Patents by Inventor Yuhao MA

Yuhao MA 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 the production of aminopropylmethylethanolamine
    Patent number: 9428446
    Abstract: A new process for the production of APMMEA (aminopropylmethylethanolamine) is proposed. This process comprises at least 2 steps in which MEAPN (monomethylethanolaminopropionitrile) is first produced from MMEA (monomethylethanol amine) and ACN (acrylonitrile) and then said MEAPN is hydrogenated to obtain the corresponding amine, the APMMEA compound. APMMEA may be then eventually purified by several known process, notably by distillation.
    Type: Grant
    Filed: February 10, 2012
    Date of Patent: August 30, 2016
    Assignee: Rhodia Operations
    Inventors: Yuhao Ma, Peijun Xu, Jieping Chen, Philippe Leconte, Ann Mu
  • Process for the production of aminopropylmethylethanolamine
    Publication number: 20150329479
    Abstract: A new process for the production of APMMEA (aminopropylmethylethanolamine) is proposed. This process comprises at least 2 steps in which MEAPN (monomethylethanolaminopropionitrile) is first produced from MMEA (monomethylethanol amine) and ACN (acrylonitrile) and then said MEAPN is hydrogenated to obtain the corresponding amine, the APMMEA compound. APMMEA may be then eventually purified by several known process, notably by distillation.
    Type: Application
    Filed: February 10, 2012
    Publication date: November 19, 2015
    Applicant: RHODIA OPERATIONS
    Inventors: Yuhao MA, Peijun XU, Jieping CHEN, Philippe LECONTE, Ann MU