Patents by Inventor Denghao Min

Denghao Min 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 PENTACHLOROPYRIDINE BY UTIILIZING DCTF RECTIFYING SHORT STEAMING RESIDUES
    Publication number: 20180194728
    Abstract: A method for preparing pentachloropyridine by utilizing DCTF rectifying short steaming residues, comprising the following steps: converting polymers in the residues through in situ catalytic cracking and vacuum distillation by using the catalytic degradation function of a catalyst formed by aluminum oxide, silicon oxide, zirconia, 4A zeolite, magnesium oxide, mordenite and HZSM-5 zeolite on the polymers in the DCTF rectifying short steaming residues into small molecular compounds and obtaining pentachloropyridine-containing crude oil; washing the pentachloropyridine-containing crude oil by using an aqueous solution of an alkaline assistant formed by sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate and sodium hydroxide, carrying out reduced pressure rectification, refrigerating crystallization, vacuum filtration or centrifuging separation, solvent washing, and vacuum drying method sequentially to obtain a pentachloropyridine product with a mass percentage c
    Type: Application
    Filed: January 12, 2017
    Publication date: July 12, 2018
    Inventors: Zhaosheng Cai, Denghao Min, Cheng Ding, Xuemei Zhu, Huaihong Zhang
  • Method for preparing pentachloropyridine by utilizing DCTF rectifying short steaming residues
    Patent number: 10017473
    Abstract: A method for preparing pentachloropyridine by utilizing DCTF rectifying short steaming residues, comprising the following steps: converting polymers in the residues through in situ catalytic cracking and vacuum distillation by using the catalytic degradation function of a catalyst formed by aluminum oxide, silicon oxide, zirconia, 4A zeolite, magnesium oxide, mordenite and HZSM-5 zeolite on the polymers in the DCTF rectifying short steaming residues into small molecular compounds and obtaining pentachloropyridine-containing crude oil; washing the pentachloropyridine-containing crude oil by using an aqueous solution of an alkaline assistant formed by sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, ammonium bicarbonate and sodium hydroxide, carrying out reduced pressure rectification, refrigerating crystallization, vacuum filtration or centrifuging separation, solvent washing, and vacuum drying method sequentially to obtain a pentachloropyridine product with a mass percentage c
    Type: Grant
    Filed: January 12, 2017
    Date of Patent: July 10, 2018
    Inventors: Zhaosheng Cai, Denghao Min, Cheng Ding, Xuemei Zhu, Huaihong Zhang