Patents by Inventor Tze Yuen Yeo

Tze Yuen Yeo 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 of producing metal carbonate from an ultramafic rock material
    Patent number: 9896741
    Abstract: A method of producing a metal carbonate from an ultramafic rock material is provided. The method includes providing an ultramafic rock material comprising a metal silicate; reacting the ultramafic rock material with an acid to form a mixture comprising a salt of the metal; contacting the mixture comprising a salt of the metal with oxygen so as to aerate impurities in the mixture and/or to remove residual acid from the mixture; heating the resultant mixture to decompose the salt of the metal to form metal oxide; and reacting the metal oxide with aqueous ammonium carbonate to obtain the metal carbonate. A system for producing a metal carbonate from ultramafic rock material is also provided.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: February 20, 2018
    Assignee: Agency for Science, Technology and Research
    Inventors: Jie Bu, Tze Yuen Yeo, Paul Sharratt
  • METHOD OF PRODUCING METAL CARBONATE FROM AN ULTRAMAFIC ROCK MATERIAL
    Publication number: 20160319395
    Abstract: A method of producing a metal carbonate from an ultramafic rock material is provided. The method includes providing an ultramafic rock material comprising a metal silicate; reacting the ultramafic rock material with an acid to form a mixture comprising a salt of the metal; contacting the mixture comprising a salt of the metal with oxygen so as to aerate impurities in the mixture and/or to remove residual acid from the mixture; heating the resultant mixture to decompose the salt of the metal to form metal oxide; and reacting the metal oxide with aqueous ammonium carbonate to obtain the metal carbonate. A system for producing a metal carbonate from ultramafic rock material is also provided.
    Type: Application
    Filed: December 23, 2014
    Publication date: November 3, 2016
    Applicant: Agency for Science, Technology and Research
    Inventors: Jie Bu, Tze Yuen Yeo, Paul Sharratt