Patents by Inventor Prasad Muppa

Prasad Muppa 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).

  • Patent number: 9227947
    Abstract: The invention relates to a process for the manufacture of epichlorohydrin (“ECH”) by catalytic oxidation of allyl chloride (“AC”) with an oxidant wherein the catalytic oxidation is performed in an aqueous reaction medium, wherein a water-soluble manganese complex is used as oxidation catalyst, followed by the isolation of epichlorohydrin.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: January 5, 2016
    Assignee: HEXION INC.
    Inventors: Ron Postma, Prasad Muppa
  • Patent number: 9199951
    Abstract: The invention relates to a process for the manufacture of a 1,2-epoxide by catalytic oxidation of a terminal olefin with hydrogen peroxide wherein the catalytic oxidation is performed in a biphasic system comprising an organic phase and an aqueous reaction medium, wherein a water-soluble manganese complex is used as oxidation catalyst, wherein a terminal olefin is used with a solubility at 20° C. of at least 0.01 to 100 g in 1 liter water, and wherein the molar ratio of terminal olefin to hydrogen peroxide is in the range of from 1:0.1 to 1:2.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: December 1, 2015
    Assignee: HEXION INC.
    Inventors: Ron Postma, Prasad Muppa
  • Patent number: 9174955
    Abstract: The invention relates to a process for the manufacture of an epoxyethyl carboxylate or glycidyl carboxylate, including reacting a vinyl carboxylate or an allyl carboxylate using an oxidant and a water-soluble manganese complex in an aqueous reaction medium, and the water-soluble manganese complex comprises an oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear species of the general formula (I) [LMnX3]Y (I), or a binuclear species of the general formula (II): [LMn(?-X)3MnL]Yn (II), wherein Mn is a manganese; L is a ligand and each L is independently a polydentate ligand, each X is independently a coordinating species and each ?-X is independently a bridging coordinating species, Y is a non-coordinating counter ion, and wherein the epoxidation is carried out at a pH in the range of from 1.0 to 7.0.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: November 3, 2015
    Assignee: HEXION INC.
    Inventors: Prasad Muppa, Ron Postma, Caspar Schoolderman, Sandra Rens, Kostas Stoitsas
  • Patent number: 9145378
    Abstract: Processes are provided for the formation of an epoxyethyl ether or a glycidyl ether. In one embodiment, a process is provided for the manufacture of an epoxyethyl ether or glycidyl ether including reacting a vinyl ether or an allyl ether with an oxidant in the presence of a water-soluble manganese complex in an aqueous reaction medium, wherein the water-soluble manganese complex comprises an oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear complex of the general formula (I): [LMnX3]Y (I), or a binuclear complex of the general formula (II): [LMn(?-X)3MnL](Y)n (II), wherein Mn is a manganese; L or each L independently is a polydentate ligand, each X independently is a coordinating species and each ?-X independently is a bridging coordinating species, Y is a non-coordinating counter ion, and wherein the epoxidation is carried out at a pH in the range of from 1.0 to 6.0. The invention also relates to epoxyethyl ethers.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: September 29, 2015
    Assignee: HEXION INC.
    Inventors: Prasad Muppa, Ron Postma, Caspar Schoolderman, Sandra Rens, Kostas Stoitsas
  • Patent number: 9102640
    Abstract: Apparatus and processes are provided for forming epoxide compounds. In one embodiment, a process for the manufacture of an epoxide is provided including adding an oxidant, a water-soluble manganese complex and a terminal olefin to form a multiphasic reaction mixture, reacting the terminal olefin with the oxidant in the multiphasic reaction mixture having at least one organic phase in the presence of the water-soluble manganese complex, separating the reaction mixture into the at least one organic phase and an aqueous phase, and reusing at least part of the aqueous phase. The invention is also related to a device for performing the above process.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: August 11, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Prasad Muppa, Ron Postma, Bart Van Den Berg, Jürgen Stock, Holger Wiederhold, Hans Rausch, Jörg Schallenberg, Stefan Bernhardt
  • Patent number: 9024048
    Abstract: Apparatus and methods are provided for forming and processing multiphasic systems. In one embodiment, the invention provides a process for the manufacture of an epoxide, including reacting an olefinically unsaturated compound with an oxidant in the presence of a buffer component and a water-soluble manganese complex disposed in an aqueous phase having a first pH level in a first multiphasic system, adjusting the pH of the aqueous phase to a second pH level less than the first pH level, isolating at least a portion of the aqueous phase from the first multiphasic system, adjusting the pH of the at least a portion of the aqueous phase to a third pH level greater than the second pH level, and introducing the at least a portion of the aqueous phase into a second multiphasic system.
    Type: Grant
    Filed: June 13, 2012
    Date of Patent: May 5, 2015
    Assignee: Evonik Degussa GmbH
    Inventors: Mark Kapellen, Bart Van Den Berg, Prasad Muppa, Paul Haesakkers
  • Patent number: 8975423
    Abstract: Processes and compositions are provided for epoxidizing an olefinically unsaturated compound. In one embodiment, a process is provided for reacting an olefinically unsaturated compound with an oxidant in the presence of a catalyst at acidic conditions, wherein the catalyst is activated prior to the reaction at a pH that is higher than the pH during the reaction.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: March 10, 2015
    Assignee: Hexion Inc.
    Inventors: Prasad Muppa, Mark Kapellen, Caspar Schoolderman
  • Patent number: 8859790
    Abstract: Apparatus and processes are provided for forming epoxide compounds. In one embodiment, a process for the manufacture of an epoxide is provided including adding an oxidant, a water-soluble manganese complex and a terminal olefin to form a multiphasic reaction mixture, reacting the terminal olefin with the oxidant in the multiphasic reaction mixture having at least one organic phase in the presence of the water-soluble manganese complex, separating the reaction mixture into the at least one organic phase and an aqueous phase, and reusing at least part of the aqueous phase. The invention is also related to a device for performing the above process.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: October 14, 2014
    Assignee: Momentive Specialty Chemicals Inc.
    Inventors: Prasad Muppa, Ron Postma, Bart Van Den Berg, Juergen Stock, Holger Wiederhold, Hans Rausch, Jorg Schallenberg, Stefan Bernhardt
  • Publication number: 20140296545
    Abstract: The invention relates to a process for the manufacture of a 1,2-epoxide by catalytic oxidation of a terminal olefin with hydrogen peroxide wherein the catalytic oxidation is performed in a biphasic system comprising an organic phase and an aqueous reaction medium, wherein a water-soluble manganese complex is used as oxidation catalyst, wherein a terminal olefin is used with a solubility at 20° C. of at least 0.01 to 100 g in 1 liter water, and wherein the molar ratio of terminal olefin to hydrogen peroxide is in the range of from 1:0.1 to 1:2.
    Type: Application
    Filed: March 24, 2014
    Publication date: October 2, 2014
    Applicant: Momentive Specialty Chemicals Inc.
    Inventors: Ron Postma, Prasad Muppa
  • Publication number: 20140256968
    Abstract: The invention relates to a process for the manufacture of epichlorohydrin (“ECH”) by catalytic oxidation of allyl chloride (“AC”) with an oxidant wherein the catalytic oxidation is performed in an aqueous reaction medium, wherein a water-soluble manganese complex is used as oxidation catalyst, followed by the isolation of epichlorohydrin.
    Type: Application
    Filed: May 22, 2014
    Publication date: September 11, 2014
    Applicant: Momentive Specialty Chemicals Inc.
    Inventors: Ron POSTMA, Prasad MUPPA
  • Patent number: 8802873
    Abstract: The invention relates to a process for the manufacture of epichlorohydrin (“ECH”) by catalytic oxidation of allyl chloride (“AC”) with an oxidant wherein the catalytic oxidation is performed in an aqueous reaction medium, wherein a water-soluble manganese complex is used as oxidation catalyst, followed by the isolation of epichlorohydrin.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: August 12, 2014
    Assignee: Momentive Specialty Chemicals Inc.
    Inventors: Ron Postma, Prasad Muppa
  • Publication number: 20140171666
    Abstract: Apparatus and processes are provided for forming epoxide compounds. In one embodiment, a process for the manufacture of an epoxide is provided including adding an oxidant, a water-soluble manganese complex and a terminal olefin to form a multiphasic reaction mixture, reacting the terminal olefin with the oxidant in the multiphasic reaction mixture having at least one organic phase in the presence of the water-soluble manganese complex, separating the reaction mixture into the at least one organic phase and an aqueous phase, and reusing at least part of the aqueous phase. The invention is also related to a device for performing the above process.
    Type: Application
    Filed: February 19, 2014
    Publication date: June 19, 2014
    Applicant: Momentive Specialty Chemicals Inc.
    Inventors: Prasad MUPPA, Ron Postma, Bart Van Den Berg, Juergen Stock, Holger Wiederhold, Hans Rausch, Jörg Schallenberg, Stefan Bernhardt
  • Patent number: 8735613
    Abstract: A process for the manufacture of propylene oxide (“PO”) by catalytic oxidation of propylene with an oxidant wherein the catalytic oxidation is performed in an aqueous reaction medium, comprising water with less than 10% by volume of cosolvents, wherein a water-soluble manganese complex is used as oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear species of the general formula (I): [LMnX3]Y ??(I) or a binuclear species of the general formula (II): [LMn(?-X)3MnL]Y2 ??(II) wherein Mn is a manganese; L or each L independently is a polydentate ligand, each X independently is a coordinating species and each ?-X independently is a bridging coordinating species, whereas Y is an non-coordinating counterion, and wherein the catalytic oxidation is carried out at a pH in the range of from 1.5 to 6.0.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: May 27, 2014
    Assignee: Momentive Specialty Chemicals Inc.
    Inventors: Prasad Muppa, Caspar Schoolderman, Sandra Rens Van Der Lee, Ron Postma
  • Patent number: 8729282
    Abstract: The invention relates to a process for the manufacture of a 1,2-epoxide by catalytic oxidation of a terminal olefin with hydrogen peroxide wherein the catalytic oxidation is performed in a biphasic system comprising an organic phase and an aqueous reaction medium, wherein a water-soluble manganese complex is used as oxidation catalyst, wherein a terminal olefin is used with a solubility at 20° C. of at least 0.01 to 100 g in 1 liter water, and wherein the molar ratio of terminal olefin to hydrogen peroxide is in the range of from 1:0.1 to 1:2.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: May 20, 2014
    Assignee: Momentive Specialty Chemicals Inc.
    Inventors: Ron Postma, Prasad Muppa
  • Publication number: 20140113801
    Abstract: Apparatus and methods are provided for forming and processing multiphasic systems. In one embodiment, the invention provides a process for the manufacture of an epoxide, including reacting an olefinically unsaturated compound with an oxidant in the presence of a buffer component and a water-soluble manganese complex disposed in an aqueous phase having a first pH level in a first multiphasic system, adjusting the pH of the aqueous phase to a second pH level less than the first pH level, isolating at least a portion of the aqueous phase from the first multiphasic system, adjusting the pH of the at least a portion of the aqueous phase to a third pH level greater than the second pH level, and introducing the at least a portion of the aqueous phase into a second multiphasic system.
    Type: Application
    Filed: June 13, 2012
    Publication date: April 24, 2014
    Applicant: Momentive Specialty Chemicals Inc.
    Inventors: Mark Kapellen, Bert Van Den Bert, Prasad Muppa, Paul Haesakkers
  • Publication number: 20130023680
    Abstract: Apparatus and processes are provided for forming epoxide compounds. In one embodiment, a process for the manufacture of an epoxide is provided including adding an oxidant, a water-soluble manganese complex and a terminal olefin to form a multiphasic reaction mixture, reacting the terminal olefin with the oxidant in the multiphasic reaction mixture having at least one organic phase in the presence of the water-soluble manganese complex, separating the reaction mixture into the at least one organic phase and an aqueous phase, and reusing at least part of the aqueous phase. The invention is also related to a device for performing the above process.
    Type: Application
    Filed: January 26, 2011
    Publication date: January 24, 2013
    Inventors: Prasad Muppa, Ron Postma, Bart Van Den Berg, Juergen Stock, Holger Wiederhold, Hans Rausch, Jorg Schallenberg, Stefan Bernhardt
  • Publication number: 20130006001
    Abstract: The invention relates to a process for the manufacture of an epoxyethyl carboxylate or glycidyl carboxylate, including reacting a vinyl carboxylate or an allyl carboxylate using an oxidant and a water-soluble manganese complex in an aqueous reaction medium, and the water-soluble manganese complex comprises an oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear species of the general formula (I) [LMnX3]Y (I), or a binuclear species of the general formula (II): [LMn(??X)3MnL]Yn (II), wherein Mn is a manganese; L is a ligand and each L is independently a polydentate ligand, each X is independently a coordinating species and each ??X is independently a bridging coordinating species, Y is a non-coordinating counter ion, and wherein the epoxidation is carried out at a pH in the range of from 1.0 to 7.
    Type: Application
    Filed: January 26, 2011
    Publication date: January 3, 2013
    Inventors: Prasad Muppa, Ron Postma, Caspar Schoolderman, Sandra Rens, Kostas Stoitsas
  • Publication number: 20120330041
    Abstract: Processes are provided for the formation of an epoxyethyl ether or a glycidyl ether. In one embodiment, a process is provided for the manufacture of an epoxyethyl ether or glycidyl ether including reacting a vinyl ether or an allyl ether with an oxidant in the presence of a water-soluble manganese complex in an aqueous reaction medium, wherein the water-soluble manganese complex comprises an oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear complex of the general formula (I): [LMnX3]Y (I), or a binuclear complex of the general formula (II): [LMn(?-X)3MnL](Y)n (II), wherein Mn is a manganese; L or each L independently is a polydentate ligand, each X independently is a coordinating species and each ?-X independently is a bridging coordinating species, Y is a non-coordinating counter ion, and wherein the epoxidation is carried out at a pH in the range of from 1.0 to 6.0. The invention also relates to epoxyethyl ethers.
    Type: Application
    Filed: January 26, 2011
    Publication date: December 27, 2012
    Inventors: Prasad Muppa, Ron Postma, Caspar Schoolderman, Sandra Rens, Kostas Stoitsas
  • Publication number: 20120330042
    Abstract: Processes and compositions are provided for epoxidizing an olefinically unsaturated compound. In one embodiment, a process is provided for reacting an olefinically unsaturated compound with an oxidant in the presence of a catalyst at acidic conditions, wherein the catalyst is activated prior to the reaction at a pH that is higher than the pH during the reaction.
    Type: Application
    Filed: January 26, 2011
    Publication date: December 27, 2012
    Inventors: Prasad Muppa, Mark Kapellen, Caspar Schoolderman
  • Publication number: 20120289722
    Abstract: A process for the manufacture of propylene oxide (“PO”) by catalytic oxidation of propylene with an oxidant wherein the catalytic oxidation is performed in an aqueous reaction medium, comprising water with less than 10% by volume of cosolvents, wherein a water-soluble manganese complex is used as oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear species of the general formula (I): [LMnX3]Y ??(I) or a binuclear species of the general formula (II): [LMn(?-X)3MnL]Y2 ??(II) wherein Mn is a manganese; L or each L independently is a polydentate ligand, each X independently is a coordinating species and each ?-X independently is a bridging coordinating species, whereas Y is an non-coordinating counterion, and wherein the catalytic oxidation is carried out at a pH in the range of from 1.5 to 6.0.
    Type: Application
    Filed: November 24, 2010
    Publication date: November 15, 2012
    Inventors: Prasad Muppa, Caspar Schoolderman, Sandra Rens Van Der Lee, Ron Postma