Patents by Inventor Herui Dou

Herui Dou 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 Preparing High Molecular Weight Polybutylene Succinate
    Publication number: 20220177643
    Abstract: A method for preparing high molecular weight polybutylene succinate includes: (a) using maleic anhydride (MAH) and C1-C4 alcohols to produce dialkyl maleates and water, in which dialkyl fumarate is calculated as dialkyl maleate of an equivalent mole. A reactive distillation process is used for the purification and obtains dialkyl maleates; (b) selective hydrogenation of those dialkyl maleates in the presence of high pressure hydrogen to produce the corresponding dialkyl succinates; (c) condensation of dialkyl succinates with mostly 1,4-butanediol (BDO) and other aliphatic diols to produce high molecular weight polybutylene succinates by adding catalysts.
    Type: Application
    Filed: December 8, 2020
    Publication date: June 9, 2022
    Inventors: Herui Dou, Xiaohang Xu, Rong Lv
  • Highly active oxide catalysts for the catalytic ketonization of carboxylic acids
    Patent number: 8748670
    Abstract: The present invention provides methods comprising reacting a first carboxylic acid or ester with a second carboxylic acid or ester in the presence of a metal oxide comprising Zr, Ce, Mn and O to produce at least one ketone.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 10, 2014
    Assignee: Massachusetts Institute of Technology
    Inventors: Herui Dou, Yuriy Roman-Leshkov