Patents Assigned to Institute of Coal Chemistry, Chinese Academy of Sciences
  • Patent number: 10844287
    Abstract: The present invention provides a method for preparing gasoline and aromatics by using Fischer-Tropsch synthesis exhaust. The method includes conducting an olefin conversion reaction on Fischer-Tropsch synthesis exhaust under the action of a first molecular sieve catalyst. A first refrigeration or cooling is conducted on an obtained product to obtain ultralow sulfur-containing gasoline and first-stage reaction gas. An alkaline aromatization reaction is conducted on the first-stage reaction gas under the action of a second molecular sieve catalyst. A second refrigeration or cooling is conducted on an obtained product to obtain aromatics. After the olefin conversion reaction, a gasoline component is separated and residual alkanes enter a second-stage fluidized bed reactor for the alkane aromatization reaction to produce aromatics.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: November 24, 2020
    Assignee: INSTITUTE OF COAL CHEMISTRY, CHINESE ACADEMY OF SCIENCES
    Inventors: Weibin Fan, Jianguo Wang, Zhiwei Wu, Mei Dong, Zhangfeng Qin, Huaqing Zhu, Junfen Li, Weiyong Jiao
  • Publication number: 20200339495
    Abstract: The disclosure relates to a process for continuously producing polyoxymethylene dimethyl ethers at low temperature, pertains to the technical field of polyoxymethylene dimethyl ether preparation processes, and solves the technical problem of continuous production of polyoxymethylene dimethyl ether. A membrane separation element with precisely controlled pores in membrane is used to realize a direct separation of the feedstocks from the catalyst within the reactor, and effectively reduce the permeation resistance of the separation membrane tube. By oppositely switching the flowing direction of liquid reaction materials, the adhesion of the catalyst to the separation membrane tube is inhibited, and some particles stuck in separation membrane tube are removed, which ensures the continuous operation of the reaction process and allows a molecular sieve catalyst to exhibit its advantage of long catalytic life.
    Type: Application
    Filed: April 28, 2020
    Publication date: October 29, 2020
    Applicants: Institute of Coal Chemistry, Chinese Academy of Sciences, Shanxi Lu'an Mining (Group) Co., Ltd.
    Inventors: Weibin FAN, Guofu WANG, Jiaqi GUO, Jianguo WANG, Mei DONG, Pengfei WANG, Youliang CEN, Yaning XIAO, Dongfei WANG, Shoujing SUN, Weilin WANG, Juncai ZHANG, Min ZHANG, Yunhong LI
  • Publication number: 20200338516
    Abstract: A continuous slurry-bed tank reactor, comprising a tank reactor body, an agitator, and tubular separation membranes. A method of using the continuous slurry-bed tank reactor comprising adding a catalyst, feeding reactants, stopping feeding the reactants, starting a heating system, changing directions of the reactants flowing through the tubular separation membranes.
    Type: Application
    Filed: April 15, 2020
    Publication date: October 29, 2020
    Applicants: Institute of Coal Chemistry, Chinese Academy of Sciences, Shanxi Lu'an Mining (Group) Co., Ltd.
    Inventors: Weibin Fan, Guofu Wang, Jiaqi Guo, Jianguo Wang, Mei Dong, Youliang Cen, Yaning Xiao, Dongfei Wang, Shoujing Sun, Weilin Wang, Juncai Zhang, Min Zhang, Yunhong Li
  • 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