Patents Assigned to ABA CHEMICALS (NANTONG) LIMITED
  • Method of preparing 3-fluoroalkyl-1 substituted pyrazol-4-carboxylic acid by air oxidation
    Patent number: 11230529
    Abstract: Provided is a method of preparing 3-fluoroalkyl-1-substituted pyrazol-4-carboxylic acid by air oxidation. The methoduses 3-fluoroalkyl-1-substituted pyrazol-4-formaldehyde as raw material for reaction in a neutral or alkaline condition under the action of a catalyst and with air as an oxidizing agent, to obtain 3-fluoroalkyl-1-substituted pyrazol-4-carboxylic acid. The method employs a mild, safe and clean reaction, and is suitable for industrial mass production.
    Type: Grant
    Filed: February 19, 2014
    Date of Patent: January 25, 2022
    Assignee: ABA CHEMICALS (NANTONG) LIMITED
    Inventors: Zhigang Lin, Yueheng Jiang, Tong Cai