Patents by Inventor Haoxi Jiang

Haoxi Jiang 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: 20250197330
    Abstract: The present disclosure relates to a bisphenol A preparation process and device thereof. Each stage of reaction system includes a cooler and reactors, each with four sections, the reactors are filled with bisphenol A synthetic resin catalysts before startup operation, and filling proportions of the catalysts are as follows: ? of the catalysts for the first-section reactor, ? for the second-section reactor, the full amount for the third-section reactor and the full amount for the fourth-section reactor. The three reactors operate in series connection through valves, the reactor with the deactivated catalyst is cut out and the reactor to be used is cut in to maintain the three reactors operating in series every time the system operates ? of the service life of the catalyst, and the process can provide a larger air speed, which is beneficial to eliminating the influence of external diffusion, thereby obtaining higher product benefits.
    Type: Application
    Filed: October 23, 2024
    Publication date: June 19, 2025
    Inventors: Minhua ZHANG, Yingzhe Yu, Hao Gong, He Dong, Feng Shi, Haoxi Jiang
  • Publication number: 20250122138
    Abstract: The present disclosure relates to a production process and device for synthesizing bisphenol A by a resin method, including a condensation reaction unit for performing a catalytic condensation reaction between phenol and acetone to generate bisphenol A, a first-stage adduct crystallization unit for mixing a concentrated solution with adduct crystals recycled after melting and then performing adduct crystallization, a liquid-phase dephenolization unit for melting an adduct to yield a bisphenol A product, a secondary adduct crystallization unit for recycling phenol and bisphenol A from a mother solution, a solvent recycling unit for recycling unreacted phenol and unreacted acetone, and discharging phenol-containing process water for sewage treatment, and a cracking and rearrangement unit for recycling the phenol from the mother solution, and convert bisphenol A, 2,4-bisphenol A and the like therein in the mother solution into the bisphenol A.
    Type: Application
    Filed: September 26, 2024
    Publication date: April 17, 2025
    Inventors: Minhua ZHANG, Hao GONG, He DONG, Feng SHI, Zhongfeng GENG, Yingzhe YU, Haoxi JIANG
  • Patent number: 12071387
    Abstract: The present disclosure relates to a thermal coupling method for preparing ethylene by ethanol dehydration and device thereof. The device includes an ethanol dehydration reaction system, a quenching compression system, an alkaline washing system, a molecular sieve drying system and an ethylene purification and propylene refrigeration cycle system; ethanol dehydration reaction products in the ethanol dehydration reaction system serve as a heat source for preheating, vaporization and superheating of a raw material of ethanol; tower bottoms of an evaporation tower in the quenching compression system serve as a heat source for preheating of a feed stream of the evaporation tower and heating of an overhead gas of a quenching tower; products of ethylene in the alkaline washing system serve as a cold source for cooling of crude ethylene.
    Type: Grant
    Filed: June 19, 2023
    Date of Patent: August 27, 2024
    Assignee: TIANJIN UNIVERSITY
    Inventors: Minhua Zhang, Hao Gong, He Dong, Feng Shi, Fang Meng, Yingzhe Yu, Haoxi Jiang
  • Publication number: 20240067583
    Abstract: The present disclosure relates to a thermal coupling method for preparing ethylene by ethanol dehydration and device thereof. The device includes an ethanol dehydration reaction system, a quenching compression system, an alkaline washing system, a molecular sieve drying system and an ethylene purification and propylene refrigeration cycle system; ethanol dehydration reaction products in the ethanol dehydration reaction system serve as a heat source for preheating, vaporization and superheating of a raw material of ethanol; tower bottoms of an evaporation tower in the quenching compression system serve as a heat source for preheating of a feed stream of the evaporation tower and heating of an overhead gas of a quenching tower; products of ethylene in the alkaline washing system serve as a cold source for cooling of crude ethylene.
    Type: Application
    Filed: June 19, 2023
    Publication date: February 29, 2024
    Inventors: Minhua ZHANG, Hao GONG, He DONG, Feng SHI, Fang MENG, Yingzhe YU, Haoxi JIANG
  • 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