Patents by Inventor Min-Hui YANG

Min-Hui YANG 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).

  • Method and apparatus for sequencing-batch purification of potassium nitrate from solid waste produced by glass-strengthening process
    Patent number: 8956424
    Abstract: Provided is a method and an apparatus for purifying potassium nitrate from the solid waste produced by a chemical glass-strengthening process. In the method, the solid waste is melted into a liquid waste at first. Potassium nitrate of various purity grades can be obtained by batch processing the liquid waste through stepwise cooling processes of cooling the liquid waste to a first temperature facilitating the potassium nitrate contained in the liquid waste to be crystallized at a first rate and then cooling the liquid waste to a second temperature close to the freezing point of the potassium nitrate at a second rate that is slower than the first rate. The recovered potassium nitrate from the solid waste can be recycled and reused.
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: February 17, 2015
    Assignee: National Formosa University
    Inventor: Min-Hui Yang
  • METHOD AND APPARATUS FOR SEQUENCING-BATCH PURIFICATION OF POTASSIUM NITRATE FROM SOLID WASTE PRODUCED BY GLASS-STRENGTHENING PROCESS
    Publication number: 20130323156
    Abstract: Provided is a method and an apparatus for purifying potassium nitrate from the solid waste produced by a chemical glass-strengthening process. In the method, the solid waste is melted into a liquid waste at first. Potassium nitrate of various purity grades can be obtained by batch processing the liquid waste through stepwise cooling processes of cooling the liquid waste to a first temperature facilitating the potassium nitrate contained in the liquid waste to be crystallized at a first rate and then cooling the liquid waste to a second temperature close to the freezing point of the potassium nitrate at a second rate that is slower than the first rate. The recovered potassium nitrate from the solid waste can be recycled and reused.
    Type: Application
    Filed: January 17, 2013
    Publication date: December 5, 2013
    Applicant: NATIONAL FORMOSA UNIVERSITY
    Inventor: Min-Hui YANG