Patents Assigned to CATL-SICONG NOVEL MATERIALS CO., LTD
  • Publication number: 20240017999
    Abstract: A method for recovering raw and auxiliary materials in the production of lithium bis(fluorosulfonyl)imide is described. The method includes one or more different recovery sections A, B, C, D and/or E, corresponding to the recovery and post-treatment of the raw and auxiliary materials such as triethylamine, a fluoride ion, an ester solvent, and a crystallization liquid respectively used in the production of lithium bis(fluorosulfonyl)imide. The method for recovering raw and auxiliary materials of the present application enables the production of lithium bis(fluorosulfonyl)imide to have significantly improved economic efficiency and environmental protection.
    Type: Application
    Filed: August 3, 2023
    Publication date: January 18, 2024
    Applicants: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, CATL-SICONG NOVEL MATERIALS CO., LTD
    Inventors: Sicong CHENG, Qisen HUANG
  • Publication number: 20230387467
    Abstract: The present application provides a method for preparing lithium bis(fluorosulfonyl)imide, which may include the following steps: (a) a synthesis step; (b) an evaporation step; (c) an extraction step; (d) an alkalinization step; (e) a dehydration step; (f) a desolventization step; (g) a crystallization step; and (h) a drying step; lithium bis(fluorosulfonyl)imide prepared by the method, an electrolytic solution containing the lithium bis(fluorosulfonyl)imide, and a secondary battery thereof.
    Type: Application
    Filed: August 8, 2023
    Publication date: November 30, 2023
    Applicants: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, CATL-SICONG NOVEL MATERIALS CO., LTD
    Inventors: Sicong CHENG, Qisen HUANG
  • Publication number: 20230378542
    Abstract: A method for preparing lithium bis(fluorosulfonyl)imide, including (1) adding an organic solvent and an absorbent A to a reaction kettle, then adding part of an ammonia source, and finally adding SO2X2 and a remaining ammonia source simultaneously for reaction, to obtain a solution of a salt (SO2F—NH—SO2F)·A containing bis(fluorosulfonyl)imide and the absorbent A, where in the SO2X2, X is independently fluorine or chlorine; (2) performing filtration, concentration and washing on the solution obtained in step (1) to obtain a purified salt (SO2F—NH—SO2F)·A of the bis(fluorosulfonyl)imide and the absorbent A; (3) adding a lithium source to the purified salt (SO2F—NH—SO2F)·A of the bis(fluorosulfonyl)imide and the absorbent A obtained in step (2) for reaction to obtain a solution containing lithium bis(fluorosulfonyl)imide; and (4) performing dehydration, concentration, crystallization with a non-aqueous poor solvent, and drying on the solution obtained in step (3) to obtain the lithium bis(fluorosulfonyl)imide i
    Type: Application
    Filed: August 7, 2023
    Publication date: November 23, 2023
    Applicants: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, CATL-SICONG NOVEL MATERIALS CO., LTD
    Inventors: Sicong CHENG, Qisen HUANG
  • Publication number: 20230348272
    Abstract: The present application provides a method of preparing sulfuryl fluoride, including the following steps of: S1) reacting sulfur trioxide steam with barium fluoride to acquire a mixed gas of barium sulphate and sulfuryl fluoride; S2) pickling the mixed gas acquired in step S1 with a concentrated sulfuric acid solution with a concentration of 70-98.3 wt. % to acquire a primary purified sulfuryl fluoride gas; S3) passing the primary purified sulfuryl fluoride gas acquired in step S2 through an aqueous solution with a concentration of 2-10 wt. % selected from at least one of the following: sodium sulfite, sodium bisulfite, sodium pyrosulfite, and sodium thiosulfate, to acquire a sulfuryl fluoride gas.
    Type: Application
    Filed: June 29, 2023
    Publication date: November 2, 2023
    Applicants: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED, CATL-SICONG NOVEL MATERIALS CO., LTD
    Inventors: Sicong CHENG, Qisen HUANG