Patents by Inventor Weiqin Zheng

Weiqin Zheng 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).

  • Backflow cascade novel process for producing lithium-7 isotope
    Patent number: 9963760
    Abstract: Provided is a backflow cascade novel process for producing a lithium-7 isotope. The process comprises an upper backflow section, an extraction section, an enrichment section, a lower backflow section, and a product acquiring section. Upper backflow phase-conversion liquid and lower backflow phase-conversion liquid are respectively added to the upper backflow section and the lower backflow section, and upper backflow phase-conversion liquid and lower backflow phase-conversion liquid of the lithium material are controlled; the product is precisely acquired in the product acquiring section; an organic phase is added to the upper backflow section, and is recycled in the lower backflow section. By means of cascade connection with a high-performance liquid separator, environmental protection, high efficiency, and multi-level enrichment of the lithium-7 isotope are achieved, and a high-abundance lithium-7 isotope product is obtained.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: May 8, 2018
    Assignee: Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
    Inventors: Jinbo Hu, Wei Zhang, Weiqin Zheng, Guanghua Chen, Xiao Shi, Yongchang Xu, Honggui Lv, Chengye Yuan
  • BACKFLOW CASCADE NOVEL PROCESS FOR PRODUCING LITHIUM-7 ISOTOPE
    Publication number: 20160215363
    Abstract: Provided is a backflow cascade novel process for producing a lithium-7 isotope. The process comprises an upper backflow section, an extraction section, an enrichment section, a lower backflow section, and a product acquiring section. Upper backflow phase-conversion liquid and lower backflow phase-conversion liquid are respectively added to the upper backflow section and the lower backflow section, and upper backflow phase-conversion liquid and lower backflow phase-conversion liquid of the lithium material are controlled; the product is precisely acquired in the product acquiring section; an organic phase is added to the upper backflow section, and is recycled in the lower backflow section. By means of cascade connection with a high-performance liquid separator, environmental protection, high efficiency, and multi-level enrichment of the lithium-7 isotope are achieved, and a high-abundance lithium-7 isotope product is obtained.
    Type: Application
    Filed: March 28, 2014
    Publication date: July 28, 2016
    Applicant: Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences
    Inventors: Jinbo Hu, Wei Zhang, Weiqin Zheng, Guanghua Chen, Xiao Shi, Yongchang Xu, Honggui Lv, Chengye Yuan