Patents Assigned to CHINESE ACADEMY OF AGRICULTURAL SCIENCES INSTITUTE OF AGRICULTURAL RESOURCES AND REGIONAL PLANNING
  • Method for producing controlled-release fertilizer coated with polyurethane
    Patent number: 9416064
    Abstract: A method for producing controlled-release fertilizer coated with polyurethane is provided, wherein granular fertilizer is preheated under fluidized state in a fluidized bed; the surface of the granular fertilizer is pretreated after liquid paraffin being atomized; polyol and isocyanate are mixed in a nozzle, then atomized and sprayed onto the surface of the granular fertilizer; after the reaction materials are added, liquid paraffin is added for surface release treatment.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: August 16, 2016
    Assignee: CHINESE ACADEMY OF AGRICULTURAL SCIENCES INSTITUTE OF AGRICULTURAL RESOURCES AND REGIONAL PLANNING
    Inventors: Xiangdong Yang, Bingqiang Zhao, Yanting Li, Juan Li, Zhian Lin, Liang Yuan