Patents by Inventor Baoyuan Sun

Baoyuan Sun 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).

  • Catalyst for the synthesis of dimethyl carbonate from urea and methanol, preparation and use thereof
    Patent number: 7271120
    Abstract: A catalyst for the preparation of dimethyl carbonate from urea and methanol having a composition on weight base of: active component of from 20 to 50 wt %, and carrier of from 80 to 50 wt %, and prepared by equal-volume spraying and impregnating method is disclosed. The method for the synthesis of dimethyl carbonate can be carried out in a catalytic rectification reactor, said method comprising: (1) dissolving urea in methanol to form a methanol solution of urea; and (2) feeding the methanol solution of urea and methanol counter-currently into the reaction zone, wherein the reaction is carried out at conditions including reaction temperature of from 120° C. to 250° C., reaction pressure of from 0.1 MPa to 5 MPa, kettle bottom temperature of from 70° C. to 210° C., stripping section temperature of from 70° C. to 250° C., rectifying section temperature of from 70° C. to 280° C., and reflux ratio of from 1:1 to 20:1.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: September 18, 2007
    Assignees: Institute of Coal Chemistry, Chinese Academy of Sciences, Feicheng Acid Chemicals Co., Ltd.
    Inventors: Yuhan Sun, Wei Wei, Ning Zhao, Baoyuan Sun, Bingsheng Zhang, Yanjun Chen
  • Catalyst for the synthesis of dimethyl carbonate from urea and methanol, preparation and use thereof
    Publication number: 20060047136
    Abstract: A catalyst for the preparation of dimethyl carbonate from urea and methanol having a composition on weight base of: active component of from 20 to 50 wt %, and carrier of from 80 to 50 wt %, and prepared by equal-volume spraying and impregnating method is disclosed. The method for the synthesis of dimethyl carbonate can be carried out in a catalytic rectification reactor, said method comprising: (1) dissolving urea in methanol to form a methanol solution of urea; and (2) feeding the methanol solution of urea and methanol counter-currently into the reaction zone, wherein the reaction is carried out at conditions including reaction temperature of from 120° C. to 250° C., reaction pressure of from 0.1 MPa to 5 MPa, kettle bottom temperature of from 70° C. to 210° C., stripping section temperature of from 70° C. to 250° C., rectifying section temperature of from 70° C. to 280° C., and reflux ratio of from 1:1 to 20:1.
    Type: Application
    Filed: August 22, 2005
    Publication date: March 2, 2006
    Inventors: Yuhan Sun, Wei Wei, Ning Zhao, Baoyuan Sun, Bingsheng Zhang, Yanjun Chen