Patents by Inventor Alan E. Sopchik

Alan E. Sopchik 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).

  • Method for recovery of methacrolein and methanol from methacrolein dimethylacetal
    Patent number: 11098000
    Abstract: A process for recovering methacrolein and methanol from methacrolein dimethyl acetal. The method comprises a step of contacting a mixture comprising methyl methacrylate and methacrolein dimethyl acetal with a strong acid ion exchange resin in the presence of water. The mixture comprises no more than 0.2 wt % sodium methacrylate.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: August 24, 2021
    Assignees: Dow Global Technologies LLC, Rohm andHaas Company
    Inventors: Alan E. Sopchik, William G. Worley, Rajesh Shah
  • METHOD FOR RECOVERY OF METHACROLEIN AND METHANOL FROM METHACROLEIN DIMETHYLACETAL
    Publication number: 20210061746
    Abstract: A process for recovering methacrolein and methanol from methacrolein dimethyl acetal. The method comprises a step of contacting a mixture comprising methyl methacrylate and methacrolein dimethyl acetal with a strong acid ion exchange resin in the presence of water. The mixture comprises no more than 0.2 wt % sodium methacrylate.
    Type: Application
    Filed: September 4, 2018
    Publication date: March 4, 2021
    Inventors: Alan E. Sopchik, William G. Worley, Rajesh Shah
  • Methods of using N-oxyl polymerization inhibitor in a wash settler for preparing methyl methacrylate
    Patent number: 10640449
    Abstract: The present invention provides methods comprising washing or, preferably, washing and neutralizing a sulfur acid containing crude MMA stream to generate a two phase stream containing at least methacrylic acid, methacrylamide (MAM), water and methanol, and an organic component containing methyl methacrylate and thereby form an aqueous component; including in any of the organic component, the aqueous component of a neutralized sulfur acid containing crude methyl methacrylate (MMA) stream or the organic component of a neutralized sulfur acid containing crude methyl methacrylate (MMA) stream one or more N-oxyl compound polymerization inhibitor; followed by separating the aqueous component from the organic component, thereby forming a treated crude MMA stream and an aqueous stream to remove residual (meth) acrylic acid.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: May 5, 2020
    Assignees: Dow Global Technologies LLC, Rohm and Haas Company
    Inventors: Joseph Atkins, Philippe P. Maillot, Joy L. Mendoza, Alan E. Sopchik, Mingyu Ye
  • METHODS OF USING N-OXYL POLYMERIZATION INHIBITOR IN A WASH SETTLER FOR PREPARING METHYL METHACRYLATE
    Publication number: 20190345093
    Abstract: The present invention provides methods comprising washing or, preferably, washing and neutralizing a sulfur acid containing crude MMA stream to generate a two phase stream containing at least methacrylic acid, methacrylamide (MAM), water and methanol, and an organic component containing methyl methacrylate and thereby form an aqueous component; including in any of the organic component, the aqueous component of a neutralized sulfur acid containing crude methyl methacrylate (MMA) stream or the organic component of a neutralized sulfur acid containing crude methyl methacrylate (MMA) stream one or more N-oxyl compound polymerization inhibitor; followed by separating the aqueous component from the organic component, thereby forming a treated crude MMA stream and an aqueous stream to remove residual (meth) acrylic acid.
    Type: Application
    Filed: December 8, 2017
    Publication date: November 14, 2019
    Inventors: Joseph Atkins, Philippe P. Maillot, Joy L. Mendoza, Alan E. Sopchik, Mingyu Ye
  • Process for purifying (meth)acrylic acid
    Patent number: 9517999
    Abstract: A process for producing a grade of (meth)acrylic acid having residual formaldehyde levels of under 100 parts per million.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: December 13, 2016
    Assignee: Rohm and Haas Company
    Inventors: Alan E. Sopchik, Stephen T. Cohn
  • PROCESS FOR PURIFYING (METH)ACRYLIC ACID
    Publication number: 20150368177
    Abstract: A process for producing a grade of (meth)acrylic acid having residual formaldehyde levels of under 100 parts per Million.
    Type: Application
    Filed: March 7, 2014
    Publication date: December 24, 2015
    Inventors: Alan E. Sopchik, Stephen T. Cohn