Patents by Inventor DAIXIONG CHEN

DAIXIONG CHEN 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).

  • Preparation of copper(II)-ammonia complex ion sulfidization activator and sulfidization flotation method for copper oxide ore
    Patent number: 11618689
    Abstract: The disclosure relates to mineral processing, and more particularly to a copper(II)-ammonia complex ion sulfidization activator, and its preparation and application. A molar ratio of NH3 to Cu2+ in the active ingredient of the copper(II)-ammonia complex ion sulfidization activator is 2:1-4:1. The preparation method includes: dropwise adding an ammonia solution to a copper salt solution; and adjusting the mixture to pH 6-7.2 with dilute sulfuric acid to obtain the copper(II)-ammonia complex ion sulfidization activator. During the sulfidization flotation for the copper oxide ore, the copper(II)-ammonia complex ion sulfidization activator is added and mixed uniformly with the ore slurry prior to the introduction of the sulfidizing agent.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: April 4, 2023
    Assignees: HUNAN RESEARCH INSTITUTE FOR NONFERROUS METALS, Central South University
    Inventors: Daixiong Chen, Chenyang Zhang, Wei Sun, Bo Hu, Jianyu Zhu, Mengfei Liu, Qiqi Zhou, Yanhong Dong
  • COPPER(II)-AMMONIA COMPLEX ION SULFIDIZATION ACTIVATOR, PREPARATION AND APPLICATION THEREOF
    Publication number: 20210039956
    Abstract: The disclosure relates to mineral processing, and more particularly to a copper(II)-ammonia complex ion sulfidization activator, and its preparation and application. A molar ratio of NH3 to Cu2+ in the active ingredient of the copper(II)-ammonia complex ion sulfidization activator is 2:1-4:1. The preparation method includes: dropwise adding an ammonia solution to a copper salt solution; and adjusting the mixture to pH 6-7.2 with dilute sulfuric acid to obtain the copper(II)-ammonia complex ion sulfidization activator. During the sulfidization flotation for the copper oxide ore, the copper(II)-ammonia complex ion sulfidization activator is added and mixed uniformly with the ore slurry prior to the introduction of the sulfidizing agent.
    Type: Application
    Filed: August 3, 2020
    Publication date: February 11, 2021
    Inventors: DAIXIONG CHEN, CHENYANG ZHANG, WEI SUN, BO HU, JIANYU ZHU, MENGFEI LIU, QIQI ZHOU, Yanhong DONG