Patents by Inventor Minh N. Ngo

Minh N. Ngo 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: 11401229
    Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: August 2, 2022
    Assignee: Rohm and Haas Company
    Inventors: Reetam Chakrabarti, Sarah L. Hruby, Dmitri A. Krapchetov, Minh N. Ngo, Muhunthan Sathiosatham, Mark A. Silvano
  • Publication number: 20220162149
    Abstract: A method for preparing methyl acrylate comprises: a) heating in a reaction zone a mixture comprising acrylic acid, methanol, and an acid catalyst to react and form a reaction product comprising methyl acrylate which is vaporized with other light components and then fed to a distillation zone, wherein a feed stream entering the reaction zone comprises methanol to acrylic acid in a molar ratio of greater than 1 and less than 2, and a residence time in the reaction zone ranges from 0.25 to 2 hours; b) condensing and phase-separating a distillate from the distillation zone to form an organic phase comprising methyl acrylate and an aqueous phase; c) returning a portion of the organic phase to the distillation zone as organic reflux; and d) feeding the remainder of the organic phase and the aqueous phase of the distillation zone to an extraction column to form a methanol rich aqueous effluent and an organic effluent comprising methyl acrylate.
    Type: Application
    Filed: April 2, 2020
    Publication date: May 26, 2022
    Inventors: Reetam Chakrabarti, Minh N. Ngo, James Elder
  • Publication number: 20220153679
    Abstract: A method for preparing methyl acrylate comprises heating in a reaction zone a mixture comprising acrylic acid, methanol, and an acid catalyst to react and form a reaction product comprising methyl acrylate which is vaporized with other light components and then fed to a distillation zone. A feed stream entering the reaction zone comprises methanol and acrylic acid in a molar ratio of greater than 1 and less than 2, and a residence time in the reaction zone ranges from 0.25 to 2 hours. A distillate from the distillation zone is condensed and phase-separated to form an organic phase comprising methyl acrylate and an aqueous phase. A portion of the organic phase is returned to the distillation zone as organic reflux. The remainder of the organic phase and the aqueous phase of the distillation zone is fed to an extraction column to form a methanol rich aqueous effluent and an organic effluent comprising methyl acrylate.
    Type: Application
    Filed: April 2, 2020
    Publication date: May 19, 2022
    Inventors: Reetam Chakrabarti, Minh N. Ngo, James Elder
  • Publication number: 20210403404
    Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.
    Type: Application
    Filed: May 24, 2018
    Publication date: December 30, 2021
    Inventors: Reetam Chakrabarti, Sarah L. Hruby, Dmitry A. Krapchetov, Minh N. Ngo, Muhunthan Sathiosatham, Mark A. Silvano
  • Patent number: 10836698
    Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: November 17, 2020
    Assignee: Rohm and Haas Company
    Inventors: Reetam Chakrabarti, Charles Como, Sarah L. Hruby, Dmitry A. Krapchetov, Minh N. Ngo, Muhunthan Sathiosatham, Mark A. Silvano
  • Publication number: 20200181053
    Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.
    Type: Application
    Filed: May 24, 2018
    Publication date: June 11, 2020
    Inventors: Reetam Chakrabarti, Charles Como, Sarah L. Hruby, Dmitry A. Krapchetov, Minh N. Ngo, Muhunthan Sathiosatham, Mark A. Silvano
  • Patent number: 9260368
    Abstract: A multistage process for the preparation of methacrylic acid and esters thereof via the hydrolysis of ACH, cracking the hydrolysis products, and converting the cracked products to the desired acid or ester, wherein the average temperature in the first hydrolysis reactor is from 55 C to 70 C.
    Type: Grant
    Filed: September 9, 2013
    Date of Patent: February 16, 2016
    Assignee: Rohm and Haas Company
    Inventors: Andrew M. Lemonds, Minh N. Ngo, Muhunthan Sathiosatham, Donald Lee Zolotorofe
  • Publication number: 20150259272
    Abstract: A multistage process for the preparation of methacrylic acid and esters thereof via the hydrolysis of ACH, cracking the hydrolysis products, and converting the cracked products to the desired acid or ester, wherein the average temperature in the first hydrolysis reactor is from 55 C to 70 C.
    Type: Application
    Filed: September 9, 2013
    Publication date: September 17, 2015
    Inventors: Andrew M. Lemonds, Minh N. Ngo, Muhunthan Sathiosatham, Donald Lee Zolotorofe