Patents by Inventor Zhaokun Cheng

Zhaokun Cheng 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 hydroxyethyl (meth) acrylate
    Patent number: 9845281
    Abstract: Hydroxyethyl (methyl)acrylate is prepared by a process of a combination of a three-stage tubular reactor and a tower reactor, wherein, firstly, a catalyst, a polymerization inhibitor and (methyl) acrylic acid are mixed until the solids are dissolved, then mixed with a part of ethylene oxide and thereafter enter into a first tubular reactor for a reaction, a reaction liquid flowing out from the first tubular reactor is mixed with a certain amount of ethylene oxide and enters into a second tubular reactor for a reaction, a reaction liquid flowing out from the second tubular reactor is then mixed with a certain amount of ethylene oxide and thereafter enters into a third tubular reactor, and a reaction liquid flowing out from the third tubular reactor is then passed through a stage of an adiabatic tower reactor and aged such that a product liquid is obtained from extraction.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: December 19, 2017
    Assignee: Wanhua Chemical Group Co., Ltd.
    Inventors: Junping Li, Haibo Chen, Lichang Zhang, Chunxian Cui, Yuan Li, Weiqi Hua, Jiansheng Ding, Junhua Zhang, Zhaokun Cheng
  • METHOD FOR PREPARING HYDROXYETHYL (METH) ACRYLATE
    Publication number: 20170183288
    Abstract: Hydroxyethyl (methyl)acrylate is prepared by a process of a combination of a three-stage tubular reactor and a tower reactor, wherein, firstly, a catalyst, a polymerization inhibitor and (methyl) acrylic acid are mixed until the solids are dissolved, then mixed with a part of ethylene oxide and thereafter enter into a first tubular reactor for a reaction, a reaction liquid flowing out from the first tubular reactor is mixed with a certain amount of ethylene oxide and enters into a second tubular reactor for a reaction, a reaction liquid flowing out from the second tubular reactor is then mixed with a certain amount of ethylene oxide and thereafter enters into a third tubular reactor, and a reaction liquid flowing out from the third tubular reactor is then passed through a stage of an adiabatic tower reactor and aged such that a product liquid is obtained from extraction.
    Type: Application
    Filed: July 29, 2014
    Publication date: June 29, 2017
    Applicant: Wanhua Chemical Group Co., Ltd.
    Inventors: Junping Li, Haibo Chen, Lichang Zhang, Chunxian Cui, Yuan Li, Weiqi Hua, Jiansheng Ding, Junhua Zhang, Zhaokun Cheng