Patents by Inventor Max M. Tirtowidjojo

Max M. Tirtowidjojo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20140163265
    Abstract: Processes for the production of chlorinated propenes are provided. The present processes make use of a feedstock comprising 1,2,3-trichloropropane and chlorinates the 1,1,2,3-tetrachloropropane generated by the process prior to a dehydrochlorination step. Production of the less desirable pentachloropropane isomer, 1,1,2,3,3-pentachloropropane, is thus minimized. The present processes provide better reaction yield as compared to conventional processes that require dehydrochlorination of 1,1,2,3-tetrachloropropane prior to chlorinating the same. The present process can also generate anhydrous HCl as a byproduct that can be removed from the process and used as a feedstock for other processes, while limiting the production of waste water, thus providing further time and cost savings.
    Type: Application
    Filed: August 1, 2012
    Publication date: June 12, 2014
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Max M. Tirtowidjojo, Barry B. Fish, David S. Laitar
  • Publication number: 20140100394
    Abstract: Processes for the production of chlorinated propenes are provided. The present processes make use of a feedstream comprising 1,2-dichloropropane, a by-product in the production of chlorohydrin, as a low cost starting material, alone or in combination with 1,2,3-trichloropropane. Selectivity of the process is enhanced over conventional processes employing successive chlorinations and/or dehydrochlorinations, by conducting at least one chlorination in the presence of an ionic chlorination catalyst. The present processes may also generate anhydrous HCl as a byproduct that can be removed from the process and used as a feedstock for other processes, providing further time and cost savings.
    Type: Application
    Filed: May 18, 2012
    Publication date: April 10, 2014
    Applicant: DOW GLOBAL TECHNOLOGIES, LLC
    Inventors: Max M. Tirtowidjojo, William J. Kruper, JR., Barry B. Fish, David S. Laitar
  • Publication number: 20140081055
    Abstract: Processes for the production of chlorinated propenes are provided. The present processes make use of 1,2-dichloropropane, a by-product in the production of chlorohydrin, as a low cost starting material, alone or in combination with 1,2,3-trichloropropane. The present processes can also generate anhydrous HCl as a byproduct that can be removed from the process and used as a feedstock for other processes, providing further time and cost savings. Finally, the processes are advantageously conducted in the liquid phase, thereby presenting additional savings as compared to conventional, gas phase processes.
    Type: Application
    Filed: May 18, 2012
    Publication date: March 20, 2014
    Applicant: DOW GLOBAL TECHNOLOGIES, LLC
    Inventors: Max M. Tirtowidjojo, William J. Kruper, JR., Barry B. Fish, David S. Laitar
  • Patent number: 8581012
    Abstract: The present invention provides continuous, gas phase, free radical processes for the production of chlorinated and/or fluorinated propenes or higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes, wherein wherein at least a portion of any intermediate boiler by-products generated by the process are removed from the process.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: November 12, 2013
    Assignee: Dow Global Technologies, LLC
    Inventors: Max M. Tirtowidjojo, Patrick H. Au-Yeung, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt F. Hirsekorn, Manfred Kokott, William J. Kruper, Jr., Thomas U. Luebbe, Holger Meemann, Shirley S. Sexton, Peter Wenzel, Marcus Wobser
  • Patent number: 8581011
    Abstract: The present invention provides one-step processes for the production of chlorinated and/or fluorinated propenes. The processes provide good product yield with low, e.g., less than about 20%, or even less than 10%, concentrations of residues/by-products. Advantageously, the processes may be conducted at low temperatures than 500° C. so that energy savings are provided, and/or at higher pressures so that high throughputs may also be realized. The use of catalysts or initiators may provide additional enhancements to conversion rates and selectivity, as may adjustments to the molar ratio of the reactants.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: November 12, 2013
    Assignee: Dow Global Technologies, LLC
    Inventors: Max M. Tirtowidjojo, Debashis Chakraborty, Juergen Eiffler, Kurt F. Hirsekorn, William J. Kruper, Jr.
  • Patent number: 8558041
    Abstract: The present invention provides isothermal multitube reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors utilize a feed mixture inlet temperature at least 20° C. different from a desired reaction temperature.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: October 15, 2013
    Assignee: Dow Global Technologies, LLC
    Inventors: Max M. Tirtowidjojo, Hua Bai, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt F. Hirsekorn, Manfred Kokott, William J. Kruper, Jr., Thomas U. Luebbe, Avani M. Patel, Shirley S. Sexton, Peter Wenzel, Marcus Wobser
  • Publication number: 20130144073
    Abstract: At least one method to efficiently produce alkylene oxide from partial oxidation of hydrocarbons using a high efficiency heterogeneous catalyst in a fixed bed enclosed within a reaction vessel, and a reaction vessel constructed to facilitate the same.
    Type: Application
    Filed: March 17, 2011
    Publication date: June 6, 2013
    Applicant: THE DOW CHEMICAL INVESTMENTS LLC
    Inventors: Max M. Tirtowidjojo, Subrata Sen, Christina Zarth, Pramod D. Patil
  • Patent number: 8258353
    Abstract: The present invention provides one-step processes for the production of chlorinated and/or fluorinated propenes. The processes provide good product yield with low, e.g., less than about 20%, or even less than 10%, concentrations of residues/by-products. Advantageously, the processes may be conducted at low temperatures relative to conventional processes, so that energy savings are provided, and/or at higher pressures so that high throughputs may also be realized. The use of catalysts may provide enhancements to conversion rates and selectivity over those seen in conventional processes, as may adjustments to the molar ratio of the reactants.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: September 4, 2012
    Assignee: Dow Global Technologies, LLC
    Inventors: William J. Kruper, Jr., Max M. Tirtowidjojo, Kurt F. Hirsekorn, Debashis Chakraborty, Juergen Eiffler
  • Patent number: 8129436
    Abstract: The present invention provides a method for simplifying manufacture of a mixed alcohol or mixed oxygenate product from synthesis gas. The mixed alcohol or mixed oxygenate product contains ethanol and other oxygenates with two or more carbon atoms per molecule. The method includes stripping a portion of carbon dioxide and inert gases contained in a mixed alcohol synthesis reaction product using a methanol-containing stream, such as one produced as part of the method, as a medium to absorb said carbon dioxide and inert gases and recycling light products and heavy products to one or more of synthesis gas generation, mixed alcohol synthesis and separation of desired mixed alcohol or mixed oxygenate products from other components of a mixed alcohol synthesis stream.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: March 6, 2012
    Assignee: Dow Global Technologies LLC
    Inventors: Max M. Tirtowidjojo, Barry B. Fish, Hendrik L. Pelt, Dennis W. Jewell, Mark D. Bearden, John G. Pendergast, Jr., Jon H. Siddall, Brien A. Stears, Haivan D. Tran, Jan W. Verwijs, Aaltje Verwijs-van den Brink, legal representative, Lena Verwijs, legal representative, Hendrika Gerrita Verwijs, legal representative, Richard M. Wehmeyer
  • Publication number: 20110178343
    Abstract: The present invention provides one-step processes for the production of chlorinated and/or fluorinated propenes. The processes provide good product yield with low, e.g., less than about 20%, or even less than 10%, concentrations of residues/by-products. Advantageously, the processes may be conducted at low temperatures relative to conventional processes, so that energy savings are provided, and/or at higher pressures so that high throughputs may also be realized. The use of catalysts may provide enhancements to conversion rates and selectivity over those seen in conventional processes, as may adjustments to the molar ratio of the reactants.
    Type: Application
    Filed: April 20, 2010
    Publication date: July 21, 2011
    Applicant: DOW GLOBAL TECHNOLOGIES, INC.
    Inventors: William J. Kruper, JR., Max M. Tirtowidjojo, Kurt F. Hirsekorn, Debashis Chakraborty, Juergen Eiffler
  • Publication number: 20110087055
    Abstract: The present invention provides continuous, gas phase, free radical processes for the production of chlorinated and/or fluorinated propenes or higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes, wherein wherein at least a portion of any intermediate boiler by-products generated by the process are removed from the process
    Type: Application
    Filed: October 8, 2010
    Publication date: April 14, 2011
    Applicant: DOW GLOBAL TECHNOLOGIES
    Inventors: Max M. Tirtowidjojo, Patrick H. Au-Yeung, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt F. Hirsekorn, Manfred Kokott, William J. Kruper, JR., Thomas U. Luebbe, Holger Meeman, Shirley S. Sexton, Peter Wenzel, Marcus Wobser
  • Publication number: 20110083955
    Abstract: The present invention provides one-step processes for the production of chlorinated and/or fluorinated propenes. The processes provide good product yield with low, e.g., less than about 20%, or even less than 10%, concentrations of residues/by-products. Advantageously, the processes may be conducted at low temperatures than 500° C. so that energy savings are provided, and/or at higher pressures so that high throughputs may also be realized. The use of catalysts or initiators may provide additional enhancements to conversion rates and selectivity, as may adjustments to the molar ratio of the reactants.
    Type: Application
    Filed: October 8, 2010
    Publication date: April 14, 2011
    Applicant: DOW GLOBAL TECHNOLOGIES, INC
    Inventors: Max M. Tirtowidjojo, Debashis Chakraborty, Juergen Eiffler, Kurt F. Hirsekorn, William J. Kruper, JR.
  • Publication number: 20110087054
    Abstract: The present invention provides isothermal multitube reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors utilize a feed mixture inlet temperature at least 20° C. different from a desired reaction temperature.
    Type: Application
    Filed: October 8, 2010
    Publication date: April 14, 2011
    Applicant: DOW GLOBAL TECHNOLOGIES
    Inventors: Max M. Tirtowidjojo, Hua Bai, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt F. Hirsekorn, Manfred Kokott, William J. Kruper, JR., Thomas U. Luebbe, Avani M. Patel, Shirley S. Sexton, Peter Wenzel, Marcus Wobser
  • Publication number: 20110087056
    Abstract: The present invention provides adiabatic plug flow reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors comprise one or more designs that minimize the production of by-products at a desired conversion.
    Type: Application
    Filed: October 8, 2010
    Publication date: April 14, 2011
    Applicant: DOW GLOBAL TECHNOLOGIES
    Inventors: Max M. Tirtowidjojo, Hua Bai, Debashis Chakraborty, Juergen Eiffler, Heinz Groenewald, Kurt F. Hirsekorn, Manfred Kokott, William J. Kruper, JR., Thomas U. Luebbe, Thomas J. Parsons, Avani Maulik Patel, Marcus Wobser
  • Publication number: 20100069515
    Abstract: The present invention provides a method for simplifying manufacture of a mixed alcohol or mixed oxygenate product from synthesis gas. The mixed alcohol or mixed oxygenate product contains ethanol and other oxygenates with two or more carbon atoms per molecule. The method includes stripping a portion of carbon dioxide and inert gases contained in a mixed alcohol synthesis reaction product using a methanol-containing stream, such as one produced as part of the method, as a medium to absorb said carbon dioxide and inert gases and recycling light products and heavy products to one or more of synthesis gas generation, mixed alcohol synthesis and separation of desired mixed alcohol or mixed oxygenate products from other components of a mixed alcohol synthesis stream.
    Type: Application
    Filed: March 21, 2007
    Publication date: March 18, 2010
    Inventors: Max M. Tirtowidjojo, Barry B. Fish, Hendrik L. Pelt, Dennis W. Jewell, Mark D. Bearden, John G. Pendergast, JR., Jon H. Siddall, Brien A. Stears, Haivan D. Tran, Jan W. Verwijs, Richard M. Wehmeyer
  • Patent number: 6004517
    Abstract: Allyl halide is produced in high yields and purity with minimal carbon formation using a process of: (1) initially reacting propylene and molecular halogen in a molar ratio of at least about 2.5:1 in a "continuously stirred tank reactor" (CSTR) zone under conditions suitable to provide a reaction temperature of about 400.degree. C. to 525.degree. C. to partially convert propylene and chlorine into allyl chloride; and (2) feeding an effluent from Step (1) into a plug-flow reactor zone where the reaction is continued at a temperature of about 400.degree. C. to 525.degree. C. until essentially all of the chlorine is consumed. A preferred reactor for the process contains: (1) a spherical, egg-shaped or oval reactor zone; (2) a tubular reactor zone attached to the spherical, egg-shaped or oval reactor zone; (3) one or more inlets for injecting gaseous reagents into the spherical, oval or egg-shaped reactor zone; and (4) one or more outlets from the tubular reactor zone for withdrawing a gaseous product.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: December 21, 1999
    Assignee: The Dow Chemical Company
    Inventors: Max M. Tirtowidjojo, Paul C. Beckett, John F. Baker
  • Patent number: 5504266
    Abstract: Allyl halide is produced in high yields and purity with minimal carbon formation using a process of: (1) initially reacting propylene and molecular halogen in a molar ratio of at least about 2.5:1 in a "continuously stirred tank reactor" (CSTR) zone under conditions suitable to provide a reaction temperature of about 400.degree. C. to 525.degree. C. to partially convert propylene and chlorine into allyl chloride; and (2) feeding an effluent from Step (1) into a plug-flow reactor zone where the reaction is continued at a temperature of about 400.degree. C. to 525.degree. C. until essentially all of the chlorine is consumed. A preferred reactor for the process contains: (1) a spherical, egg-shaped or oval reactor zone; (2) a tubular reactor zone attached to the spherical, egg-shaped or oval reactor zone; (3) one or more inlets for injecting gaseous reagents into the spherical, oval or egg-shaped reactor zone; and (4) one or more outlets from the tubular reactor zone for withdrawing a gaseous product.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: April 2, 1996
    Assignee: The Dow Chemical Company
    Inventors: Max M. Tirtowidjojo, Paul C. Beckett, John F. Baker