Patents by Inventor Xiuqin Dong

Xiuqin Dong 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).

  • Publication number: 20250120306
    Abstract: Provided are a triarylamine compound and an organic electroluminescent device thereof, which specifically relate to the field of organic electroluminescent materials. The triarylamine compound has high hole mobility, good thermal stability and great film formability, and when applied to the hole transport layer of an organic electroluminescent device, can reduce the energy potential barrier in a hole injection process, improve hole injection efficiency so that the hole transport rate is balanced with electron transport, increase the recombination probability of excitons in a light-emitting layer, and achieve the maximum recombination of carriers, thereby improving the luminescence efficiency of the device and extending the lifetime of the device. Therefore, the compound has great application and commercial values in the application of OLED devices and possesses a good industrialization prospect.
    Type: Application
    Filed: April 29, 2024
    Publication date: April 10, 2025
    Inventors: Xiuqin DONG, Wenting ZHOU, Xiqing LIU
  • Patent number: 11939286
    Abstract: The present disclosure relates to a method for producing vinyl acetate, comprising a vinyl acetate synthesis process, a vinyl acetate refining process and a separation process of vinyl acetate and ethyl acetate, including an acetic acid evaporator, an oxygen mixer, a vinyl acetate synthesis reactor, a first gas separating tower, a second gas separating tower, a recovered gas compressor, a water washing tower, an absorption tower and a desorption tower, a recycling gas compressor; the vinyl acetate refining process comprising an acetic acid tower, a crude VAC tower, and a fine VAC tower, a rectifying tower, an ethyl acetate tower, a water phase receiving tank, an extracting and rectifying tower and an ethyl acetate phase separator.
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: March 26, 2024
    Assignee: TIANJIN UNIVERSITY
    Inventors: Minhua Zhang, Zhongfeng Geng, He Dong, Hao Gong, Yingzhe Yu, Shenghua Qian, Xiuqin Dong
  • Publication number: 20230312452
    Abstract: The present disclosure relates to a method for producing vinyl acetate, comprising a vinyl acetate synthesis process, a vinyl acetate refining process and a separation process of vinyl acetate and ethyl acetate, including an acetic acid evaporator, an oxygen mixer, a vinyl acetate synthesis reactor, a first gas separating tower, a second gas separating tower, a recovered gas compressor, a water washing tower, an absorption tower and a desorption tower, a recycling gas compressor; the vinyl acetate refining process comprising an acetic acid tower, a crude VAC tower, and a fine VAC tower, a rectifying tower, an ethyl acetate tower, a water phase receiving tank, an extracting and rectifying tower and an ethyl acetate phase separator.
    Type: Application
    Filed: September 23, 2021
    Publication date: October 5, 2023
    Inventors: Minhua ZHANG, Zhongfeng GENG, He DONG, Hao GONG, Yingzhe YU, Shenghua QIAN, Xiuqin DONG
  • Publication number: 20230312456
    Abstract: The present disclosure relates to a vinyl acetate production process and device. By arranging a stabilizing process, an acetic acid recovery system and a desorption system and device, the composition of circulating gas is changed, the explosion range is narrowed, the volume fraction of maximum permissible oxygen at an inlet of a reactor is increased under the same production load and the same catalyst condition, the safety of the production process is improved, and the conversion per pass across the reaction is increased; and meanwhile, a material separation sequence is reasonably segmented according to an actual production condition. The present disclosure arranges a first gas separating tower which recovers surplus heat of reaction gas, reduces the energy consumption of the system, and therefore the energy consumption throughout the production flow process is reduced; the present disclosure further arranges the acetic acid recovery system.
    Type: Application
    Filed: September 23, 2021
    Publication date: October 5, 2023
    Inventors: Minhua ZHANG, Yingzhe YU, Hao GONG, He DONG, Sheng WANG, Cheng LIU, Xiuqin DONG
  • Publication number: 20230025656
    Abstract: Provided are a triarylamine derivative and an organic electroluminescent device thereof, which relate to the technical field of organic electroluminescence. The triarylamine derivative has a relatively high triplet energy level, high hole mobility, a high refractive index and good film formability and thermal stability and can effectively reduce the driving voltage of the organic electroluminescent device, improve the luminescence efficiency, and extend the service life of the device when applied to the organic electroluminescent device. The triarylamine derivative has a good application effect and a good industrialization prospect in the organic electroluminescent device.
    Type: Application
    Filed: June 13, 2022
    Publication date: January 26, 2023
    Inventors: Hui Liu, Yuhe Miao, Xiqing Liu, Xiuqin Dong
  • Publication number: 20140303398
    Abstract: The present invention discloses a method for producing vinyl acetate. Inert gas is introduced into cycling gas to improve the explosion limit of oxygen, enlarge a stable area of a reaction system and improve the oxygen concentration of the reaction system, thus reducing the reaction temperature, prolonging the service life of a catalyst, and improving the selectivity of the vinyl acetate. The inert gas is nitrogen or a mixture of nitrogen and methane. The concentration of the inert gas at the inlet of a reactor is 8 to 30 mol %. The molar concentration of the oxygen at the inlet of the reactor is 10.5 to 12 mol %.
    Type: Application
    Filed: November 6, 2012
    Publication date: October 9, 2014
    Applicants: Tianjin University
    Inventors: Minhua Zhang, Xiuqin Dong, Minli Tao, Cheng Liu, Shengli Ouyang, Haoxi Jiang, Jing Ma, Guiming Li