Patents by Inventor Chengbao NI

Chengbao NI 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).

  • Process for reducing CPI in a dinitrile stream
    Patent number: 11028045
    Abstract: Disclosed is a process for removing 2-cyanocyclopentylideneimine (CPI) from a mixture containing CPI and dinitrile. The process comprises reacting CPI with an amine. The reaction may take place in the presence of water, and optionally, a catalyst. CPI is converted to products with a low volatility compared to the dinitrile.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: June 8, 2021
    Assignee: INV NYLON CHEMICALS AMERICAS, LLC
    Inventor: Chengbao Ni
  • PROCESS FOR REDUCING CPI IN A DINITRILE STREAM
    Publication number: 20190135736
    Abstract: Disclosed is a process for removing 2-cyanocyclopentylideneimine (CPI) from a mixture containing CPI and dinitrile. The process comprises reacting CPI with an amine. The reaction may take place in the presence of water, and optionally, a catalyst. CPI is converted to products with a low volatility compared to the dinitrile.
    Type: Application
    Filed: April 27, 2017
    Publication date: May 9, 2019
    Applicant: INVISTA NORTH AMERICA S.A.R.L.
    Inventor: Chengbao NI