comprising water and a saturated organic acid having from 2-4 carbon atoms, and an oxygen-containing gas, at a temperature from about 125° C. to about 155° C., in the presence of a catalyst composition comprising cobalt, manganese, zirconium, and bromine, wherein the weight ratio of cobalt to manganese in the reaction mixture is from about 10 to about 400. The processes provide improved conversion, while reducing the formation of carbon oxides and other by-products.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: June 23, 2009
    Assignee: Eastman Chemical Company
    Inventors: Gino Georges Lavoie, Robert Thomas Hembre, Charles Edwan Sumner, Jr., Joseph Nathaniel Bays, Daniel Burts Compton, Brent Alan Tennant, Bryan Wayne Davenport, David Lange, Thomas Richard Floyd
  • Process for production of a dried carboxylic acid cake suitable for use in polyester production
    Patent number: 7546747
    Abstract: The present invention relates to a process by which a dried carboxylic acid cake is obtained from a slurry or cake carboxylic acid product through the use of at least one counter current wash. More specifically, the present invention relates to a process by which a dried terephthalic acid cake suitable as a starting material for polyester or co-polyester production is obtained from a slurry or cake terephthalic acid product through the use of at least one counter current wash.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: June 16, 2009
    Assignee: Eastman Chemical Company
    Inventors: Kenny Randolph Parker, Robert Lin, Philip Edward Gibson
  • Polyester process using a pipe reactor
    Patent number: 7541423
    Abstract: The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior art processes including improved heat transfer, volume control, agitation and disengagement functions.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: June 2, 2009
    Assignee: Eastman Chemical Company
    Inventor: Bruce Roger DeBruin
  • In-line classifier for powdered products
    Patent number: 7540386
    Abstract: A classifier for classifying particulates entrained in a flowing stream of gas is configured such that a change of direction of gas flow causes particles to impinge upon a target, heavier particles being trapped in a downwardly extending fluidized trap. The classifier is easily constructed, has no moving parts, and can take the place of sifters and other equipment traditionally used for classifying such product streams.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: June 2, 2009
    Assignee: Eastman Chemical Company
    Inventors: Lawrence Carvagno, William L. Cook, Ronald Keith Dailey, Jacob Anthony Southerland
  • Polyester process using a pipe reactor
    Patent number: 7531618
    Abstract: The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior art processes including improved heat transfer, volume control, agitation and disengagement functions.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: May 12, 2009
    Assignee: Eastman Chemical Company
    Inventor: Bruce Roger DeBruin
  • Optimized liquid-phase oxidation
    Patent number: 7507857
    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 24, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede, Puneet Gupta
  • Optimized liquid-phase oxidation
    Patent number: 7504535
    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 17, 2009
    Assignee: Eastman Chemical Company
    Inventors: Marcel de Vreede, Alan George Wonders, Robert Lin
  • Polycarboxylic acid production system employing oxidative digestion with reduced or eliminated upstream liquor exchange
    Patent number: 7501537
    Abstract: 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: Grant
    Filed: March 1, 2006
    Date of Patent: March 10, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Ronald Buford Sheppard, Martin De Boer, Raymond Elbert Fogle, Marcel de Vreede
  • Optimized liquid-phase oxidation
    Patent number: 7498002
    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 29, 2007
    Date of Patent: March 3, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Howard Wood Jenkins, Jr., Lee Reynolds Partin, Wayne Scott Strasser, Marcel deVreede
  • Optimized liquid-phase oxidation
    Patent number: 7498003
    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 29, 2007
    Date of Patent: March 3, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel deVreede, Puneet Gupta
  • Polyester process using a pipe reactor
    Patent number: 7495067
    Abstract: The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior art processes including improved heat transfer, volume control, agitation and disengagement functions.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: February 24, 2009
    Assignee: Eastman Chemical Company
    Inventor: Bruce Roger DeBruin
  • Optimized liquid-phase oxidation
    Patent number: 7495125
    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: February 24, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Lee Reynolds Partin, Wayne Scott Strasser, Marcel de Vreede
  • Extraction process for removal of impurities from an oxidizer purge stream in the synthesis of carboxylic acid
    Patent number: 7494641
    Abstract: Disclosed is a process that relates to the recovery of a metal catalyst from an oxidizer purge stream produced in the synthesis of carboxylic acid, typically terephthalic acid. The process involves the addition of a wash solution to a high temperature molten dispersion to recover the metal catalyst and then subjecting an aqueous mixture or purified aqueous mixture so formed to a single stage extraction to remove organic impurities to produce an extract stream and a raffinate stream comprising the metal catalyst.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: February 24, 2009
    Assignee: Eastman Chemical Company
    Inventors: Robert Lin, Marcel de Vreede
  • Oxidation system with internal secondary reactor
    Patent number: 7491369
    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 29, 2007
    Date of Patent: February 17, 2009
    Assignee: Eastman Chemical Company
    Inventors: Alan George Wonders, Thomas Earl Woodruff, Ronald Buford Sheppard, Wayne Scott Strasser