Patents by Inventor Fandongkun MENG

Fandongkun MENG 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 treating copper-containing waste etching solution
    Patent number: 11939229
    Abstract: The present invention provides a method for treating a copper-containing waste etching solution, which includes: preparing basic copper chloride nanometer seed crystals and synthesizing basic copper chloride mono-crystals; making an acidic waste etching solution subjected to agglomeration reaction with an ammonium-containing solution and slurry containing the basic copper chloride mono-crystals to obtain basic copper chloride crystal particles and copper-removed waste solution; making an alkaline waste etching solution react with sulfuric acid to obtain a copper sulfate mixed solution; and then evaporating, concentrating, cooling and crystallizing the copper sulfate mixed solution obtained by the reaction of the alkaline waste etching solution and the sulfuric acid in sequence to obtain copper sulfate pentahydrate solids.
    Type: Grant
    Filed: November 18, 2022
    Date of Patent: March 26, 2024
    Assignee: Central South University
    Inventors: Zhang Lin, Xu Yan, Xueming Liu, Fandongkun Meng, Yanjie Liang
  • METHOD FOR TREATING COPPER-CONTAINING WASTE ETCHING SOLUTION
    Publication number: 20230166979
    Abstract: The present invention provides a method for treating a copper-containing waste etching solution, which includes: preparing basic copper chloride nanometer seed crystals and synthesizing basic copper chloride mono-crystals; making an acidic waste etching solution subjected to agglomeration reaction with an ammonium-containing solution and slurry containing the basic copper chloride mono-crystals to obtain basic copper chloride crystal particles and copper-removed waste solution; making an alkaline waste etching solution react with sulfuric acid to obtain a copper sulfate mixed solution; and then evaporating, concentrating, cooling and crystallizing the copper sulfate mixed solution obtained by the reaction of the alkaline waste etching solution and the sulfuric acid in sequence to obtain copper sulfate pentahydrate solids.
    Type: Application
    Filed: November 18, 2022
    Publication date: June 1, 2023
    Applicant: Central South University
    Inventors: Zhang LIN, Xu YAN, Xueming LIU, Fandongkun MENG, Yanjie LIANG