Patents by Inventor Qiuhong Ai

Qiuhong Ai 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: 20240150274
    Abstract: A method for producing adipic acid and cyclohexanone oxime from cyclohexane is provided. Cyclohexane and NOx undergo oxidation-nitration reaction to produce a mixture of adipic acid, nitrocyclohexane, nitrogen oxides and by-product A, from which adipic acid and nitrocyclohexane are separated. The nitrocyclohexane is catalytically hydrogenated with hydrogen to produce cyclohexanone oxime and a small amount of cyclohexylamine, where cyclohexanone oxime is collected, and the cyclohexylamine is partially oxidized with molecular oxygen to obtain cyclohexanone oxime and by-product B. Without separation, or after removing part or all of water from the reaction mixture, under the action of a catalyst, the reaction mixture undergoes hydrogenation and amination simultaneously or sequentially, or the hydrogenation alone, and separation to give cyclohexanone oxime.
    Type: Application
    Filed: August 15, 2023
    Publication date: May 9, 2024
    Inventors: He'an LUO, Kuiyi YOU, Jian JIAN, Pingle LIU, Wenjin NI, Qiuhong AI
  • Publication number: 20230104925
    Abstract: A preparation method and use of a novel pure inorganic solid silicon-based sulfonic acid and/or phosphoric acid catalytic material are disclosed. The surface hydroxyl-rich metasilicic acid is used as the raw material, and by using a sulfonating reagent and/or phosphoric acid, the sulfonic acid group and/or the phosphoric acid group are bonded to the inorganic silicon material by chemical bonding to obtain a pure inorganic solid silicon-based sulfonic acid and/or phosphoric acid catalytic material. The catalytic material can be widely used in many acid-catalyzed organic reactions such as isomerization, esterification, alkylation, hydroamination of olefins, condensation, nitration, etherification, multi-component reactions and oxidation reactions.
    Type: Application
    Filed: June 9, 2020
    Publication date: April 6, 2023
    Inventors: Hean Luo, Kuiyi You, Yibai Zeng, Jingbin Wen, Yaqing Zhang, Xinya Yuan, Qiuhong Ai