Patents by Inventor Sadato KIKUCHI

Sadato KIKUCHI 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).

  • CALCIUM CARBONATE GENERATION METHOD AND SYSTEM
    Publication number: 20240351902
    Abstract: Provided is a calcium carbonate generation method and system in which calcium carbonate having a high purity can be generated using a calcium-containing waste. Provided is a calcium carbonate generation method of generating calcium carbonate from a calcium-containing waste, the calcium carbonate generation method including: a calcium dissolution step of adding aqueous hydrochloric acid to a calcium-containing waste and dissolving calcium to generate an aqueous solution containing a calcium ion; a separation step of adjusting a hydrogen ion concentration index of the aqueous solution containing a calcium ion and separating a component containing at least one selected from the group consisting of Si, Al, Mg, and heavy metal from the aqueous solution; and a calcium carbonate collection step of generating calcium carbonate using an aqueous solution obtained in the separation step and an aqueous solution containing potassium carbonate and/or sodium carbonate.
    Type: Application
    Filed: August 31, 2022
    Publication date: October 24, 2024
    Applicants: SUMITOMO OSAKA CEMENT CO., LTD., YAMAGUCHI UNIVERSITY, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Sadato KIKUCHI, Shogo NAKAMURA, Risa OIZUMI, Masayoshi KONISHI, Mitsuru HIGA, Ikuo TANIGUCHI